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이산화티타튬 페이스트에 TBA 첨가에 따른 염료감응 태양전지의 효율향상 및 전기화학적 분석
이민오(Minoh Lee),정초롱(Cho-long Jung),최우열(Woo-yeol Choi),조임현(Yimhyun Jo) 한국태양광발전학회 2014 Current Photovoltaic Research Vol.2 No.3
Dye-sensitized solar cells (DSSCs) are considered as promising alternatives to conventional photovoltaic device. However, commercialization of the DSSCs is restricted due to the low efficiency. In this paper, highly efficiency DSSCs were fabricated by the adding the TBA to the TiO₂ paste. TiO₂ photoanode added 0.2 M TBA in DSSCs are shown the best efficiency of 9.14 %. This result ascribed to improvement of the connection between the TiO2 nanoparticles by the addition of the optimized amount TBA. The morphology of the photoanode was observed by FE-SEM. Further investigation about the kinetics of the electrochemical processes are performed by the EIS analysis. Longest diffusion length was obtained in case adding 0.2 M of TBA to TiO₂ paste, which was matched well with the improved efficiency.