Tetrabenzotriazacorrole and its derivatives as undopea hole transporting materials for perovskite solar cells:Synthesis,device fabrication,and device performance  

作　　者：Xian-Fu Zhang Chang Liu Jianchang Wu Baomin Xu 

机构地区：[1]Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,Guangdong,China [2]Institute of Applied Photochemistry,Hebei Normal University of Science and Technology,Qinhuangdao 066004,Hebei,China [3]Shenzhen Engineering Research and Development Center for Flexible Solar Cells,Southern University of Science and Technology,Shenzhen 518055,Guangdong,China

出　　处：《Journal of Energy Chemistry》2020年第4期139-147,共9页能源化学（英文版）

基　　金：the financial support from the National Key Research and Development Project funding from the Ministry of Science and Technology of China(Grants nos.2016YFA0202400 and 2016YFA0202404);the Peacock Team Project funding from Shenzhen Science and Technology Innovation Committee(Grant no.KQTD2015033110182370);the Shenzhen Engineering R&D Center for Flexible Solar Cells project funding from Shenzhen Development and Reform Committee(Grant no.2019-126);Hebei Provincial Hundred Talents Plan(Contract E2013100005)。

摘　　要：Phosphorous tetrabenzotriazacorrole(TBC)and its two soluble derivatives(TBC-1 and TBC-2)were synthesized and used for the first time as undoped hole transporting materials(HTMs)in MAPbI3 perovskite solar cells(PSCs).Their performance in PSCs was measured and compared with that of SpiroOMeTAD and phthalocyanine precursor.The fundamental properties related to HTMs are also examined.These novel HTMs are easily prepared,cost-effective,and solution processable.The materials exhibited much higher hole transport mobility and broader light absorption than pristine Spiro-OMeTAD and phthalocyanine precursor.They can work efficiently in the absence of any dopant for devices composed of FTO/cp-TiO2/mp-TiO2/MAPbI3/HTM/Au.The undoped mesoscopic solar cell devices based on TBC exhibited a promising power conversion efficiency(PCE)of up to 16.2%(measured at 100 mWcm2 illumination,AM 1.5 G),together with good long-term stability under ambient conditions.This PCE of 16.2%observed using TBC is remarkably higher than the 11.2%observed using undoped Spiro-OMeTAD and also much better than the 8.70%observed using its phthalocyanine precursor.As to substitution effects,α-substituted TBC-1 was found to be a better HTM thanβ-substituted TBC-2(PCE 11.4%)and unsubstituted TBC-3(PCE 6.81%)under the same conditions.These results provide the basis for further exploiting TBC compounds as a new type of low-cost and effective HTM for PSCs.Phosphorous tetrabenzotriazacorrole （TBC） and its two soluble derivatives （TBC-1 and TBC-2） were synthesized and used for the first time as undoped hole transporting materials （HTMs） in MAPbI3 perovskite solar cells （PSCs）.Their performance in PSCs was measured and compared with that of SpiroOMeTAD and phthalocyanine precursor.The fundamental properties related to HTMs are also examined.These novel HTMs are easily prepared,cost-effective,and solution processable.The materials exhibited much higher hole transport mobility and broader light absorption than pristine Spiro-OMeTAD and phthalocyanine precursor.They can work efficiently in the absence of any dopant for devices composed of FTO/cp-TiO2/mp-TiO2/MAPbI3/HTM/Au.The undoped mesoscopic solar cell devices based on TBC exhibited a promising power conversion efficiency （PCE） of up to 16.2%（measured at 100 mWcm2 illumination,AM 1.5 G）,together with good long-term stability under ambient conditions.This PCE of 16.2%observed using TBC is remarkably higher than the 11.2%observed using undoped Spiro-OMeTAD and also much better than the 8.70%observed using its phthalocyanine precursor.As to substitution effects,α-substituted TBC-1 was found to be a better HTM thanβ-substituted TBC-2 （PCE 11.4%） and unsubstituted TBC-3 （PCE 6.81%） under the same conditions.These results provide the basis for further exploiting TBC compounds as a new type of low-cost and effective HTM for PSCs.

关 键 词：PEROVSKITE SOLAR cell HOLE transporting material Tetrabenzotriazacorrole PHTHALOCYANINE 

分 类 号：O626[理学—有机化学] TM914.4[理学—化学]