An A2–π–A1–π–A2-type small molecule donor for high-performance organic solar cells

Qian Zhang; Yanna Sun; Xianjie Chen; Zhijing Lin; Xin Ke; Xiaoyuan Wang; Tian He; Shouchun Yin; Yongsheng Chen; Huayu Qiu

doi:10.1039/C9TC01251F

An A₂–π–A₁–π–A₂-type small molecule donor for high-performance organic solar cells†

Qian Zhang,

‡*^a Yanna Sun,‡^b Xianjie Chen,^a Zhijing Lin,^a Xin Ke,^b Xiaoyuan Wang,^a Tian He,^a Shouchun Yin,

^a Yongsheng Chen

^b and Huayu Qiu

*^a

Author affiliations

* Corresponding authors

^a College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, P. R. China
E-mail: qzhang@hznu.edu.cn, hyqiu@hznu.edu.cn

^b The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, State Key Laboratory and Institute of Elemento Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin, China

Abstract

A new A₂–π–A₁–π–A₂-type small molecule denoted as BDD–IN was synthesized employing a strong electron-withdrawing unit, 3-bis(4-(2-ethylhexyl)-thiophen-2-yl)-5,7-bis(2-ethylhexyl)benzo[1,2:4,5-c′]-dithiophene-4,8-dione (BDD) as the central acceptor unit (A₁), thiophene-alkoxy benzene-thiophene as the π-bridge, and indenedione (IN) as the end-capped unit (A₂). An optimal power conversion efficiency (PCE) of 8.70% with a high open-circuit voltage (V_oc) of 0.965 V and a high fill factor (FF) of 72.3% was achieved.

Journal of Materials Chemistry C

An A₂–π–A₁–π–A₂-type small molecule donor for high-performance organic solar cells†

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An A₂–π–A₁–π–A₂-type small molecule donor for high-performance organic solar cells

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Journal of Materials Chemistry C