Phenoxazine-based organic dyes with different chromophores for dye-sensitized solar cells

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• 作者：Haijun Tan ; Chunyue Pan ; Gang Wang ; Yingying Wu ; Yiping Zhang ; Yingping Zou ; Guipeng Yu ; Min Zhang
• 关键词：Solar energy ; Dye-sensitized solar cells ; Organic dyes ; Phenoxazine ; Chromophores
• 刊名：Organic Electronics
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：14
• 期：11
• 页码：2795-2801
• 全文大小：1437 K

文摘

A series of organic dyes (POZ-2, POZ-3, POZ-4 and POZ-5) involving phenoxazine were synthesized as sensitizers for application in dye-sensitized solar cells (DSSCs). For comparison, three different electron donors namely 10-phenyl-10H-phe-nothiazine, 10-phenyl-10H-phenoxazine and triphenylamine were separately appended onto the 7-position of the model dye (POZ-2). The obtained four dyes exhibit considerably high values of conversion efficiencies of 6.6 % , 7.8 % , 7.1 % and 6.4 % , respectively, under the simulated AM1.5G conditions. The geometries of the dyes were optimized to gain insight into the molecular structure and electron distribution, and then the charge extraction and transient photovoltage decay measurements were further performed to understand the influence of electron donors on the photovoltaic behaviors.