Copper-based redox couple for Acetylene-Bridged 9, 10-Conjugated Anthracene Sensitized Solar Cell with >1.0V open circuit voltage
Mi-Jen Kuo a, Yu-Chieh Liu a, Hsien-Hsin Chou b, Chen-Yu Yeh b, Tzu-Chien Wei a
a Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan
b National Chung Hsing University, Department of Chemistry and Research Center for Sustainable Energy & Nanotechnology,Taiwan, Taichung, North District, Taichung City, Taiwán, Taichung, Taiwan, Republic of China
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics 2018 (AP-HOPV18)
Kitakyūshū-shi, Japan, 2018 January 28th - 30th
Organizers: Shuzi Hayase, Juan Bisquert and Hiroshi Segawa
Poster, Mi-Jen Kuo, 136
Publication date: 27th October 2017

Recently, copper complex redox couple has been reported to have many advantages such as low cost, wide accessible and fast electron self-exchange. Moreover, the most promising property for the copper complex redox couple is the minor voltage loss on dye regeneration, leading to considerably higher open circuit voltage (VOC) than conventional iodide/tri-iodide redox couple under one sun, AM1.5 test condition. However, its bulky structure leads to slow diffusion and thus limits its performance. One of the strategies to amend the mass transport problem of copper complex redox couple is to use thin TiO2 film, but this arrangement also leads to insufficient light-harvesting. Herein, we fabricated a dye-sensitized solar cell (DSC) by using a high absorption coefficient anthracene-based sensitizer, TY6, to integrate with copper complex redox couple. By optimizing the thickness of TiO2 films, the DSC with JSC of 8.80 mAcm-2, VOC of 1.08 V, FF of 0.69, corresponding a power conversion efficiency (PCE) of 6.64% has been achieved. Meanwhile, The photovoltaic performance of this TY6-sensitized, copper mediated solar cell under dim light condition is also measured. It turns out the VOC can maintain >0.8 V and PCE is over 17% under 300 lux, T5 fluorescent light irradiation, showing a great potential of practical usage in indoor environment.

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