Speaker: Rui Chen, Professor at the Southern University of Science and Technology

Inviter: Professor Tingchao He

Time: November 14, 2023, 2:00 PM

Location: Room 1101, Zhiyuan Building

Presentation Overview:

In the post-Moore era, photonic integration technology has become one of the primary means to break Moore's Law. The foundation of this research field lies in low-dimensional semiconductor materials. There are numerous surface defects in low-dimensional semiconductor materials, greatly affecting their optoelectronic properties. This presentation will first discuss the optical properties and stability enhancement strategies of several low-dimensional perovskite materials. In terms of growth strategies, methods such as A or B cation co-doping based on strain compensation and core-shell structures to suppress ion migration will be introduced. For post-processing, surface hydrophobic modification, structure self-healing induced by surface coating, and secondary crystallization induced by laser irradiation will be discussed. Additionally, surface modification and photophysical studies of colloidal cadmium selenide nanosheets will be presented. We have found that surface defects of cadmium selenide nanosheets mainly exist on the side surface of the material, and effective passivation of material defects and enhancement of material optoelectronic properties can be achieved through core-shell structures. The related research will contribute to the application of low-dimensional semiconductor materials in the field of optoelectronics.

Speaker Biography:

Rui Chen is a professor in the Department of Electronic and Electrical Engineering at the Southern University of Science and Technology. He graduated from the Department of Physics at Xiamen University in 2005 with a Bachelor of Science degree in Physics. He subsequently obtained a Ph.D. in Applied Physics from Nanyang Technological University in Singapore and a Ph.D. in Microelectronics and Solid-State Electronics from Xiamen University. He has published over 150 papers in internationally renowned journals such as Advanced Materials, Nano Letters, and Applied Physics Letters, including more than 20 cover articles. His papers have been cited over 7000 times, with an h-index of 50. His main research interests include laser spectroscopy, research on material optical properties, and optical microcavities and microlasers. He has led or participated in more than 10 research projects.

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