Alloy-like ternary polymer solar cells with over 17.2% efficiency

Qiaoshi An; Jian Wang; Wei Gao; Xiaoling Ma; Zhenghao Hu; Jinhua Gao; Chunyu Xu; Minghui Hao; Xiaoli Zhang; Chuluo Yang; Fujun Zhang

doi:10.1016/j.scib.2020.01.012

Alloy-like ternary polymer solar cells with over 17.2% efficiency

Sci Bull (Beijing). 2020 Apr 15;65(7):538-545. doi: 10.1016/j.scib.2020.01.012. Epub 2020 Jan 16.

Authors

Qiaoshi An¹, Jian Wang², Wei Gao³, Xiaoling Ma⁴, Zhenghao Hu⁴, Jinhua Gao⁴, Chunyu Xu⁴, Minghui Hao⁵, Xiaoli Zhang⁶, Chuluo Yang⁷, Fujun Zhang⁸

Affiliations

¹ School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China.
² College of Physics and Electronic Engineering, Taishan University, Taian 271021, China.
³ Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China; Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan 400072, China.
⁴ School of Science, Beijing Jiaotong University, Beijing 100044, China.
⁵ Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China.
⁶ State Centre for International Cooperation on Designer Low-Carbon & Environmental Materials, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China.
⁷ Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China; Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan 400072, China. Electronic address: clyang@whu.edu.cn.
⁸ School of Science, Beijing Jiaotong University, Beijing 100044, China. Electronic address: fjzhang@bjtu.edu.cn.

PMID: 36659185
DOI: 10.1016/j.scib.2020.01.012

Abstract

Ternary strategy has been considered as an efficient method to achieve high performance polymer solar cells (PSCs). A power conversion efficiency (PCE) of 17.22% is achieved in the optimized ternary PSCs with 10 wt% MF1 in acceptors. The over 8% PCE improvement by employing ternary strategy is attributed to the simultaneously increased J_SC of 25.68 mA cm^-2, V_OC of 0.853 V and FF of 78.61% compared with Y6 based binary PSCs. The good compatibility of MF1 and Y6 can be confirmed from Raman mapping, contact angle, cyclic voltammetry and morphology, which is the prerequisite to form alloy-like state. Electron mobility in ternary active layers strongly depends on MF1 content in acceptors due to the different lowest unoccupied molecular orbital (LUMO) levels of Y6 and MF1, which can well explain the wave-like varied FF of ternary PSCs. The third-party certified PCE of 16.8% should be one of the highest values for single bulk heterojunction PSCs. This work provides sufficient references for selecting materials to achieve efficient ternary PSCs.

Keywords: Alloy-like model; Nonfullerene acceptor; Polymer solar cells; Ternary strategy.