Journal
ORGANIC LETTERS
Volume 12, Issue 20, Pages 4470-4473Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol1020724
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Funding
- Swedish Energy Agency
- Knut and Alice Wallenberg Sultelse
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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
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