High stability of photovoltaic cells with phenethylammonium iodide-passivated perovskite layers and printable copper phthalocyanine-modified carbon electrodes
作者：
Wu, Yue;Wang, Shiyu;Ouyang, Tao;Li, Wenhui;Chen, Mingyue;...
期刊：
Nanotechnology ,2021年32(22):225701 ISSN：0957-4484
通讯作者：
Tang, Yiwen(ywtang@mail.ccnu.edu.cn)
作者机构：
[Tang, Yiwen; Chen, Mingyue; Qi, Pengcheng; Wang, Shiyu; Wu, Yue; Lu, Yu; Ouyang, Tao; Li, Wenhui] Cent China Normal Univ CCNU, Coll Phys & Technol, Dept Nanosci & Technol, Wuhan 430079, Peoples R China.
关键词：
Ammonium iodide;Band structure;Carbon;Conversion efficiency;Copper;Defects;Electrodes;Field effect transistors;Passivation;Perovskite;Photoelectrochemical cells;Photovoltaic cells;Conventional approach;Copper phthalocyanine;High work function;Hole transport layers;Power conversion efficiencies;Structural disorders;Structure modification;Voltage hysteresis;Perovskite solar cells
摘要：
Defects caused by the structural disorder of perovskites and voltage loss resulting from mismatched band structure are important issues to address to improve the performance of carbon-based perovskite solar cells. Different from the conventional approaches of additive-based passivation of perovskite precursors and introducing a hole-transport layer between the perovskite layer and carbon electrode, herein we report a defect-healing method using phenethyl ammonium iodide (PEAI) treatment and band-structure modification using high-work-function inorganic copper phthalocyanine (CuPc). Because of its relatively smoother surfaces and lower defect content, the optimized device after PEAI-based passivation of the perovskite achieves a power conversion efficiency (PCE) of 11.74%. The PCE is further raised to 13.41% through the auxiliary energy-level matching and high hole extraction abilities of the CuPc-modified carbon electrode. The best-performing device exhibits excellent moisture tolerance and thermal stability with minor current density-voltage hysteresis. © 2021 IOP Publishing Ltd.
语种：
英文
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Improved photovoltage of printable perovskite solar cells via Nb5+ doped SnO2 compact layer
作者：
Wang, Shiyu;Shen, Wenjian;Liu, Jiale;Ouyang, Tao;Wu, Yue;...
期刊：
Nanotechnology ,2021年32(14):145403 ISSN：0957-4484
作者机构：
[Tang, Yiwen; Chen, Mingyue; Qi, Pengcheng; Wang, Shiyu; Shen, Wenjian; Wu, Yue; Lu, Yu; Ouyang, Tao; Li, Wenhui] Cent China Normal Univ CCNU, Dept Nanosci & Technol, Coll Phys & Technol, Wuhan 430079, Peoples R China.;[Liu, Jiale] Huazhong Univ Sci & Technol HUST, Wuhan Natl Lab Optoelect WNLO, Michael Gratzel Ctr Mesoscop Solar Cells MGC, Wuhan 430074, Peoples R China.
通讯机构：
[Tang, Yiwen] C;Cent China Normal Univ CCNU, Dept Nanosci & Technol, Coll Phys & Technol, Wuhan 430079, Peoples R China.
关键词：
Carrier concentration;Display devices;Perovskite;Perovskite solar cells;Photovoltaic effects;Superconducting materials;Titanium dioxide;Carrier recombination;Conduction-band minimum;Density of defects;Electron transporting materials;High temperature;Hysteresis effect;Long term stability;Photo-electronic devices;Niobium compounds
摘要：
The state-of-the-art perovskite solar cells (PSCs) with SnO2 electron transporting material (ETL) layer displays the probability of conquering the low electron mobility and serious leakage current loss of the TiO2 ETL layer in photoelectronic devices. The rapid development of SnO2 ETL layer has brought perovskite efficiencies >20%. However, high density of defect states and voltage loss of high temperature SnO2 are still latent impediment for the long-term stability and hysteresis effect of photovoltaics. Herein, Nb5+ doped SnO2 with deeper energy level is utilized as a compact ETL for printable mesoscopic PSCs. It promotes carrier concentration increase caused by n-type doping, assists Fermi energy level and conduction band minimum to move the deeper energy level, and significantly reduces interface carrier recombination, thus increasing the photovoltage of the device. As a result, the use of Nb5+ doped SnO2 brings high photovoltage of 0.92 V, which is 40 mV higher than that of 0.88 V for device based on SnO2 compact layer. The resulting PSCs displays outstanding efficiency of 13.53%, which contains an ∼10% improvements compared to those without Nb5+ doping. Our study emphasizes the significance of element doping for compact layer and lays the groundwork for high efficiency PSCs. © 2021 IOP Publishing Ltd.
语种：
英文
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Room-temperature sulfurization for obtaining Co3O4/CoS core-shell nanosheets as supercapacitor electrodes
作者：
Lu, Yu;Yang, Wanjun;Li, Wenhui;Chen, Mingyue;Shuai, Ling;...
期刊：
Journal of Alloys and Compounds ,2020年818:152877 ISSN：0925-8388
通讯作者：
Tang, Yiwen
（ ;Qiu, Ming
作者机构：
[Tang, Yiwen; Du, Heping; Chen, Mingyue; Qi, Pengcheng; Yang, Wanjun; Lu, Yu; Zhang, Dan; Shuai, Ling; Qiu, Ming; Tang, YW; Li, Wenhui] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Technol, Wuhan 430079, Peoples R China.
通讯机构：
[Tang, YW; Qiu, M] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Technol, Wuhan 430079, Peoples R China.
