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Updated: Dec 25, 2025

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
Published on: January 10, 2017
Efficient organic solar cells based on a new "Y-series" non-fullerene acceptor with an asymmetric
Fangfang Cai1, Can Zhu, Jun Yuan
1College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China. junyuan@csu.edu.cn yingpingzou@csu.edu.cn.
Abstract:
Herein, a new "Y-series" non-fullerene acceptor, Y21, bearing an asymmetric electron-deficient-core (DA'D) and fluorinated dicyanomethylene derivatives as flanking groups, was designed and synthesized for organic solar cell applications. Rather than being a perfect C2 symmetric traditional "Y-series" acceptor, Y21 possesses an electron-withdrawing unit (A') shifted from the center of DA'D, turning into an asymmetric molecular geometry. Photovoltaic devices based on PM6:Y21 can realize a high Jsc of 24.9 mA cm-2 and a PCE of 15.4%. Our work demonstrates a new way to tune the photoelectronic properties of the "Y-series" NFAs.
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