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

Ergang Wang, Lintao Hao, Zhongqiang Wang, Stefan Hellstrom, Wendimagegn Mammo, Fengling Zhang, Olle Inganas, Mats R. Andersson

    Research output: Contribution to journalArticlepeer-review

    78 Citations (Scopus)


    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.

    Original languageEnglish
    Pages (from-to)4470-4473
    Number of pages4
    JournalOrganic Letters
    Issue number20
    Publication statusPublished - 15 Oct 2010


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