关键词：
Activated carbon;Cobalt compounds;Electrodes;High temperature effects;Morphology;Nanosheets;Reduction;Sodium Borohydride;Supercapacitor;Asymmetric supercapacitor;Co3O4/CoS;Core shell;Electrochemical performance;High energy densities;High temperature materials;Room-temperature sulfudation;Supercapacitor electrodes;Shells (structures)
摘要：
Creating a hybrid cobaltous-based oxide/sulfide core-shell composite is an effective strategy to improve the composites conductivity thus enhance the electrochemical performance of cobaltous oxide. By using Co3O4 nanosheets (NSs) as precursor, a room-temperature sulfurization for obtaining Co3O4/CoS core-shell NSs via anion exchange is developed which show better supercapacitor performance in contrast to the most high-temperature material process required in synthesis of CoS. The study demonstrates that the preceding step of introducing oxygen vacancies to Co3O4 by NaBH4 solution reduction is crucial, which allows S2− to facilitate entering the position of O2− in the solid phase successfully at room temperature. The as-obtained Co3O4/CoS NSs preserve the porous morphology and have larger accessible active surface area and better conductivity than those of Co3O4 and CoS composite. In this report, the Co3O4/CoS NSs exhibit an improved specific capacitance of 1658 F g−1 at 1 A g−1 which can be maintained at 92.3% after 10,000 cycles. The corresponding assembled asymmetric supercapacitor with activated carbon as anode displays a high energy density of 23.6 Wh kg−1 at a power density of 250 W kg−1. © 2019 Elsevier B.V.
语种：
英文
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Synergistic enhancements in the performances of dye-sensitized solar cells by the scattering and plasmon resonance of Au-nanoparticle multi-shell hollow nanospheres
作者：
Bai, Lihua
* ;Liu, Jiaxian;Tang, Yiwen
* （ ;Wang, Chun;Wen, Junqing;...
期刊：
International Journal of Energy Research ,2020年44(8):7026-7034 ISSN：0363-907X
通讯作者：
Bai, Lihua;Tang, Yiwen
（ 作者机构：
[Wu, Hua; Wen, Junqing; Wang, Chun; Sun, Ruijuan; He, Wanlin; Bai, Lihua] Xian Shiyou Univ, Sch Sci, Xian 710065, Peoples R China.;[Liu, Jiaxian] Wuhan Univ, Sch Phys & Technol, Wuhan, Peoples R China.;[Tang, Yiwen] Cent China Normal Univ, Sch Phys Sci & Technol, Wuhan 430079, Peoples R China.
通讯机构：
[Tang, Yiwen] C;[Bai, Lihua] X;Xian Shiyou Univ, Sch Sci, Xian 710065, Peoples R China.;Cent China Normal Univ, Sch Phys Sci & Technol, Wuhan 430079, Peoples R China.
关键词：
composite photoanodes;dye-sensitized solar cells;localized surface plasmon resonance;multi-shell hollow structure;scattering enhancement
摘要：
Novel multi-shell hollow SiO2@Au@TiO2 (HSAT) nanospheres are synthesized by multi-step method. Composite photoanodes and Dye-sensitized solar cells (DSSCs) with different amount of HSAT nanospheres are studied. The study indicates that the HSAT nanospheres have enhanced the scattering and absorption of incident light in the photoanode, reduced the interface transmission resistance, increased the electron lifetime, and thus significantly improved performance of DSSCs. The maximal Jsc and photoelectric conversion efficiency (PCE) obtained in the optimal DSSC doped with HSAT of 3.0% are 15.83 mA cm−2 and 7.21%, greatly enhanced by 21.0% and 20.4%, respectively, compared with those of the pure TiO2-based DSSC. These remarkable enhancements in DSSCs performance can be attributed to the synergistic and complementary effects of the localized surface plasmon resonance and strong light scattering of HSAT nanospheres, which has significantly improved the absorption and utilization on incident light and thus the PCE of the DSSCs. Such synergistic and complementary effects of the different functions are also likely expected to play roles in the performance improvements in other solar cells. © 2020 John Wiley & Sons Ltd
语种：
英文
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Mesoporous-Carbon-Based Fully-Printable All-Inorganic Monoclinic CsPbBr3 Perovskite Solar Cells with Ultrastability under High Temperature and High Humidity
作者：
Wang, Shiyu;Shen, Wenjian;Chu, Yanmeng;Zhang, Weihua;Hong, Li;...
期刊：
Journal of Physical Chemistry Letters ,2020年11(22):9689-9695 ISSN：1948-7185
通讯作者：
Tang, Yiwen
（ ;Hu, Yue
作者机构：
[Tang, Yiwen; Wang, Shiyu; Shen, Wenjian] Cent China Normal Univ CCNU, Coll Phys & Technol, Dept Nanosci & Technol, Wuhan 430079, Peoples R China.;[Chu, Yanmeng; Zhang, Weihua; Mei, Anyi; Wang, Shiyu; Hu, Yue; Hong, Li; Han, Hongwei; Rong, Yaoguang] Huazhong Univ Sci & Technol HUST, Wuhan Natl Lab Optoelect WNLO, Michael Gratzel Ctr Mesoscop Solar Cells MGC, Wuhan 430074, Peoples R China.
通讯机构：
[Tang, Yiwen] C;[Hu, Yue] H;Cent China Normal Univ CCNU, Coll Phys & Technol, Dept Nanosci & Technol, Wuhan 430079, Peoples R China.;Huazhong Univ Sci & Technol HUST, Wuhan Natl Lab Optoelect WNLO, Michael Gratzel Ctr Mesoscop Solar Cells MGC, Wuhan 430074, Peoples R China.
