Most of the recent organic solar cells(OSCs)with top-of-the-line efficiencies are processed from organic solvents with a high vapor pressure such as CF in nitrogen-filled glovebox,which is not feasible for large-area manufacturing.Herein,we cast active layers with both aromatic hydrocarbon solvents and halogenated solvents without any solvent additive or post-treatment,as well as interlayers with water and methanol in air(35％relative humidity)for efficient OSCs,except cathode electrode's evaporation is in vacuum.Compared to the PM6:Y6 system that is processed from CF,the PM6:BTP-ClBr2 system demonstrates good efficiency of 16.28％processed from CB and the device based on PM6:BTP-4Cl achieves 16.33％using TMB as its solvent for the active layer.These are among the highest efficiencies for CB-and TMB-processed binary OSCs to date.The molecular packing and phase separation length scales of each combination depend strongly on the solvent,and the overall morphology is the result of the interplay between solvent evaporation(kinetics)and materials miscibility(thermodynamics).Different solvents are required to realize the optimal morphology due to the different miscibility between the donor and acceptor.Finally,17.36％efficiency was achieved by incorporating PC71BM for TMB-processed devices.Our result provides insights into the effect of processing solvent and shows the potential of realizing high-performance OSCs in conditions relevant for industrial fabrication.

Ruijie Ma;Tao Yang;Yiqun Xiao;Tao Liu;Guangye Zhang;Zhenghui Luo;Gang Li;Xinhui Lu;He Yan;Bo Tang

College of Chemistry,Chemical Engineering and Materials Science,Key Laboratory of Molecular and Nano Probes,Ministry of Education,Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong,Institute of Materials and Clean Energy,Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals,Shandong Normal University,Jinan 250014,China;Department of Chemistry,Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials,Energy Institute and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration&Reconstruction,Hong Kong University of Science and Technology,Clear Water Bay,Kowloon,Hong Kong,China;College of New Materials and New Energies,Shenzhen Technology University,Shenzhen 518118 China;Department of Physics,Chinese University of Hong Kong,New Territories Hong Kong,China;Hong Kong University of Science and Technology-Shenzhen Research Institute,No.9 Yuexing first RD,Hi-tech Park,Nanshan,Shenzhen 518057,China;Institute of Polymer Optoelectronic Materials and Devices,State Key Laboratory of Luminescent Materials and Devices,South China University of Technology(SCUT),Guangzhou 510640,China

能源与环境材料（英文）

[1]Ruijie Ma;Tao Yang;Yiqun Xiao;Tao Liu;Guangye Zhang;Zhenghui Luo;Gang Li;Xinhui Lu;He Yan;Bo Tang-.Air-Processed Efficient Organic Solar Cells from Aromatic Hydrocarbon Solvent without Solvent Additive or Post-Treatment:Insights into Solvent Effect on Morphology)[J].能源与环境材料（英文）,2022(03):977-985

glovebox,ClBr2

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