Metal sulfide nanomaterials have become research hotspots in frontier fields such as solar energy conversion, photovoltaic devices, and catalysis due to their excellent photoelectric properties. Through the design of metal sulfide nanostructures and the controlled synthesis and assembly of thin-film materials, it can play a greater role in applications such as solar energy utilization and optoelectronic integrated devices.
The research team led by Jia Junhong, a researcher at the State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, has made a series of breakthroughs and important progress in the design, preparation and performance research of metal sulfide nanomaterials and functional films. They use chemical bath deposition combined with self-assembly technology to control a series of metal sulfides such as CuxS, CdS, In2S3 and Bi2S3 nanocrystalline films on single crystal silicon and glass. At the same time, using self-assembly and ultraviolet lithography, a complete and ordered sulfide patterned film was prepared. The effect of pattern characteristics on the optical and photoelectric properties of the film was studied, and the formation and growth mechanism of the sulfide deposited film was revealed.
The research results show that the self-assembled film can be used as an effective template to control the crystal axis orientation, crystal type selection and surface morphology of the metal sulfide nanomaterials. The prepared film has stable photocurrent and sensitive photoelectric response characteristics; The optical and photoelectric performance of the film can be controlled by adjusting the pattern size. The characteristics of this patterned functional film have broad application prospects in the fields of micro-optics, sensors and solar cells.
This research work was supported by the "Hundred Talents Program" of the Chinese Academy of Sciences and the National Natural Science Foundation of China. The research results were recently published in CrystEngComm (2012, 14, 3433), and Journal of Colloid and Interface Science (2009, 332, 32–38; 2011, 356, 726-733.), ACS Appl. Mater. Interfaces (2010, 2 , 3467–3472), Applied Surface Science (2010, 256, 7316; 2011, 258, 649-656).
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