Side-chain symmetry-breaking strategy on porphyrin donors enables high-efficiency binary all-small-molecule organic solar cells  

作　　者：Wentao Zou Xu Zhang Haojiang Shen Wenqing Zhang Xinyue Jiang Liaohui Ni Can Shen Longlong Geng Xiaotao Hao Yingguo Yang Xunchang Wang Renqiang Yang Yanna Sun Yuanyuan Kan Ke Gao 

机构地区：[1]Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion,Science Center for Material Creation and Energy Conversion,Institute of Frontier Chemistry,School of Chemistry and Chemical Engineering,Shandong University,Qingdao,China [2]School of Physics,State Key Laboratory of Crystal Materials,Shandong University,Jinan,China [3]Shandong Provincial Key Laboratory of Monocrystalline Silicon Semiconductor Materials and Technology,College of Chemistry and Chemical Engineering,Dezhou University,Dezhou,China [4]School of Microelectronics,Fudan University,Shanghai,China [5]Key Laboratory of Optoelectronic Chemical Materials and Devices(Ministry of Education),School of Optoelectronic Materials&Technology,Jianghan University,Wuhan,China

出　　处：《SusMat》2024年第3期204-213,共10页可持续发展材料（英文）

基　　金：National Key Research and Development Program of China,Grant/Award Number:2022YFB4200400;National Natural Science Foundation of China,Grant/Award Numbers:52172048,52103221,22205130,12175298;Shandong Provincial Natural Science Foundation,Grant/Award Numbers:ZR2021QB024,ZR2021QB179,ZR2021ZD06,2023HWYQ-026;Qingdao New Energy Shandong Laboratory Open Project,Grant/Award Number:QNESL OP 202309;Guangdong Natural Science Foundation of China,Grant/Award Numbers:2023A1515012323,2023A1515010943,2022A1515110643,2024A1515010023;Fundamental Research Funds of Shandong University。

摘　　要：Side-chain symmetry-breaking strategy plays an important role in developing photovoltaic materials for high-efficiency all-small-molecule organic solar cells(ASM OSCs).However,the power conversion efficiencies(PCEs)of ASM OSCs still lag behind their polymer-based counterparts,which can be attributed to the difficulties in achieving favorable morphology.Herein,two asymmetric porphyrin-based donors named DAPor-DPP and DDPor-DPP were synthesized,presenting stronger intermolecular interaction and closer molecular stacking compared to the symmetric ZnP-TEH.The DAPor-DPP:6TIC blend afforded a favorablemorphologywith nanoscale phase separation and more ordered molecular packing,thus achievingmore efficient charge transportation and suppressed charge recombination.Consequently,the DAPor-DPP:6TIC-based device exhibited superior photovoltaic parameters,yielding a champion PCE of 16.62%higher than that of the DDPor-DPP-based device(14.96%).To our knowledge,16.62%can be ranked as one of the highest PCE values among the binary ASM OSC filed.Thiswork provides a prospective approach to address the challenge ofASM OSCs in improving film morphology and further achieving high efficiency via side-chain symmetry-breaking strategy,exhibiting great potential in constructing efficient ASM OSCs.

关 键 词：all-small-molecule organic solar cells asymmetric side-chain engineering power conversion efficiency small molecule donors 

分 类 号：O62[理学—有机化学]