Monolithic quasi-solid-state dye-sensitized solar cells based on graphene modified mesoscopic carbon counter electrodes

Yaoguang Rong; Xiong Li; Guanghui Liu; Heng Wang; Zhiliang Ku; Mi Xu; Linfeng Liu; Min Hu; Ying Yang; Hongwei Han

doi:10.1117/12.2002769

6 March 2013 Monolithic quasi-solid-state dye-sensitized solar cells based on graphene modified mesoscopic carbon counter electrodes

Yaoguang Rong, Xiong Li, Guanghui Liu, Heng Wang, Zhiliang Ku, Mi Xu, Linfeng Liu, Min Hu, Ying Yang, Hongwei Han

Author Affiliations +

Proceedings Volume 8622, Organic Photonic Materials and Devices XV; 86221G (2013) https://doi.org/10.1117/12.2002769
Event: SPIE OPTO, 2013, San Francisco, California, United States

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, Xiong Li, Guanghui Liu, Heng Wang, Zhiliang Ku, Mi Xu, Linfeng Liu, Min Hu, Ying Yang, and 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); https://doi.org/10.1117/12.2002769

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KEYWORDS

Dye sensitized solar cells

Electrodes

Carbon

Graphene

Glasses

Titanium dioxide

Resistance

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