Ligand-free Cs2PdBr6 perovskite microcrystals with narrow bandgap and high photoelectrochemical performance in aqueous solution  

作　　者：Yaling Chen Guanying Luo Luyao Xu Yu Yang Yunzhong Xu Jiahui Yu Wei Chen Huaping Peng 

机构地区：[1]Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province,Department of Pharmaceutical Analysis,Faculty of Pharmacy,Fujian Medical University,Fuzhou 350122,China

出　　处：《Advanced Sensor and Energy Materials》2024年第3期36-42,共7页先进传感器与能源材料（英文）

基　　金：funded by the National Natural Science Foundation of China(22374021);the Joint Funds for the Innovation of Science and Technology of Fujian Province(2021Y9010);Zong Lian Plan Talent Support Project of the Fujian Medical University(XN240006);Program for Fujian Youth Talent Support Project(2019B016);Program for Fujian Top-notch Innovative Personnel(Fujian Commission Talent[2018]No.5).

摘　　要：The exploration of efficient lead-free perovskite photoelectric active materials to develop high-performance photoelectrochemical(PEC)systems in aqueous solution is crucial to expand their PEC applications.Herein,we successfully constructed a high-performance PEC platform using ligand-free perovskite Cs2PdBr6 microcrystals(MCs)as the photoactive substance.The Cs2PdBr6 MCs showed narrow bandgap,wide absorption range,high electronic mobility and good stability in aqueous solutions.Particularly,the Cs2PdBr6 MCs exhibited an excellent photoresponse,the photocurrent density could reach as high as 98μA/cm^(2)under 10.18 mW/cm^(2)light irradiation in the absence of other electron acceptors.In addition of the extremely wide range of response wavelength,wide pH range and accelerated interfacial carrier transfer,the Cs2PdBr6 MCs demonstrated the significant potential of photocathode active material for applications in PEC sensors and optoelectronic devices.Therefore,this work indicates that Cs2PdBr6 MCs design is a highly efficient way to solve the intrinsic issues of perovskite material,predicting a promising strategy for high performance PEC application in aqueous ambience.

关 键 词：Lead-free perovskite Cs2PdBr6 microcrystals Narrow bandgap PHOTOELECTROCHEMISTRY Aqueous solution 

分 类 号：O61[理学—无机化学]