Enhanced charge transport in 2D inorganic molecular crystals constructed with charge-delocalized molecules  

作　　者：Jie Wu Yan Zeng Xin Feng Yiran Ma Pengyu Li Chunlei Li Teng Liu Shenghong Liu Yinghe Zhao Huiqiao Li Lang Jiang Yuanping Yi Tianyou Zhai 

机构地区：[1]State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan,the People's Republic of China [2]Hubei Yangtze Memory Laboratories,Wuhan,the People's Republic of China [3]Beijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Organic Solids,Institute of Chemistry Chinese Academy of Sciences,Beijing,the People's Republic of China

出　　处：《InfoMat》2024年第7期90-101,共12页信息材料（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.U21A2069,21825103);the China Postdoctoral Science Foundation(Grant No.2021M691108).

摘　　要：Outstanding charge transport in molecular crystals is of great importance in modern electronics and optoelectronics.The widely adopted strategies to enhance charge transport,such as restraining intermolecular vibration,are mostly limited to organic molecules,which are nearly inoperative in 2D inor-ganic molecular crystals currently.In this contribution,charge transport in 2D inorganic molecular crystals is improved by integrating charge-delocalized Se8 rings as building blocks,where the delocalized electrons on Se8 rings lift the intermolecular orbitals overlap,offering efficient charge transfer channels.Besides,α-Se flakes composed of charge-delocalized Se8 rings possess small exciton binding energy.Benefitting from these,α-Se flake exhibits excellent photodetection performance with an ultrafast response rate(�5μs)and a high detectivity of 1.08�1011 Jones.These findings contribute to a deeper under-standing of the charge transport of 2D inorganic molecular crystals composed of electron-delocalized inorganic molecules and pave the way for their poten-tial application in optoelectronics.

关 键 词：charge transport delocalized inorganic molecular crystals TWO-DIMENSIONAL 

分 类 号：O62[理学—有机化学]