报告题目：钙钛矿材料的实时超快载流子动力学

报告人：高剑波，加拿大布鲁克大学化学系和工程系副教授

报告时间：11月4日（周六）9:00

报告地点：腾讯会议：549 295 868 密码：09168

主办单位：原子与分子物理研究所

报告摘要：

The understanding of ultrafast carrier dynamics is the foundation of emergent perovskite materials, which demonstrate promising optoelectronic application in solar cells, LEDs, photodetectors, and X-ray detection due to their superior electrical and optical properties. To unravel the carrier dynamics, the majority research groups must rely on classic ultrafast optical spectroscopies such as pump-probe transient absorption (TA) spectroscopy and time-resolved photoluminescence (TRPL). Although these non-contact photon-in and photon-out approaches have made revolutionary discoveries, which have been demonstrated by our pioneers’ work in femtochemistry (Zewail, 1999), super resolution microscopy (Hell, 2014), and chirped pulsed amplification (Strickland, 2018), they lack an in-situ feature for characterizing building block devices such as solar cells, LEDs, photoconductors, transistors, etc..

In this talk, I will highlight the ultrafast photocurrent spectroscopy (UPCS) that we have developed to bridge the gap between classic optical spectroscopies and carrier dynamics in-situ devices. In particular, I will focus on nanostructured perovskites materials. To contribute to the perovskite community, we have addressed the following unique questions including 1) the unknown landscape of defect states; 2) the unique carrier drift transport dynamics; 3) and the novel perovskite solar cell characterization. Our fundamental understanding of carrier transport dynamics will lead to the next generation photovoltaics and other novel devices applications.

报告人简介：

高剑波博士，加拿大布鲁克大学化学系和工程系副教授，博士生导师。2009年取得加拿大阿尔巴塔大学物理系博士学位，之后师从于美国加利福尼亚伯克利分校纳米领域先驱 Paul Alivisatos教授、美国洛斯阿拉莫斯国家实验室超快光谱权威Victor Klimov博士、美国国家再生能源国家实验室太阳能电池泰斗Art Nozik 和Matt Beard教授从事博士后工作。从2017年到2022年，高剑波博士在美国克莱姆森大学任物理系助理教授。主要研究方向为超快激光光谱的开发与应用、纳米材料合成、光电器件的开发（包括新兴量子点、钙钛矿太阳能电池，LEDs, 光感应器等），致力于建立载流子动力学和器件物理机制的直接联系。先后主持和参与美国国家科学基金委、能源部和州政府项目。目前，已发表SCI论文60余篇，主要包括Science，Nature Physics, Nature Communications, Advanced Materials，ACS Nano，Nano Letters等。发表论文总引用近5700次。

基于目前新材料、光电、光谱领域一直缺少先进的光谱表征仪器。特别是以直接收集超快电流的方式去研究载流子的输运。近年，高剑波博士发展了一系列独特的超快光电流光谱技术，尝试突破时间分辨的极限，推动工业和基础科学进程，以贡献于学术和光伏工业界。