关键词：
Bromine compounds;Carbon;Conversion efficiency;Lead compounds;Perovskite;Temperature;Annealing temperatures;Long term stability;Mesoporous carbon;Optoelectronic properties;Potential impediments;Power conversion efficiencies;Temperature dependent;Thermal cycling test;Perovskite solar cells
摘要：
The all-inorganic CsPb(IxBr1-x) 3 (0 <= x <= 1) perovskite solar cells (PSCs) are attractive by virtue of their high environmental and thermal stability. Nevertheless, multiple-step deposition and high annealing temperature (>250 degrees C) and the structural and optoelectronic properties changes upon temperature-dependent phase-transition are potential impediments for highly efficient and stable PSCs. Herein, a space-confined method to fabricate stable lower-order symmetric pure monoclinic CsPbBr3 phase at low temperature (<50 degrees C) is for the first time reported. It is found that the carbon-based mesoporous fully printable area can inhibit the phase transition to get a pure phase. Therefore, the device exhibits a power conversion efficiency of 7.52% with a low hysteresis index of 0.024. Moreover, the device passed the 1000 h 85 degrees C thermal test and the 200 cycles thermal cycling test according to IEC-61625 stability tests. These are critical progresses for achieving long-term stability and the stable pure inorganic perovskite phase of high-performance photovoltaics.
语种：
英文
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Performance optimization of dye-sensitized solar cells by gradient-ascent architecture of SiO_2@Au@TiO_2 microspheres embedded with Au nanoparticles
作者：
Li, Mingyue;Yuan, Na
* ;Tang, Yiwen
* （ ;Pei, Ling;Zhu, Yongdan;...
期刊：
材料科学技术(英文版) ,2019年35(4):604-609 ISSN：1005-0302
通讯作者：
Yuan, Na;Li, Meiya;Tang, Yiwen
（ 作者机构：
[Yuan, Na; Li, Mingyue; Liu, Jiaxian; Li, Meiya; Bai, Lihua] Wuhan Univ, Sch Phys & Technol, Key Lab Artificial Micro Nano Struct, Minist Educ, Wuhan 430072, Peoples R China.;[Tang, Yiwen] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Pei, Ling] Hubei Univ Technol, Sch Sci, Wuhan 430068, Hubei, Peoples R China.;[Zhu, Yongdan] Hubei Univ Nationalities, Sch Informat Engn, Enshi 445000, Peoples R China.
通讯机构：
[Tang, Yiwen] C;[Yuan, N; Li, MY] W;Wuhan Univ, Sch Phys & Technol, Key Lab Artificial Micro Nano Struct, Minist Educ, Wuhan 430072, Peoples R China.;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
关键词：
Electron resonance;Gold nanoparticles;Light absorption;Light reflection;Light scattering;Microspheres;Nanoparticles;Photoelectricity;Silica;Solar cells;Surface plasmon resonance;Titanium dioxide;Concentration gradients;Gradient ascent;Localized surface plasmon resonance;Performance optimizations;Photo-anodes;Photo-electric conversion efficiency;Surface plasma resonances;Well-dispersed;Dye-sensitized solar cells
摘要：
Highly homogeneous, well dispersed SiO2@Au@TiO2(SAT) microspheres decorated with Au nanoparticles (AuNPs) were prepared and incorporated into the photoanode with an optimized concentration gradient-ascent. The effects of SAT microspheres and the gradient-ascent architecture on the light absorption and the photoelectric conversion efficiency (PCE) of the dye-sensitized solar cells (DSSCs) were investigated. Studies indicate that the introduction of SAT microspheres and the gradient-ascent architecture in the photoanode significantly enhance the light scattering and harvesting capability of the photoanode. The DSSC with the optimized SAT gradient-ascent photoanode has the maximum short circuit current density (J(sc)) of 17.7 mA cm(-2) and PCE of 7.75%, remarkably higher than those of the conventional DSSC by 23.7% and 28.0%, respectively. This significantly enhancement of the performance of the DSSC can be attributed to the excellent light reflection/scattering of SAT, the localized surface plasma resonance (LSPR) effect of AuNPs within the microspheres, and the gradient-ascent architecture of SAT microspheres inside the photoanode. This study demonstrates that the tri-synergies of the scattering of SAT microspheres, the LSPR of AuNPs and the gradient-ascent architecture can effectively improve the PCE of DSSC. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
语种：
英文
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Synthesis of binder-free Co/CoO encapsulated in graphene as electrode material for electrochemical applications
作者：
Chen, Mingyue;Zhou, Qin;Du, Xuena;Zhang, Jing;Li, Wenhui;...
期刊：
Journal of Alloys and Compounds ,2019年783:363-370 ISSN：0925-8388
作者机构：
[Tang, Yiwen; Chen, Mingyue; Zhou, Qin; Zhang, Jing; Qi, Pengcheng; Du, Xuena; Lu, Yu; Zhang, Dan; Li, Wenhui] Cent China Normal Univ, Inst Nanosci & Technol, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Tang, Yiwen] C;Cent China Normal Univ, Inst Nanosci & Technol, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
关键词：
Capacitance;Chemical stability;Coatings;Electrochemical electrodes;Electrodeposition;Nanostructures;Sandwich structures;Supercapacitor;Asymmetric supercapacitor;Charge/discharge cycle;Core shell nano structures;Electrical conductivity;Electrochemical applications;ELectrochemical methods;Specific capacitance;Two-dimensional structures;Graphene
摘要：
Graphene-based materials have potential applications in supercapacitors, owing to their unique two-dimensional structure, high surface area, remarkable chemical stability, and outstanding electrical conductivity. In this work, Hummers method was used to prepare graphene oxide, and then in situ electrochemical method was firstly used to deposit graphene nanosheets on Co/CoO core-shell nano-structure to form a sandwich-type of Co/CoO/graphene electrode materials. The effect of electro-deposition graphene cycles on the electrochemical properties of Co/CoO/graphene composite were investigated. The results showed that the coating of graphene on Co/CoO further enhanced the conductivity of the material, and the specific capacitance reached 7.765 F cm−2 at the current density of 1 mA cm−2. The Co/CoO/graphene and AC were assembled into an asymmetric supercapacitor. After 10000 charge/discharge cycles, the total capacitance of the asymmetric supercapacitor was still maintained 79.9%. The coating of graphene not only increased the conductivity of the material, but also increased the stable of structure. © 2019 Elsevier B.V.
