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Semiconductor materials, platinum sulfide photoelectric properties research new breakthroughs

The reporter learned from the School of Materials and Energy of Yunnan University on June 20 that Yang Peng and Wan After continuous research and development, the Yanfen team has solved a series of problems in the synthesis of graphene-like materials with a large area and uniformly few layers of platinum sulfide and its structure and physical properties. It provides support for the development of more abundant application scenarios and at the same time to the end of the mole The law injects new hope and provides semiconductor materials with great potential.

“After more than half a century of development, microelectronics technology has brought great convenience to mankind. Semiconductor as the foundation of the information industry Materials are the cornerstones of industries such as microelectronics, optoelectronics, and solar energy, and are of great significance to the development of China’s industry, information, and national defense.” Associate professor Yang Peng of Yunnan University introduced that graphene, as a typical two-dimensional nanomaterial, possesses chemical, optical, A series of excellent electrical and mechanical properties have been widely used, but graphene has shortcomings such as zero band gap and low light absorption, which limit its wider application. At the same time, graphene-like materials emerged. As a typical representative of graphene-like materials, transition metal chalcogenides not only have a layered structure similar to the van der Waals force of graphene, but also have excellent optical, electrical, and magnetic properties, which can better make up for the shortcomings of graphene. Greatly broaden the practical application range of semiconductor materials.

Platinum sulfide based on precious metals, as an important member of the transition metal chalcogenide family, has a wide and adjustable band gap,”optical”Materials” have strong interaction and good stability. They are potential candidates for semiconductor devices and bring new development opportunities to the field of modern electronic technology. However, the common problems faced by two-dimensional materials today, such as the small area of ​​the material and the difficulty of transfer, have formed a certain impact on the development of the semiconductor industry.

In response to these problems, Yang Peng and Wan Yanfen, School of Materials and Energy, Yunnan University, Yunnan Key Laboratory of Micro-Nano Materials and Technology The team used a combination of physical vapor deposition and chemical vapor deposition to prepare a large-area, small-layer, uniform platinum sulfide material at the square centimeter level and characterized the related physical properties under appropriate temperature and pressure conditions.

This research result provides new ideas and technical foundation for the development of large-area electronic devices, and expands transition metal sulfur in the future The application range of the family compounds provides an important reference. Relevant research results were published in the internationally renowned materials academic journal”Modern Materials Physics”.