Thermally stable poly(3-hexylthiophene):Nonfullerene solar cells with efficiency breaking 10%  

作　　者：Mengyuan Gao Yang Liu Kaihu Xian Zhongxiang Peng Kangkang Zhou Junwei Liu Saimeng Li Fei Xie Wenchao Zhao Jidong Zhang Xuechen Jiao Long Ye 

机构地区：[1]School of Materials Science and Engineering,Tianjin Key Laboratory of Molecular Optoelectronic Sciences,Tianjin University,Tianjin,China [2]National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei,China [3]Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,College of Materials Science and Engineering,Nanjing Forestry University,Nanjing,China [4]State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun,China

出　　处：《Aggregate》2022年第5期205-216,共12页聚集体（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Number:52073207;Special Fund for Graduate Education of Tianjin University,Grant/Award Number:C1-2021-008。

摘　　要：Solar cells featuring polythiophenes as donors are one of the optoelectronic devices that hold notable promises for commercial application,profiting from the lowest synthetic complexity and excellent scalability.However,the complex phase behaviors of polythiophenes and their blends put constraints on modulating electrical performance and thus realizing stable performance under thermal stress.In this contribution,we present a multi-technique approach that combines calorimetry,scattering,spectroscopy,and microscopy to thoroughly probe the thermodynamic mixing,thermal properties of materials,the evolution of nanoscale domain structure,and device performance of poly(3-hexylthiophene)(P3HT)with a range of nonfullerene acceptors(NFAs)such as ITIC,IDTBR,and ZY-4Cl.Accordingly,two blending guidelines are established for matching these popular NFAs with P3HT to enable highly efficient and thermally stable cells.First,blend systems with weak vitrification and hypo-miscibility are excellent candidates for efficient solar cells.Furthermore,high thermal stability can be achieved by selecting NFAs with diffusion-limited crystallization.The P3HT:ZY-4Cl blend was found to endow the best performance of over 10%efficiency and an exceptionally high T_(80) lifetime of>6000 h under continuous thermal annealing,which are among the highest values for P3HT-based solar cells.This realization of high thermal stability and efficiency demonstrates the remarkable potentials of simple polythiophene:nonfullerene pairs in electronic applications.

关 键 词：multi-technique approach organic solar cells phase separation POLYTHIOPHENE thermal stability 

分 类 号：TM914.4[电气工程—电力电子与电力传动]