语种：
英文
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Remarkable enhancement of the electrochemical properties of Co3O4 nanowire arrays by in situ surface derivatization of an amorphous phosphate shell
作者：
Chen, Mingyue;Li, Wenhui;Ma, Wenhao;Qi, Pengcheng;Yang, Wanjun;...
期刊：
Journal of Materials Chemistry A ,2019年7(4):1678-1686 ISSN：2050-7488
作者机构：
[Tang, Yiwen; Chen, Mingyue; Qi, Pengcheng; Wang, Shiyu; Ma, Wenhao; Yang, Wanjun; Lu, Yu; Li, Wenhui] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Technol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Tang, Yiwen] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Technol, Wuhan 430079, Hubei, Peoples R China.
摘要：
It is a highly desirable but still a challenging task to find a simple, fast and straightforward method to greatly improve the electrochemical properties of a Co 3 O 4 electrode for pseudocapacitors. In this study, we demonstrate that developing an amorphous Co-phosphate (Co-Pi) shell via in situ surface derivatization on a Co 3 O 4 nanowire (NW) surface facilitates the diffusion and reaction of electrolyte ions and leads to distinctive conductivity. Because of these advantages, 1D nanostructures and the synergistic effect between Co 3 O 4 and amorphous Co-Pi, the resulting core-shell Co 3 O 4 @Co-Pi nanowire (NW) array exhibits high capacitance (1692 F g -1 at current density of 1 A g -1 ). In addition, high rate capabilities and retention capacity of 86% after 6000 cycles at 20 A g -1 are achieved. By using the Co 3 O 4 @Co-Pi core-shell hybrid NW array and activated carbon as the anode and cathode, respectively, asymmetric pseudocapacitors are assembled that exhibit high capacitance (energy density of 35.69 W h kg -1 at power density of 558 W kg -1 ) and super-long cycle life (82% capacitance retention after 40 000 cycles). Our synthesis method provides a new technology for the design of composites of transition metal oxides/hydroxides and phosphates for electrochemical energy storage applications. © 2019 The Royal Society of Chemistry.
语种：
英文
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Improve the performance of the quantum dot sensitized ZnO nanotube solar cells with inserting ZnS-MnS composites layers
作者：
Shen, Wenjian;Zhang, Jing;Wang, Shiyu;Du, Heping;Tang, Yiwen
* （ 期刊：
Journal of Alloys and Compounds ,2019年787:751-758 ISSN：0925-8388
作者机构：
[Tang, Yiwen; Du, Heping; Zhang, Jing; Wang, Shiyu; Shen, Wenjian] Cent China Normal Univ, Coll Phys & Technol, Inst Nanosci & Technol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Tang, Yiwen] C;Cent China Normal Univ, Coll Phys & Technol, Inst Nanosci & Technol, Wuhan 430079, Hubei, Peoples R China.
关键词：
Cadmium sulfide;Cadmium sulfide solar cells;Deposition;Efficiency;Energy gap;II-VI semiconductors;Ion exchange;Light;Light absorption;Manganese compounds;Nanocrystals;Nanotubes;Oxide minerals;Passivation;Polyelectrolytes;Quantum efficiency;Semiconductor quantum dots;Zinc oxide;Zinc sulfide;Absorption intensity;Charge recombinations;Chemical bath deposition methods;Chemical-bath deposition;Interface passivation layers;Power conversion efficiencies;Quantum dot-sensitized solar cells;Quantum dots-sensitized solar cells;Sulfur compounds
摘要：
Interface passivation layer deposited onto photoanodes has been proven to be an available way to suppress charge recombination and enhance the power conversion efficiency in quantum dot-sensitized solar cells. In this work, the ZnS-MnS composites layers inserted in ZnO/CdS nanotubes photoanodes interface is firstly fabricated via ion-exchange and chemical bath deposition methods, simultaneously. By inserting the ZnS-MnS composites, electron back transfer is efficiently hindered. In addition, the uniform ZnS-MnS layer effectively blocks the direct contact between the polysulfide electrolyte and ZnO nanotubes, which inhabits the recombination of electron-hole pairs occurred at the interface. Besides, the MnS layer is in favour of the CdS quantum dots in higher load, profiting the light absorption intensity in the visible light region. Thus ZnO/ZnS-MnS/CdS nanotubes quantum dot-sensitized solar cells have efficiency of 3.62%, which is much higher than that of the solar cell with ZnS passivation layer (2.33%). This work demonstrates that constructing ZnS-MnS interface passivation layer with a proper band gap structure is a promising approach to enhance the performance of quantum dot-sensitized solar cells. (C) 2019 Elsevier B.V. All rights reserved.
语种：
英文
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Synergic effect of graphene and core−shells structured Au NR@SiO2@TiO2 in dye-sensitized solar cells
作者：
Bai, Lihua
* ;Wen, Junqing;Tang, Yiwen
* （ ;Wu, Hua;Zhang, Han;...
期刊：
Nanotechnology ,2019年30(46):465401 ISSN：0957-4484
通讯作者：
Bai, Lihua;Tang, Yiwen
（ 作者机构：
[Wu, Hua; Wen, Junqing; Sun, Ruijuan; He, Wanlin; Bai, Lihua] Xian Shi You Univ, Sch Sci, Xian 710065, Shaanxi, Peoples R China.;[Tang, Yiwen] Cent China Normal Univ, Sch Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Zhang, Han; Wang, Xiao] Xidian Univ, Sch Microelect, State Key Discipline Lab Wide Band Gap Semicond T, Xian 710071, Shaanxi, Peoples R China.
