報告題目：高壓調(diào)控雜化鈣鈦礦的電子和光學(xué)特性研究（Engineering Electro and Optical Properties of hybrid Perovskites with High Pressure）
報告人：申澤驤 南洋理工大學(xué)
報告時間：6月17日（周五）10：00
報告地點：線上騰訊會議（騰訊會議號：969-404-693）
摘要：
Hybrid perovskites are a new class of functional materials with potential applications in various technologically important areas, such as solar cells, LED and lasing. Compared with their 3D counterparts, 2D perovskites exhibit special properties, e.g. their natural quantum-well structure yields stable excitons, able to interact more strongly with phonons, spins and defects. Layered perovskites are also more structurally stable. High pressure induces a rich variety of phenomena in the electronic and optical properties in the hybrid Perovskite materials, including enhancement of photoluminescence (PL) by at least two orders of magnitude, narrow to white light emission, rich PL energy and lifetime changes. The optical properties of 2D perovskites are mainly governed by excitons, and the investigation of intrinsic and extrinsic, radiative and nonradiative exciton recombination pathways is essential. The intrinsic pathways are related to exciton-phonon interactions. Lattice vibrations create spatial and temporal potential fluctuations, where the first one causes scattering of excitons and broadening of excitonic peaks in optical spectroscopy, while the second leads to the fine structure of the spectra, known as Frank-Condon shape. Besides, a moving exciton is able to create vibrations around it, inducing lattice distortions.
個人簡歷：
申澤驤，新加坡南洋理工大學(xué)（NTU）數(shù)理學(xué)院教授，材料科學(xué)與工程學(xué)院教授，先進(jìn)光子學(xué)技術(shù)中心主任，全球高被引科學(xué)家，榮獲莫斯科國立大學(xué)榮譽教授，新加坡新移民杰出貢獻(xiàn)獎，新加坡物理學(xué)會卓越研究金獎；新加坡南洋理工大學(xué)研究及創(chuàng)新獎，倫敦大學(xué)國王學(xué)院卓越博士論文獎，王寬成獎學(xué)金，英國卓越海外留學(xué)生獎學(xué)金。申澤驤教授現(xiàn)任研究生院副院長，負(fù)責(zé)NTU跨學(xué)科研究生院，曾擔(dān)任南洋理工大學(xué)董事會顧問、新加坡物理學(xué)會理事、新加坡材料學(xué)會理事、國際物理奧委會成員、新加坡奧林匹克物理競賽主席，及新加坡-中國科學(xué)技術(shù)交流促進(jìn)協(xié)會會長。
