Low-cost polymer acceptors with noncovalently fused-ring backbones for efficient all-polymer solar cells  

作　　者：Xiaobin Gu Yanan Wei Xingzheng Liu Na Yu Laiyang Li Ziyang Han Jinhua Gao Congqi Li Zhixiang Wei Zheng Tang Xin Zhang Hui Huang 

机构地区：[1]College of Materials Science and Opto-Electronic Technology,Center of Materials Science and Optoelectronics Engineering,CAS Center for Excellence in Topological Quantum Computation,CAS Key Laboratory of Vacuum Physics,University of Chinese Academy of Sciences,Beijing 100049,China [2]Center for Advanced Low-dimension Materials,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China [3]CAS Key Laboratory of Nanosystem and Hierarchical Fabrication,CAS Center for Excellence in Nanoscience,National Center for Nanoscience and Technology,Beijing 100190,China

出　　处：《Science China Chemistry》2022年第5期926-933,共8页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (52103352, 52120105006, 21774130, 51925306);the National Key R&D Program of China (2018FYA 0305800);the Key Research Program of the Chinese Academy of Sciences (XDPB082);the Strategic Priority Research Program of Chinese Academy of Sciences (XDB28000000)。

摘　　要：The polymerization of fused-ring acceptors(FRAs) to afford their corresponding polymeric acceptors for high-performance all-polymer solar cells(all-PSCs) has achieved remarkable progress in the past few years.However,due to the high degree of synthetic complexity for the monomer,the high-cost of these polymeric acceptors may limit their commercial applications.Thus,it is urgent to develop inexpensive and high-performance polymeric acceptors for all-PSCs.Herein,two novel polymeric acceptors(PBTzO and PBTzO-2F) have been designed and synthesized by copolymerization of noncovalently fused ring acceptors(NFRAs),which were employed in all-PSCs for the first time.Upon introducing the “noncovalently conformational locks(NoCLs)” in the backbone and selective fluorination of the end-group,photophysical and electrical properties,and solidstate packing properties of the NFRAs have been rationally tuned.As a result,the PBDB-T:PBTzO-2F based devices presented an excellent power conversion efficiency(PCE) of 11.04%,much higher than that of PBTzO based ones due to the increased charge generation and extraction,improved hole transfer and carrier mobilities,and reduced energy loss.More importantly,PBTzO-2F exhibited a much lower synthetic complexity(SC) index and higher figure-of-merit(FOM) values than the high-performance fused-ring acceptor based polymer acceptors(FRA-PAs) due to the simpler structures and more effective synthesis.This contribution provided a novel idea to achieve low-cost and high-performance all-PSCs.

关 键 词：all-polymer solar cells low-cost polymer acceptors noncovalently fused-ring backbones figure-of-merit values 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TQ317[化学工程—高聚物工业]