通讯机构：
[Tang, Yiwen] C;[Bai, Lihua] X;Xian Shi You Univ, Sch Sci, Xian 710065, Shaanxi, Peoples R China.;Cent China Normal Univ, Sch Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
关键词：
Charge transfer;Electron resonance;Gold;Graphene;Light absorption;Nanorods;Shells (structures);Silica;Titanium dioxide;Au nano rods;Double shells;grapheme;Photo-anodes;Synergistic effect;Dye-sensitized solar cells
摘要：
Graphene and Au nanorods (AuNRs) coated with SiO2@TiO2 double shells (AuNR@SiO2@TiO2) were incorporated to form novel composite photoanodes in dye sensitized solar cells (DSSCs). The performances of the photoanodes and DSSCs are studied systematically. The short circuit current density (J sc) and power conversion efficiency (PCE) of these composited DSSCs were greatly enhanced and the influences of the graphene, AuNRs and the SiO2@TiO2 double shells were revealed. The optimal properties with the maximal J sc of 16.26 mA cm-2 and PCE of 8.08% are obtained in the DSSC co-doped with graphene and AuNR@SiO2@TiO2, significantly higher than those of the conventional DSSC with pure TiO2 photoanode by 37.7% and 32.9%, respectively. These significant enhancements in J sc and PCE are attributed to the synergistic effect of graphene, the local surface plasma resonance of AuNRs, as well as the outer SiO2@TiO2 double shells, which result in the increased specific surface area and dye adsorption, the increased light absorption, the decreased charge transfer resistance R 2 and electron recombination and thus the increased J sc and PCE of the DSSCs. © 2019 IOP Publishing Ltd.
语种：
英文
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A low-temperature carbon electrode with good perovskite compatibility and high flexibility in carbon based perovskite solar cells
作者：
Wang, Shiyu;Jiang, Pei;Shen, Wenjian;Mei, Anyi;Xiong, Sixing;...
期刊：
Chemical Communications ,2019年55(19):2765-2768 ISSN：1359-7345
通讯作者：
Yiwen Tang<&wdkj&>Yue Hu
作者机构：
[Tang, Yiwen; Wang, Shiyu; Shen, Wenjian] CCNU, Coll Phys & Technol, Nanosci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Mei, Anyi; Wang, Shiyu; Jiang, Xueshi; Hu, Yue; Han, Hongwei; Rong, Yaoguang; Jiang, Pei; Xiong, Sixing] HUST, WNLO, Michael Gratzel Ctr Mesoscop Solar Cells MGC, Wuhan 430074, Peoples R China.
通讯机构：
[Yiwen Tang] N;[Yue Hu] M;Michael Grätzel Center for Mesoscopic Solar Cells (MGC), Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST), Wuhan 430074, China<&wdkj&>Nano-Science & Technology, College of Physics and Technology, Central China Normal University (CCNU), Wuhan 430079, China
摘要：
A low-temperature carbon electrode with good perovskite compatibility is employed in hole-transport-material free perovskite solar cells, and a champion power conversion efficiency (PCE) of 11.7% is obtained. The PCE is enhanced to 14.55% by an interface modification of PEDOT:PSS. The application of this carbon on ITO/PEN substrates is also demonstrated.
语种：
英文
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Effective NaBH4 -exfoliated ultrathin multilayer Co(OH)2 nanosheets arrays and sulfidation for energy storage
作者：
Yang, Wanjun;Qu, Gan;Chen, Mingyue;Ma, Wenhao;Li, Wenhui;...
期刊：
Nanotechnology ,2018年29(29):295403 ISSN：0957-4484
作者机构：
[Tang, Yiwen; Chen, Mingyue; Ma, Wenhao; Yang, Wanjun; Li, Wenhui] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Qu, Gan] Shenzhen Univ, Collaborat Innovat Ctr Optoelect Sci & Technol, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov,Coll Optoelect Engn, Shenzhen 518060, Peoples R China.
通讯机构：
[Tang, Yiwen] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Technol, Wuhan 430079, Hubei, Peoples R China.
关键词：
Capacitance;Energy storage;Sodium Borohydride;Supercapacitor;Asymmetric supercapacitor;Capacitance retention;CoS2;Electrochemical performance;Energy storage properties;Specific capacitance;Sulfidation;Ultrathin multilayers;Nanosheets
摘要：
Facile engineering ultrathin nano structural materials is still a huge challenge for material science. Thereinto, the strategy of exfoliating shows great advantages. In this work, we develop a convenient approach to exfoliate Co(OH)2 nanosheets into ultrathin Co(OH)2 nanoflakes through NaBH4-exfoliation method. Moreover, the microstructures of the Co(OH)2 nanosheets are conveniently controlled by varying the exfoliation time. As a result, the obtained ultrathin Co(OH)2-72 h nanosheets deliver the excellent electrochemical performance. In order to improve the energy storage properties, the obtained ultrathin Co(OH)2 nanosheets are further modified to enhance the conductivity via sulfidation. Consequently, the synthesized Co(OH)2-72 h/CoS2 composites exhibit a specific capacitance of 2536 F g-1 at 1 A g-1, which is more outstanding than that of Co(OH)2-72 h. What's more, the Co(OH)2-72 h/CoS2 composites show a capacitance retention of 83.3% after 10 000 cycles. Besides, the assembled asymmetric supercapacitor displays a power density of 482 W kg-1 at an energy density of 36 Wh kg-1, demonstrating a large potential for application. © 2018 IOP Publishing Ltd.
语种：
英文
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Design of oxygen-deficient NiMoO4 nanoflake and nanorod arrays with enhanced supercapacitive performance
作者：
Qing, Chen;Yang, Chengxiang;Chen, Mingyue;Li, Wenhui;Wang, Shiyu;...
期刊：
Chemical Engineering Journal ,2018年354:182-190 ISSN：1385-8947
作者机构：
[Yang, Chengxiang; Qing, Chen] Yunnan Normal Univ, Coll Phys & Elect Informat Technol, Yunnan Key Lab Optoelect Informat Technol, Kunming 650500, Yunnan, Peoples R China.;[Tang, Yiwen; Chen, Mingyue; Wang, Shiyu; Qing, Chen; Li, Wenhui] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Technol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Tang, Yiwen] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Technol, Wuhan 430079, Hubei, Peoples R China.
