Journal of Photopolymer Science and Technology
Online ISSN : 1349-6336
Print ISSN : 0914-9244
ISSN-L : 0914-9244
Influence of Terminal Imide Units on Properties and Photovoltaic Characteristics for Benzothiadiazole-based Nonfullerene Acceptors
Shreyam ChatterjeeYutaka IeYoshio Aso
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2017 Volume 30 Issue 5 Pages 557-560

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Abstract

Development of new semiconducting materials has become an important subject to develop organic photovoltaics. In this letter, new electron-accepting π-conjugated molecules, which are composed of thiophene-linked benzothiadiazole (T-BTz) as a central unit and phthalimide (PI) or naphthalimide (NI) as a terminal unit, were designed and synthesized to investigate the influence of the terminal units on the properties and photovoltaic characteristics. The utilization of NI led to red-shifted absorption and increased electron-accepting characteristics, compared to those of PI. Furthermore, the photovoltaic device based on T-BTz-NI under the combination with poly(3-hexylthiophene) as a donor showed improved power conversion efficiency of 1.16%. These results indicate that NI become a good candidate for a terminal unit of non-fullerene acceptors.

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© 2017 The Society of Photopolymer Science and Technology (SPST)
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