Small band gap polymers synthesized via a modified nitration of 4,7-dibromo-2,1,3-benzothiadiazole

Ergang Wang; Lintao Hou; Zhongqiang Wang; Stefan Hellström; Wendimagegn Mammo; Fengling Zhang; Olle Inganäs; Mats R Andersson

doi:10.1021/ol1020724

Small band gap polymers synthesized via a modified nitration of 4,7-dibromo-2,1,3-benzothiadiazole

Org Lett. 2010 Oct 15;12(20):4470-3. doi: 10.1021/ol1020724.

Authors

Ergang Wang¹, Lintao Hou, Zhongqiang Wang, Stefan Hellström, Wendimagegn Mammo, Fengling Zhang, Olle Inganäs, Mats R Andersson

Affiliation

¹ Department of Chemical and Biological Engineering/Polymer Technology, Chalmers University of Technology, SE-412 96 Göteborg, Sweden. ergang@chalmers.se

PMID: 20843090
DOI: 10.1021/ol1020724

Abstract

The nitration of 4,7-dibromo-2,1,3-benzothiadiazole was modified by using CF(3)SO(3)H and HNO(3) 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-C(71)-butyric acid methyl ester exhibit interesting results with a power conversion efficiency of 2.1% and photoresponse up to 1.1 μm.