关键词：
Asymmetric supercapacitor;Nanoflake arrays;Nanorod arrays;NiMoO4;Oxygen-deficient
摘要：
In this work, we report on the use of hydrothermal and hydrogenation processes to synthesize oxygen-deficient NiMoO4 nanoflake arrays (OD-NF) and nanowire arrays (OD-NW) for electrode applications. The introduction of oxygen vacancies into NiMoO4 increased the interlayer spacing of the crystal structure and Mo6+ in NiMoO4 was partially reduced to Mo4+. In addition to increasing the conductivity, the oxygen vacancies also promoted charge storage kinetics, while retaining the crystal structure of NiMoO4. The oxygen vacancies considerably influenced the capacitive performance of NiMoO4. Notably, OD-NF showed better electrochemical performance than that of OD-NW. Furthermore, our asymmetric supercapacitor device composed of NiMoO4 OD-NF and active carbon achieved 49.1 Wh kg−1 at a power density of 800 W kg−1 and retained a remarkable 94.2% specific capacitance after 6000 cycles. © 2018 Elsevier B.V.
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英文
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Celgard membrane-mediated ion diffusion for synthesizing hierarchical Co(OH)2 nanostructures for electrochemical applications
作者：
Chen, Mingyue;Qu, Gan;Yang, Wanjun;Li, Wenhui;Tang, Yiwen
* （ 期刊：
Chemical Engineering Journal ,2018年350:209-216 ISSN：1385-8947
作者机构：
[Tang, Yiwen; Chen, Mingyue; Yang, Wanjun; Li, Wenhui] Cent China Normal Univ, Inst Nanosci & Technol, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Qu, Gan] Shenzhen Univ, Collaborat Innovat Ctr Optoelect Sci & Technol, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov,Coll Optoelect Engn, Shenzhen 518060, Peoples R China.
通讯机构：
[Tang, Yiwen] C;Cent China Normal Univ, Inst Nanosci & Technol, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
关键词：
Celgard membrane;Co(OH)2;Electrochemistry;Nanostructure;Supercapacitor
摘要：
It remains a challenge to develop simple and mild strategies for synthesizing various Co(OH)<inf>2</inf>nanostructures on substrates. Inspired by semipermeable membranes, a Celgard membrane was used as an interface for separating components of the precursor solution and for ion exchange, to construct hierarchical Co(OH)<inf>2</inf>nanostructures. In contrast to traditional solvothermal reactions, this Celgard membrane-based method is simple and effective for preparing high-loading Co(OH)<inf>2</inf>array (density of approximately 7 mg cm<sup>−2</sup>) on Ni foam. The permeability of the Celgard membrane was affected by the presence of an organic solvent. The morphology of Co(OH)<inf>2</inf>could be adjusted by controlling the OH<sup>−</sup>diffusion rate across the Celgard membrane. OH<sup>−</sup>was formed via the hydrolysis of urea solution. The optimized Co(OH)<inf>2</inf>nanosheet electrode exhibited a specific capacitance of 2406 F g<sup>−1</sup>at 1 A g<sup>−1</sup>, and good cycling stability (89.1% capacitance retention after 5000 cycles) in 2 M aqueous KOH aqueous solution, using a typical three-electrode cell. An asymmetric supercapacitor was assembled with a Co(OH)<inf>2</inf>nanosheet array as the positive electrode, and activated carbon as the negative electrode. The asymmetric supercapacitor exhibited a high energy density (39.2 W h kg<sup>−1</sup>), high power density (9.2 kW kg<sup>−1</sup>at 28.9 W h kg<sup>−1</sup>), and excellent cycling stability (84.2% capacitance retention after 10,000 cycles).<br/> ©2018 Elsevier B.V.
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英文
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Bubble-assisted fabrication of hollow CoMoO4 spheres for energy storage
作者：
Qu, Gan;Tian, Bingbing;Su, Chenliang;Tang, Yiwen
* （ ;Li, Ying
* 期刊：
Chemical Communications ,2018年54(73):10355-10358 ISSN：1359-7345
通讯作者：
Li, Ying;Tang, Yiwen
（ 作者机构：
[Su, Chenliang; Li, Ying; Tian, Bingbing; Qu, Gan] Shenzhen Univ, Coll Optoelect Engn, SZU NUS Collaborat Ctr, Shenzhen 518060, Peoples R China.;[Su, Chenliang; Li, Ying; Tian, Bingbing; Qu, Gan] Shenzhen Univ, Int Collaborat Lab Mat Optoelect Sci & Technol 2D, Engn Technol Res Ctr Mat Informat Funct Devices &, Coll Optoelect Engn, Shenzhen 518060, Peoples R China.;[Tang, Yiwen; Qu, Gan] Cent China Normal Univ, Dept Phys & Technol, Inst Nanosci & Technol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Tang, Yiwen] C;[Li, Ying] S;Shenzhen Univ, Coll Optoelect Engn, SZU NUS Collaborat Ctr, Shenzhen 518060, Peoples R China.;Shenzhen Univ, Int Collaborat Lab Mat Optoelect Sci & Technol 2D, Engn Technol Res Ctr Mat Informat Funct Devices &, Coll Optoelect Engn, Shenzhen 518060, Peoples R China.;Cent China Normal Univ, Dept Phys & Technol, Inst Nanosci & Technol, Wuhan 430079, Hubei, Peoples R China.
摘要：
Herein, gas bubbles generated in situ from precursors assist the rapid construction of hollow sycamore fruit-like CoMoO4 spheres (HSCSs). This bubble-assisted fabrication strategy is easy to operate, ultra-fast, low cost and post-treatment-free, showing great potential for the large-scale production of HSCSs. The growth mechanism of HSCSs is discussed to reveal the evolution process, which may be generalized to the construction of a series of hollow ternary Mo-based oxides. The obtained HSCSs exhibit a superior specific capacitance and outstanding cyclic stability when applied in supercapacitors.
