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Accurate Control of VS 2 Nanosheets for Coexisting High Photoluminescence and Photothermal Conversion Efficiency
Author(s) -
Zhou Yannan,
Xu Qun,
Ge Tianpei,
Zheng Xiaoli,
Zhang Li,
Yan Pengfei
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201912756
Subject(s) - photoluminescence , amorphous solid , photothermal therapy , materials science , absorption (acoustics) , optoelectronics , nanotechnology , chemistry , crystallography , composite material
Abstract In two‐dimensional (2D) amorphous nanosheets, the electron–phonon coupling triggered by localization of the electronic state as well as multiple‐scattering feature make it exhibit excellent performance in optical science. VS 2 nanosheets, especially single‐layer nanosheets with controllable electronic structure and intrinsic optical properties, have rarely been reported owing to the limited preparation methods. Now, a controllable and feasible switching method is used to fabricate 2D amorphous VS 2 and partial crystallized 2D VO 2 (D) nanosheets by altering the pressure and temperature of supercritical CO 2 precisely. Thanks to the strong carrier localization and the quantum confinement, the unique 2D amorphous structures exhibit full band absorption, strong photoluminescence, and outstanding photothermal conversion efficiency.