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Synthesis and Photovoltaic Properties of a Thienylenevinylene and Diketopyrrolopyrrole Copolymer with High Mobility

✍ Scribed by Bogyu Lim; Jun-Seok Yeo; Dongyoon Khim; Dong-Yu Kim

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
395 KB
Volume
32
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

A novel donor–acceptor‐type polymer with a low band‐gap that alternates electron‐rich thienylenevinylene groups with electron‐deficient diketopyrrolopyrrole (DPP) units (PETVTDPP) has been synthesized by Pd‐catalyzed Stille cross‐coupling polymerization. The polymer shows a broad absorption band of wavelengths that range from 330 to 900 nm, and a low band‐gap value of 1.43 eV. The field‐effect mobility of an organic thin‐film transistor based on this polymer is 0.05 cm^2^· Vs^−1^. Bulk‐heterojunction solar cells using a mixture of PETVTDPP and PC~[71]~BM for the active layer show a power conversion efficiency (PCE) of 1.94% under simulated AM 1.5 G solar irradiation at 100 mW · cm^−2^.

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