语种：
英文
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In situ facile bubble-templated fabrication of new-type urchin-like (Li,Mo)-doped Li-x(Mo0.3V0.7)(2)O-5 for Zn2+ storage
作者：
Qu, Gan;Zhao, Lulu;Jia, Shuangfeng;Zheng, He;Li, Lei;...
期刊：
Journal of Materials Chemistry A ,2017年5(34):18253-18260 ISSN：2050-7488
通讯作者：
Tang, Yiwen
（ ;Wang, Jianbo
作者机构：
[Tang, Yiwen; Ma, Wenhao; Qu, Gan; Yang, Wanjun] Cent China Normal Univ, Inst Nanosci & Technol, Dept Phys & Technol, Wuhan 430079, Hubei, Peoples R China.;[Zheng, He; Zhao, Lulu; Jia, Shuangfeng; Wang, Jianbo; Qu, Gan; Li, Lei] Wuhan Univ, Sch Phys & Technol, Ctr Electron Microscopy, MOE Key Lab Artificial Micro & Nanostruct,Inst Ad, Wuhan 430072, Hubei, Peoples R China.;[Wang, Hai] China Univ Geosci, Sch Math & Phys, Wuhan 430074, Hubei, Peoples R China.
通讯机构：
[Tang, Yiwen] C;[Wang, Jianbo] W;Cent China Normal Univ, Inst Nanosci & Technol, Dept Phys & Technol, Wuhan 430079, Hubei, Peoples R China.;Wuhan Univ, Sch Phys & Technol, Ctr Electron Microscopy, MOE Key Lab Artificial Micro & Nanostruct,Inst Ad, Wuhan 430072, Hubei, Peoples R China.
摘要：
Interstitial (Li) and substitutional-type (Mo) co-doped new-type urchin-like Li<inf>x</inf>(Mo<inf>0.3</inf>V<inf>0.7</inf>)<inf>2</inf>O<inf>5</inf>(LMVO) is fabricated via in situ gas bubble template strategy, which leads to distinctive conductivity, high number of active sites, reversible ion intercalation and accessible redox couple. Consequently, the electrochemical performance of LMVO is enhanced enormously owing to the hollow morphology and unique electronic structure. The charge storage capability of the synthetic LMVO is investigated in Mg<sup>2+</sup>and Zn<sup>2+</sup>electrolytes as well as Li<sup>+</sup>electrolyte, due to the similar radius, higher charge, abundant reserve and rational cost. As a result, LMVO achieves a specific capacitance of 484 F g<sup>-1</sup>at 1 A g<sup>-1</sup>in Zn<sup>2+</sup>electrolyte, which apparently surpasses the performance in Li<sup>+</sup>and Mg<sup>2+</sup>electrolytes. Moreover, the assembled LMVO//LMVO device delivers a specific capacitance of 117 F g<sup>-1</sup>at 0.8 A g<sup>-1</sup>, which indicates large potential for application.<br/> ©2017 The Royal Society of Chemistry.
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英文
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基于“Sellmeier公式的光波波长测量”探究性实验设计
期刊：
大学物理实验 ,2017年30(6):61-64 ISSN：1007-2934
作者机构：
[唐一文; 黄林; 王建中] 华中师范大学
关键词：
Sellmeier公式;波长测量
摘要：
设计了基于Sellmeier公式的光波波长测量装置,该装置以起偏器、旋光片、沃拉斯顿棱镜为核心光学器件,结合"光电探测器"和LabVIEW实验程序,实现通过"相对光强",对单色光波长进行较为快速和准确的测量.
语种：
中文
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Scattering and plasmonic synergetic enhancement of the performance of dye-sensitized solar cells by double-shell SiO2@Au@TiO2 microspheres
作者：
Li, Mingyue;Li, Meiya
* ;Zhu, Yongdan
* ;Tang, Yiwen
（ ;Bai, Lihua;...
期刊：
Nanotechnology ,2017年28(26):265202 ISSN：0957-4484
通讯作者：
Li, Meiya;Zhu, Yongdan
作者机构：
[Zhao, Xingzhong; Wang, Zhen; Li, Mingyue; Lei, Wen; Li, Meiya; Bai, Lihua] Wuhan Univ, Sch Phys & Technol, Minist Educ, Wuhan 430072, Hubei, Peoples R China.;[Zhao, Xingzhong; Wang, Zhen; Li, Mingyue; Lei, Wen; Li, Meiya; Bai, Lihua] Wuhan Univ, Key Lab Artificial Micro Nano Struct, Minist Educ, Wuhan 430072, Hubei, Peoples R China.;[Zhu, Yongdan] Hubei Univ Nationalities, Sch Informat Engn, Enshi 445000, Hubei, Peoples R China.;[Tang, Yiwen] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Li, Meiya] W;[Zhu, Yongdan] H;Wuhan Univ, Sch Phys & Technol, Minist Educ, Wuhan 430072, Hubei, Peoples R China.;Wuhan Univ, Key Lab Artificial Micro Nano Struct, Minist Educ, Wuhan 430072, Hubei, Peoples R China.;Hubei Univ Nationalities, Sch Informat Engn, Enshi 445000, Hubei, Peoples R China.
关键词：
Dyes;Gold;Light scattering;Microspheres;Nanoparticles;Photoelectricity;Plasmons;Solar cells;Surface plasmon resonance;Synthesis (chemical);Titanium dioxide;Au nanoparticle;Double shells;Localized surface plasmon resonance;Photo-electric conversion efficiency;Photogenerated electrons;synergetic complementary;Dye-sensitized solar cells
摘要：
The Au nanoparticle sandwich double spheric-shells of SiO2@Au@TiO2 (SAT) microspheres are synthesized. The significant influence of the SAT microspheres on the properties of dye-sensitized solar cells (DSSCs) is investigated. Studies indicate that the introduction of SAT markedly enhanced the light scattering and capture ability of DSSCs and thus photogenerated electrons. DSSCs doped with 2.25 wt% SAT exhibit a maximum short circuit current density of 17.0 mA cm-2 and photoelectric conversion efficiency of 7.14%, which are remarkably higher than those of conventional DSSCs at 15.7% and 21.2%, respectively. The marked enhancement in the performance of the optimal DSSCs can be attributed to the synergetic complementary effect of the enhanced light scattering of the microspheres and to the localized surface plasmon resonance of the Au nanoparticles in the SAT, and is a novel promising way of enhancing the performance of DSSCs. © 2017 IOP Publishing Ltd.
