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Enhanced Performance of Organic Photovoltaic Cells Fabricated with a Methyl Thiophene-3-Carboxylate-Containing Alternating Conjugated Copolymer

✍ Scribed by Min Ju Cho; Jangwon Seo; Kyung Hwan Kim; Dong Hoon Choi; Paras N. Prasad

Book ID: 102943162
Publisher: John Wiley and Sons
Year: 2011
Tongue: English
Weight: 617 KB
Volume: 33
Category: Article
ISSN: 1022-1336
DOI: 10.1002/marc.201100501

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✦ Synopsis

Abstract

A new donor‐acceptor copolymer, containing benzodithiophene (BDT) and methyl thiophene‐3‐carboxylate (3MT) units, is designed and synthesized for polymer solar cells (PSCs). The 3MT unit is used as an electron acceptor unit in this copolymer to provide a lower highest occupied molecular orbital (HOMO) level for obtaining polymer solar cells with a higher open‐circuit voltage (V~OC~). The resulting bulk heterojunction PSC made of the copolymer and [6,6]‐phenyl‐C71‐butyric acid methyl ester (PC~71~BM) exhibits a power conversion efficiency (PCE) up to 4.52%, a short circuit current (J~SC~) of 10.5 mA·cm‐^2^, and a V~OC~ of 0.86 V.

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