Exploring ternary organic photovoltaics for the reduced nonradiative recombination and improved efficiency over 17.23%with a simple large-bandgap small molecular third component

作     者：Huanran Feng Yvjie Dai Lihao Guo Di Wang Hao Dong Zhihui Liu Lu Zhang Yvjin Zhu Chen Su Yongsheng Chen Weiwei Wu Huanran Feng;Yvjie Dai;Lihao Guo;Di Wang;Hao Dong;Zhihui Liu;Lu Zhang;Yvjin Zhu;Chen Su;Yongsheng Chen;Weiwei Wu

作者机构：School of Advanced Materials and NanotechnologyInterdisciplinary Research Center of Smart SensorsXidian UniversityShaanxi 710126China Intelligent Perception Research InstituteZhejiang LabHangzhou 311100China State Key Laboratory and Institute of Elemento-Organic ChemistryKey Laboratory of Functional Polymer MaterialsCollege of ChemistryNankai UniversityTianjin 300071China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2022年第15卷第4期

页      面：3222-3229页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.22005234 and 61904134) Zhejiang Lab(No.2021MC0AB02) 

主　　题：organic photovoltaic ternary bulk heterojunction nonradiative recombination simple small molecule phase separation 

摘      要：Ternary strategy is one of the most effective methods to further boost the power conversion efficiency(PCE)of organic photovoltaic cells(OPVs).In terms of high-efficiency PM6:Y6 binary systems,there is still room to further reduce energy_(loss)(E_(loss))through regulating molecular packing and aggregation by introducing a third component in the construction of ternary *** we introduce a simple molecule BR1 based on an acceptor-donor-acceptor(A-D-A)structure with a wide bandgap and high crystallinity into PM6:Y6-based *** is proved that BR1 can be selectively dispersed into the donor phase in the PM6:Y6 and reduce disorder in the ternary blends,thus resulting in lower E_(loss,non-rad)and E_(loss).Furthermore,the mechanism study reveals well-develop phase separation morphology and complemented absorption spectra in the ternary blends,leading to higher charge mobility,suppressed recombination,which concurrently contributes to the significantly improved PCE of 17.23%for the ternary system compared with the binary ones(16.21%).This work provides an effective approach to improve the performance of the PM6:Y6-based OPVs by adopting a ternary strategy with a simple molecule as the third component.