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Title
Small Band Gap Polymers Synthesized via a Modified Nitration of 4,7-Dibromo-2,1,3-benzothiadiazole
Article in journal
Authors
Ergang Wang, Lintao Hou, Zhongqiang Wang, Stefan Hellstrom, Wendimagegn Mammo, Fengling Zhang, Olle Inganäs, Mats R Andersson
Publication Year
2010
Source
ORGANIC LETTERS, 2010, (12)20, 4470-4473
Link to Source (DOI)
10.1021/ol1020724
Abstract
<p>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 P3TPO and [6,6]-phenyl-C-71-butyric acid methyl ester exhibit interesting results with a power conversion efficiency of 21% and photoresponse up to 1.1 mu m</p>