语种：
英文
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Controllable shell thickness of Co/CoO core-shell structure on 3D nickel foam with high performance supercapacitors
作者：
Wang, Ling;Wang, Hai;Qing, Chen;Qu, Gan;Ma, Wenhao;...
期刊：
Journal of Alloys and Compounds ,2017年726:139-147 ISSN：0925-8388
作者机构：
[Tang, Yiwen; Ma, Wenhao; Wang, Hai; Qing, Chen; Wang, Ling] Cent China Normal Univ, Inst Nanosci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Qu, Gan] Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China.
通讯机构：
[Tang, Yiwen] C;Cent China Normal Univ, Inst Nanosci & Technol, Wuhan 430079, Hubei, Peoples R China.
关键词：
Annealing;Capacitance;Cobalt compounds;Cobalt metallography;Display devices;Electrodes;High resolution transmission electron microscopy;Nanostructures;Nickel;Scanning electron microscopy;Supercapacitor;Application prospect;Asymmetric supercapacitor;Controllable shell thickness;Core shell nano structures;Core shell structure;Electrochemical performance;High energy densities;Thickness of shell;Shells (structures)
摘要：
Co/CoO core-shell nanostructure on the 3D nickel foam has been synthesized by a hydrothermal method following by annealing the precursor in hydrogen atmosphere and air respectively. Different shell thicknesses of the CoO are designed and controlled by annealing the nanostructured Co in the air at 50 °C, 100 °C, 150 °C, 200 °C for 2 h, which were characterized by X-ray diffraction (XRD), Raman spectroscopy, Scanning electron microscope (SEM), transmission electron microscopy (TEM), X–ray photoelectronspectroscopy (XPS). As a result, Co/CoO core-shell nanostructure annealed at 150 °C achieved the best electrochemical performance (ultrahigh areal capacitance of 6.08 F cm<sup>−2</sup>), which was superior to those treated in other temperatures. An asymmetric supercapacitor device was assembled by using the Co/CoO core-shell nanostructure (positive electrode) and the active carbon (negative electrode), which can deliver a working voltage of 1.5 V, and display a high energy density of 0.51 mWh cm<sup>−2</sup>at a power density of 2.03 mW cm<sup>−2</sup>. The results show that the Co/CoO core-shell nanostructure has potential application prospect in the pseudocapacitor.<br/> ©2017 Elsevier B.V.
语种：
英文
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Plasmonic enhancement of the performance of dye-sensitized solar cells by incorporating TiO2 nanotubes decorated with Au nanoparticles
作者：
Wang, Zhen;Tang, Yiwen
（ ;Li, Meiya;Zhu, Yongdan
* ;Li, Mingyue
* ;...
期刊：
Journal of Alloys and Compounds ,2017年714:89-95 ISSN：0925-8388
通讯作者：
Li, Mingyue;Zhu, Yongdan
作者机构：
[Zhao, Xingzhong; Luoshan, Mengdai; Wang, Zhen; Li, Mingyue; Lei, Wen; Li, Meiya; Bai, Lihua] Wuhan Univ, Sch Phys & Technol, Key Lab Artificial Micro Nano Struct, Minist Educ, Wuhan 430072, Peoples R China.;[Tang, Yiwen] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Zhu, Yongdan] Hubei Univ Nationalities, Sch Informat Engn, Enshi 445000, Hubei, Peoples R China.
通讯机构：
[Li, Mingyue] W;[Zhu, Yongdan] H;Wuhan Univ, Sch Phys & Technol, Key Lab Artificial Micro Nano Struct, Minist Educ, Wuhan 430072, Peoples R China.;Hubei Univ Nationalities, Sch Informat Engn, Enshi 445000, Hubei, Peoples R China.
关键词：
Charge transfer;Gold;Nanocomposite films;Nanocrystals;Nanoparticles;Nanotubes;Photoelectricity;Plasmons;Solar cells;Surface plasmon resonance;Synthesis (chemical);Titanium dioxide;Yarn;Au nanoparticle;Charge transfer resistance;Complementary effects;DSSCs;Multifunctional composites;Nano-crystalline films;Photo-anodes;Photo-electric conversion efficiency;Dye-sensitized solar cells
摘要：
The TiO<inf>2</inf>nanotubes (TNT) are synthesized and decorated with Au nanoparticles, forming a TNT-Au composite. This TNT-Au composite is incorporated into a TiO<inf>2</inf>nanocrystalline film to form a multifunctional composite photoanode and the dye-sensitized solar cell (DSSC). The influences of different amounts of TNT-Au on the performance of the multifunctional composite photoanodes and DSSCs are investigated. Studies indicate that, the introduction of TNT-Au improves remarkably the transport rate of electrons, enhances the ability of photoanode to scatter and capture incident light, reduces the charge transfer resistance, and thereby improves significantly the short-circuit current density (J<inf>sc</inf>) and photoelectric conversion efficiency (PCE) of the DSSCs. The maximal J<inf>sc</inf>of 14.72 mA cm<sup>−2</sup>and PCE of 6.94% are obtained in the optimal DSSC with 10 wt% TNT-Au, significantly higher than those of the DSSC with pure TiO<inf>2</inf>photoanode by 24.3% and 21.8%, respectively. These remarkable improvement in the properties of the DSSCs can be attributed to the strong scattering of TNT for incident light, fast charge transfer of TNT due to their unique one dimensional hollow structure, and the surface plasmon resonance of Au nanoparticles, in a tri-synergistic and complementary fashion.<br/> ©2017
语种：
英文
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