Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)has been widely adopted as hole transport material(HTM)in inverted perovskite solar cells(PSCs),due to high optical trans-parency,good mechanical flexibility,and high thermal stability;however,its acidity and hygroscopicity inevitably.hamper the long-term stability of the PSCs and its energy level does not match well with perovskite materials with a relatively low open-circuit voltage.In this work,p-type delafossite CuCrO2 nanoparticles synthesized through hydrothermal method was employed as an alternative HTM for triple cation perovskite[(FAPbI3)0.87(MAPbBr3)0.13]0.92(CsPb13)0.08(possessing better photovoltaic performance and stability than conventional CH3NH3Pb13)based inverted PSCs.The average open-circuit voltage of PSCs increases from 908 mV of the devices with PEDOT:PSS HTM to 1020 mV of the devices with CuCrO2 HTM.Ultraviolet photoemission spectroscopy demonstrates the energy band alignment between CuCrO2 and perovskite is better than that between PEDOT:PSS and perovskite,the electrochemical impedance spectroscopy indicates CuCrO2-based PSCs exhibit larger recombination resis-tance and longer charge carrier lifetime than PEDOT:PSS-based PSCs,which contributes to the high Voc of CuCrO2 HTM-based PSCs.

Xue-yan Shan;Bin Tong;Shi-mao Wang;Xiao Zhao;Wei-wei Dong;Gang Meng;Zan-hong Deng;Jing-zhen Shao;Ru-hua Tao;Xiao-dong Fang

Anhui Provincial Key Laboratory of Photonic Devices and Materials,Anhui Institute of Optics and Fine Mechanics,Key Lab of Photovoltaic and Energy Conservation Materials,Hefei Institutes of Phys-ical Science,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China;Advanced Laser Technology Laboratory of Anhui Province,Hefei 230037,China;School of Environmental Science and Optoelectronic Technology University of Science and Technol-ogy of China,Hefei 230026,China;School of Materials and Chemical Engineering,Anhui Jianzhu University,Hefei 230601,China;College of New Materials and New Energies,Shenzhen Technology University,Shenzhen 518118,China

化学物理学报（英文版）

[1]Xue-yan Shan;Bin Tong;Shi-mao Wang;Xiao Zhao;Wei-wei Dong;Gang Meng;Zan-hong Deng;Jing-zhen Shao;Ru-hua Tao;Xiao-dong Fang-.Enhanced Photovoltage for Inverted Perovskite Solar Cells Using Delafossite CuCrO2 Hole Transport Material)[J].化学物理学报（英文版）,2022(06):957-964

Photovoltage,Delafossite,styrenesulfonate,delafossite,CsPb13,CH3NH3Pb13

Enhanced,Inverted,Perovskite,Solar,Cells,Using,CuCrO2,Hole,Transport,Material,Poly,ethylenedioxythiophene,poly,PEDOT,PSS,has,been,widely,adopted,hole,transport,HTM,inverted,perovskite,solar,cells,PSCs,due,high,optical,parency,good,mechanical,flexibility,stability,however,its,acidity,hygroscopicity,inevitably,hamper,term,energy,level,does,not,match,well,materials,relatively,low,open,circuit,this,work,type,nanoparticles,synthesized,through,hydrothermal,method,was,employed,alternative,triple,cation,FAPbI3,MAPbBr3,possessing,better,photovoltaic,performance,than,conventional,average,increases,from,mV,devices,Ultraviolet,photoemission,spectroscopy,demonstrates,band,alignment,between,that,electrochemical,impedance,indicates,exhibit,larger,recombination,resis,tance,longer,charge,carrier,lifetime,which,contributes,Voc

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