Graphene Quantum-Dot-Doped Polypyrrole Counter Electrode for High-Performance Dye-Sensitized Solar Cells

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• 作者：Lijia Chen ; Chun Xian Guo ; Qiaoming Zhang ; Yanlian Lei ; Jiale Xie ; Shujing Ee ; Guanhong Guai ; Qunliang Song ; Chang Ming Li
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：March 27, 2013
• 年：2013
• 卷：5
• 期：6
• 页码：2047-2052
• 全文大小：443K
• 年卷期：v.5,no.6(March 27, 2013)
• ISSN：1944-8252

文摘

Herein graphene quantum dot (GQD), a graphene material with lateral dimension less than 100 nm, is explored to dope PPy on F-doped tin oxide glass as an efficient counter electrode for high-performance dye-sensitized solar cells (DSSCs). The GQDs-doped PPy film has a porous structure in comparison to the densely structured plain PPy, and displays higher catalytic current density and lower charge transfer resistance than the latter toward I₃鈥?/sup>/I鈥?/sup> redox reaction. The highest power conversion efficiency (5.27%) for DSSCs is achieved with PPy doped with10% GQDs, which is comparable to that of Pt counter electrode-based DSSCs. This work provides an inexpensive alternative to replace platinum for DSSCs.

Keywords:

graphene quantum dots; polypyrrole; platinum-free counter electrode; dye-sensitized solar cell