Unprecedented short-circuit current density and efficiency of vacuum-deposited organic solar cells based on 8H-thieno[2,3:4,5]thieno[3,2-b]thieno[2,3-d]pyrrole  

基于三噻吩并吡咯的新型小分子给体实现高效真空蒸镀有机太阳能电池

作　　者：Bin-Wen Chen Ming-Wei An Kang Wang Sang Young Jeong Xu Wang Zhen-Lin Qiu Kun Cao Shan-Yu Zheng Lu Wang Han Young Woo Da-Qin Yun Lin-Long Deng Su-Yuan Xie Lan-Sun Zheng 陈斌文;安明伟;王康;Sang Young Jeong;王旭;邱振霖;曹琨;郑珊瑜;王璐;Han Young Woo;云大钦;邓林龙;谢素原;郑兰荪

机构地区：[1]State Key Laboratory of Physical Chemistry of Solid Surfaces,Collaborative Innovation Center of Chemistry for Energy Materials,Department of Chemistry,College of Chemistry and Chemical Engineering,Pen-Tung Sah Institute of Micro-Nano Science and Technology,Xiamen University,Xiamen 361005,China [2]Strait Institute of Flexible Electronics(SIFE,Future Technologies),Fujian Normal University and Strait Laboratory of Flexible Electronics(SLoFE),Fuzhou 350000,China [3]Department of Chemistry,Korea University,Seoul,02841,Republic of Korea [4]College of Energy,Xiamen University,Xiamen 361005,China

出　　处：《Science Bulletin》2025年第6期897-904,共8页科学通报(英文版)

基　　金：supported by the National Natural Science Foundation of China(92361303,92061204,and 52203228);the Natural Science Foundation of Guangdong Province of China(2023A1515011916);the China Postdoctoral Science Foundation(2022M712658);Han Young Woo acknowledges the financial support from the National Research Foundation of Korea(2019R1A6A1A11044070,and RS-2024-00334832).

摘　　要：Despite the many advantages for industrial mass production,vacuum-deposited organic solar cells(OSCs)suffer from low efficiency,primarily due to the limited molecular library of small-molecule donor and acceptor materials,which remains a significant challenge.Herein,two donor–acceptor-acceptor(D-A-A)-configured small-molecule donors,named TTBTDC and TTBTDC-F were synthesized,using 8H-thieno[2′,3′:4,5]thieno[3,2-b]thieno[2,3-d]pyrrole(TTP)as a new fused-ring donor unit.Benefiting from the strong electron-donating ability of the TTP moiety and the adoption of the D-A-A molecular configuration,these molecules exhibited strong visible and near-infrared absorption as well as deep-lying highest occupied molecular orbital(HOMO)energy levels.Consequently,OSCs based on TTBTDC achieved an unprecedented power conversion efficiency(PCE)of 10.28%(certified value of 10.05%)with a short-circuit current density(J_(sc))up to 17.78 mA cm^(−2),representing the highest PCE and J_(sc)values reported to date for vacuum-deposited OSCs.In contrast,OSCs based on TTBTDC-F exhibited an inferior PCE of 8%with slightly higher open-circuit voltage(V_(oc))but lower J_(sc).By systematically investigating the relationships between molecular structure and properties,we found that the high performance of TTBTDC devices results from extended absorption up to 900 nm,stronger cofacial antiparallelπ-πinteractions,and superior charge transport with suppressed recombination.Besides,both TTBTDC and TTBTDC-F devices exhibited excellent device stabilities,including storage stability,thermal stability,and photo-stability.This work demonstrates the great potential of TTP as a building block for constructing small-molecule donors and sheds light on the molecular design of small-molecule donors for high-efficiency and stable vacuum-deposited OSCs.

关 键 词：Organic solar cells Vacuum deposition Small-molecule donor D-A-A configuration 8H-Thieno[2 3:4 5]thieno[3 2-b]thieno[2 3-d]pyrrole 

分 类 号：TM914.4[电气工程—电力电子与电力传动]