Atomically precise metal-chalcogenide semiconductor molecular nanoclusters with high dispersibility:Designed synthesis and intracluster photocarrier dynamics  

作　　者：Jiaxu Zhang Chaochao Qin Yeshuang Zhong Xiang Wang Wei Wang Dandan Hu Xiaoshuang Liu Chaozhuang Xue Rui Zhou Lei Shen Yinglin Song Dingguo Xu Zhien Lin Jun Guo Haifeng Su Dong-Sheng Li Tao Wu 

机构地区：[1]College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China [2]Henan Key Laboratory of Infrared Materials&Spectrum Measures and Applications,School of Physics,Henan Normal Universit,Xinxiang 453007,China [3]College of Chemistry,Sichuan Univrsity,Chengdu 610064,China [4]School of Physical Science and Technology,Soochow University,Suzhou 215123,China [5]Testing&Analysis Centre,Soochow University,Suzhou 215123,China [6]College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China [7]College of Materials and Chemical Engineering Hubei Provincial Collaborative Innovation Centre for New Energy Microgrid,Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials,China Three Gorges University,Yichang 443002,China

出　　处：《Nano Research》2020年第10期2828-2836,共9页纳米研究（英文版）

基　　金：The authors acknowledge financial support from the National Natural Science Foundation of China(Nos.21671142,11804084 and 21875150);the Jiangsu Province Natural Science Fund for Distinguished Young Scholars(No.BK20160006);the 111 Project(No.D20015);the Project of Scientific and Technologic Infrastructure of Suzhou(No.SZS201905);the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD).The authors also thank Dr.D.C.Ma at Analytical and Testing Center,Sichuan University for technical help with the Material Studio calculations.

摘　　要：A comprehensive understanding of excited-state dynamics of semiconductor quantum dots or nanomaterials at the atomic or molecular level is of scientific importance.Pure inorganic(or non-covalently protected)seimiconductor molecular nanoclusters with atomically precise structure are contributive to establish accurate correlation of excited-state dynamics with their composition/structure,however,the related studies are almost blank because of unresolved solvent dispersion issue.Herein,we designedly created the largest discrete chalcogenide seimiconductor molecular nanoclusters(denoted P2-CuMSnS,M=In or/and Ga)with great dispersibility,and revealed an interesting intracluster“core–shell”charge transfer relaxation dynamics.A systematic red shift in absorption spectra with the gradual substitution of In by Ga was experimentally and computationally investigated,and femtosecond transient absorption measurements further manifested there were three ultrafast processes in excited-state dynamics of P2 nanoclusters with the corresponding amplitudes directed by composition variation.Current results hold the great promise of the solution-processible applications of semiconductor-NC-based quantum dots and facilitate the development of atomically precise nano-chemistry.

关 键 词：SEMICONDUCTOR NANOCLUSTERS photocarrier dynamics charge transfer atomically precise 

分 类 号：O64[理学—物理化学]