Towards Improvement of Photovoltaic Performance of Aqueous Dye-sensitized Solar Cells by Tungsten-doped Mesoporous Nanobeads TiO2 Working Electrode
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2019年第1期
论文作者：郭言荣 ZOU Tingting CHENG Qin JIAO Binqing 张晓俐
文章页码：17 - 22
摘 要：Tungsten doped（W-doped） TiO2 mesoporous nanobeads, possessing high surface area and superior scattering effect, were used for photoanode preparation. The W-doping would induce a positive shift of the TiO2 conduction band, and enhance the driving force for electron injection and collection efficiencies. The electrochemical impedance spectra indicated a retarded charge recombination and increased electron diffusion length after W-doping. By fine-tuning the W-doping concentration to 0.25%, aqueous DSCs produced a significant improved the open circuit voltage of 712 mV and a short circuit current of 7.05 mA·cm-2, leading to an overall increased power conversion efficiency of 3.40% at 1 000 W·m-2 simulated irradiation, which is roughly 25% enhancement compared to that without W-doping photoanode.
郭言荣1，ZOU Tingting1，CHENG Qin1，JIAO Binqing1，张晓俐2
1. State Key Laboratory of Silicate Materials for Architecture, Wuhan University of Technology2. State Centre for International Cooperation on Designer Low-Carbon & Environmental Materials, and School of Materials Science and Engineering, Zhengzhou University
摘 要：Tungsten doped（W-doped） TiO2 mesoporous nanobeads, possessing high surface area and superior scattering effect, were used for photoanode preparation. The W-doping would induce a positive shift of the TiO2 conduction band, and enhance the driving force for electron injection and collection efficiencies. The electrochemical impedance spectra indicated a retarded charge recombination and increased electron diffusion length after W-doping. By fine-tuning the W-doping concentration to 0.25%, aqueous DSCs produced a significant improved the open circuit voltage of 712 mV and a short circuit current of 7.05 mA·cm-2, leading to an overall increased power conversion efficiency of 3.40% at 1 000 W·m-2 simulated irradiation, which is roughly 25% enhancement compared to that without W-doping photoanode.
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