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Nano Research

Article Title

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

Authors

Jiaxu Zhang, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
Chaochao Qin, Henan Key Laboratory of Infrared Materials & Spectrum Measures and Applications, School of Physics, Henan Normal University, Xinxiang 453007, China
Yeshuang Zhong, College of Chemistry, Sichuan University, Chengdu 610064, China
Xiang Wang, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
Wei Wang, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China College of Chemistry, Sichuan University, Chengdu 610064, China
Dandan Hu, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
Xiaoshuang Liu, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
Chaozhuang Xue, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
Rui Zhou, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
Lei Shen, School of Physical Science and Technology, Soochow University, Suzhou 215123, China
Yinglin Song, School of Physical Science and Technology, Soochow University, Suzhou 215123, China
Dingguo Xu, College of Chemistry, Sichuan University, Chengdu 610064, China
Zhien Lin, College of Chemistry, Sichuan University, Chengdu 610064, China
Jun Guo, Testing & Analysis Centre, Soochow University, Suzhou 215123, China
Haifeng Su, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
Dong-Sheng Li, 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
Tao Wu, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China

Keywords

semiconductor, nanoclusters, photocarrier dynamics, charge transfer, atomically precise

Abstract

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.

Graphical Abstract

Publisher

Tsinghua University Press

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