Mixed low-dimensional metal halide perovskite singlecrystal for low-detection-limit x-ray detection via orientedion migration  

作　　者：Xuefang Lu Richeng Lin Ying Ding Man Xia Wei Zheng Feng Huang 

机构地区：[1]Key Laboratory of Rare Earths,Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou,the People's Republic of China [2]School of Materials Science and Engineering,Fujian University of Technology,Fuzhou,the People's Republic of China [3]State Key Laboratory of Optoelectronic Materials and Technologies,School of Materials,Sun Yat-sen University,SenZhen,the People's Republic of China

出　　处：《InfoMat》2024年第10期31-43,共13页信息材料（英文）

基　　金：Research Projects of Ganjiang InnovationAcademy;National Key Research andDevelopment Program of China,Grant/Award Number: 2022YFB1902700;Natural Science Foundation of China,Grant/Award Number: 62374186;Guangdong Natural Science Funds forDistinguished Young Scholars,Grant/Award Number: 2021B1515020105;Youth Innovation Promotion AssociationCAS。

摘　　要：Low-dimensional metal halide perovskites exhibit exceptional photoelectronicproperties and intrinsic stability, positioning them as a promising class of semiconductormaterials for light-emitting devices and photodetectors. In thiswork, we present a millimeter-scale single crystal of mixed low-dimensional(one-dimensional–zero-dimensional [1D–0D]) organic lead iodide withwell-defined crystallinity. The fabricated single-crystal devices demonstratehigh-sensitivity photoresponse and x-ray detection performance. By spatiallyisolating organic molecules to form the mixed 1D–0D crystal structure, ionmigrations is effectively suppressed, resulting in a remarkable three orders ofmagnitude reduction in the dark current (56.4 pA @200 V) of the single-crystaldevices. Furthermore, by enhancing the background characteristics, weachieved an impressive low x-ray detection limit of 154.5 nGys^(-1) in the singlecrystaldevice. These findings highlight that the mixed 1D–0D organic leadiodide configuration efficiently controls ion migration within the crystal structure,offering a promising avenue for realizing high-performance perovskitebasedphotodetectors and x-ray detectors.

关 键 词：ion migration low-dimensional perovskite PHOTODETECTION x-ray detection 

分 类 号：O62[理学—有机化学]