Influence of Terminal Imide Units on Properties and Photovoltaic Characteristics for Benzothiadiazole-based Nonfullerene Acceptors

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...

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Published inJournal of Photopolymer Science and Technology Vol. 30; no. 5; pp. 557 - 560
Main Authors Chatterjee, Shreyam, Ie, Yutaka, Aso, Yoshio
Format Journal Article
LanguageEnglish
Published Hiratsuka The Society of Photopolymer Science and Technology(SPST) 01.01.2017
Japan Science and Technology Agency
Subjects
Acceptor
Energy conversion efficiency
Organic photovoltaics
Photovoltaic cells
Semiconducting materials
Solar cells
Structure-property relationship
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Summary: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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ISSN:0914-9244
1349-6336
DOI:10.2494/photopolymer.30.557