Complexation of polyaniline and graphene for efficient counter electrodes in dye-sensitized solar cells: Enhanced charge transfer ability

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• 作者：Benlin He ; Qunwei Tang ; ^{tangqunwei@hotmail.com" class="auth_mail} ; Min Wang ; Chunqing Ma ; Shuangshuang Yuan
• 关键词：Dye-sensitized solar cell ; Counter electrode ; Polyaniline ; Graphene ; Complex
• 刊名：Journal of Power Sources
• 出版年：15 June, 2014
• 年：2014
• 卷：256
• 期：Complete
• 页码：8-13
• 全文大小：1315 K

文摘

With an aim of significantly enhancing charge-transfer ability of counter electrodes and therefore photovoltaic performances of dye-sensitized solar cells (DSSCs), here we pioneerly report the complexation of polyaniline (PANi) and graphene as well as their employment as counter electrodes (CEs) in efficient DSSCs. Owing to the covalent bond between PANi (N atoms) and graphene (C atoms), charge transfer kinetics is dramatically elevated, which can be confirmed by the enhancement on electrocatalytic activity toward triiodides and a decrease in charge-transfer resistance. A power conversion efficiency of 7.70% is determined from DSSC using PANi鈭?聽wt鈥?graphene complex CE in comparison with 6.40% from pure PANi CE-based DSSC. The high conversion efficiency, facile charge-transfer in combination with simple preparation, relatively low cost, and scalability demonstrates the potential use of PANi鈭抔raphene complexes in robust DSSCs.