Small Band Gap Polymers Synthesized via a Modified Nitration of 4,7-Dibromo-2,1,3-benzothiadiazole

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• 作者：Ergang Wang ; Lintao Hou ; Zhongqiang Wang ; Stefan Hellstrm ; Wendimagegn Mammo ; Fengling Zhang ; Olle Ingans ; Mats R. Andersson
• 刊名：Organic Letters
• 出版年：2010
• 出版时间：October 15, 2010
• 年：2010
• 卷：12
• 期：20
• 页码：4470-4473
• 全文大小：245K
• 年卷期：v.12,no.20(October 15, 2010)
• ISSN：1523-7052

文摘

The nitration of 4,7-dibromo-2,1,3-benzothiadiazole was modified by using CF₃SO₃H and HNO₃ as the nitrating agent, and the related yield was improved greatly. On the basis of this improvement, two new small band gap polymers, P1TPQ and P3TPQ, were developed. Bulk heterojunction solar cells based on P3TPQ and [6,6]-phenyl-C₇₁-butyric acid methyl ester exhibit interesting results with a power conversion efficiency of 2.1% and photoresponse up to 1.1 μm.