A-D-A-type small molecular acceptor with one hexyl-substituted thiophene as π bridge for fullerene-free organic solar cells

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• 作者：Yongtao Liu 刘勇涛 ; Hongtao Zhang 张洪涛 ; Yanna Sun 孙延娜…
• 关键词：A ; D ; A type ; fullerene ; free small molecule acceptor ; side chain modifying ; morphology
• 刊名：Science China Materials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：60
• 期：1
• 页码：49-56
• 全文大小：2666KB
• 刊物类别：Materials Science, general; Chemistry/Food Science, general;
• 刊物主题：Materials Science, general; Chemistry/Food Science, general;
• 出版者：Science China Press
• ISSN：2199-4501
• 卷排序：60

文摘

An A-D-A-type small molecule, DCF-2HT, was synthesized using fluorene as the central block and 2-(2,3-dihydro-3-oxo-1H-inden-1-ylidene)propanedinitrile as the end groups, with one hexyl-substituted thiophene as a π bridge, for use as an acceptor material in organic solar cells. Devices based on DCF-2HT and the polymer donors PBDB-T or PTB7-Th were fabricated and optimized. Power conversion efficiencies of 5.71% and 4.83% were obtained for PBDB-T: DCF-2HT- and PTB7-Th: DCF-2HT-based devices, respectively.