Efficient ternary non-fullerene polymer solar cells with PCE of 11.92% and FF of 76.5%

Miao Zhang; Wei Gao; Fujun Zhang; Yang Mi; Wenbin Wang; Qiaoshi An; Jian Wang; Xiaoling Ma; Jianli Miao; Zhenghao Hu; Xinfeng Liu; Jian Zhang; Chuluo Yang

doi:10.1039/C8EE00215K

Efficient ternary non-fullerene polymer solar cells with PCE of 11.92% and FF of 76.5%†

Miao Zhang,^a Wei Gao,^b Fujun Zhang,

*^a Yang Mi,^c Wenbin Wang,^a Qiaoshi An,^a Jian Wang,^d Xiaoling Ma,^a Jianli Miao,^a Zhenghao Hu,^a Xinfeng Liu,

^c Jian Zhang^e and Chuluo Yang

*^b

Author affiliations

* Corresponding authors

^a Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing, China
E-mail: fjzhang@bjtu.edu.cn

^b Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan 430072, China
E-mail: clyang@whu.edu.cn

^c Division of Nanophotonics, CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China

^d College of Physics and Electronic Engineering, Taishan University, Taian 271021, China

^e Guangxi Key Laboratory of Information Materials, School of Material Science and Technology, Guilin University of Electronic Technology, Guilin 541004, China

Abstract

Non-fullerene polymer solar cells (PSCs) attract more attention due to the constantly refreshed power conversion efficiency (PCE) based on the versatile non-fullerene acceptors. In this work, PCEs of 10.51% and 11.02% were obtained for two kinds of non-fullerene PSC with IDT6CN-M or ITCPTC as the acceptor and PBDB-T as the donor. ITCPTC has a relatively narrow bandgap and a high absorption coefficient compared with IDT6CN-M, which explains well the relatively large short-circuit current density of 17.44 mA cm⁻² for the ITCPTC based binary PSCs. Meanwhile, the IDT6CN-M based binary PSCs exhibit a relatively high fill factor (FF) of 75.3% and an open-circuit voltage of 0.915 V. A PCE of 11.92% and a FF of 76.5% were achieved for the ternary PSCs with 60 wt% ITCPTC content in the acceptors, which should be attributed to the enhanced photon harvesting and their good compatibility for a synergistic improvement of exciton utilization and charge transport in the ternary active layers. The FF of 76.5% is among the top values of ternary non-fullerene PSCs.

This article is part of the themed collection: 2018 Energy and Environmental Science HOT Articles

Energy & Environmental Science

Efficient ternary non-fullerene polymer solar cells with PCE of 11.92% and FF of 76.5%†

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Efficient ternary non-fullerene polymer solar cells with PCE of 11.92% and FF of 76.5%

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