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Synthesis and Photovoltaic Properties of Donor–Acceptor Copolymer Based on Dithienopyrrole and Thienopyrroledione

✍ Scribed by Erjun Zhou; Junzi Cong; Keisuke Tajima; Chunhe Yang; Kazuhito Hashimoto

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
396 KB
Volume
212
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

A novel donor–acceptor (D–A) type alternating copolymer based on dithieno[3,2‐b:2′,3′‐d]pyrrole (DTP) and thieno[3,4‐c]pyrrole‐4,6‐dione (TPD) was synthesized. The polymer has a broad absorption spectrum in the range of 350–810 nm. The energy levels of the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) of the copolymer were −5.11 and −3.63 eV, respectively, as determined by cyclic voltammetry. Bulk heterojunction type polymer solar cells based on PDTP‐TPD and PC~70~BM, showed power conversion efficiency (PCE) up to 1.6% with an open‐circuit voltage of V~OC~ = 0.66 V, a short‐circuit current of I~SC~ = 4.98 mA · cm^−2^, and a fill factor of FF = 0.50. The V~OC~ of 0.66 V is the highest value among DTP‐based photovoltaic polymers. magnified image

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