6 March 2013 Monolithic quasi-solid-state dye-sensitized solar cells based on graphene modified mesoscopic carbon counter electrodes
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Abstract
We have developed a monolithic quasi-solid-state dye-sensitized solar cell (DSSC) based on graphene modified mesoscopic carbon counter electrode (GC-CE), which offers a promising prospect for commercial applications. Based on the design of a triple layer structure, the TiO2 working electrode layer, ZrO2 spacer layer and carbon counter electrode (CE) layer are constructed on a single conducting glass substrate by screen-printing. The quasi-solid-state polymer gel electrolyte employs a polymer composite as the gelator and could effectively infiltrate into the porous layers. Fabricated with normal carbon counter electrode (NC-CE) containing graphite and carbon black, the device shows a power conversion efficiency (PCE) of 5.09% with the fill factor (FF) of 0.63 at 100 mW cm-2 AM1.5 illumination. When the NC-CE is modified with graphene sheets, the PCE and FF could be enhanced to 6.27% and 0.71, respectively. This improvement indicates excellent conductivity and high electrocatalytic activity of the graphene sheets, which have been considered as a promising platinum-free electrode material for DSSCs.
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Yaoguang Rong, Yaoguang Rong, Xiong Li, Xiong Li, Guanghui Liu, Guanghui Liu, Heng Wang, Heng Wang, Zhiliang Ku, Zhiliang Ku, Mi Xu, Mi Xu, Linfeng Liu, Linfeng Liu, Min Hu, Min Hu, Ying Yang, Ying Yang, Hongwei Han, Hongwei Han, } "Monolithic quasi-solid-state dye-sensitized solar cells based on graphene modified mesoscopic carbon counter electrodes", Proc. SPIE 8622, Organic Photonic Materials and Devices XV, 86221G (6 March 2013); doi: 10.1117/12.2002769; https://doi.org/10.1117/12.2002769
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