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学术讲座:Like a rolling stone: Ultrafast spectroscopy of carrier dynamics in diverse materials

2020-09-15 15:08  点击:[]

讲座题目:Like a rolling stone: Ultrafast spectroscopy of carrier dynamics in diverse materials

主 讲 人:电子科技大学曾鹏 副研究员

讲座时间:9月17日(周四)下午16:00

讲座地点:能动学院301

讲座内容:

This talk presents studies of ultrafast laser spectroscopy of semiconductors and nanostructures, aiming to advance our understanding of, and consequently control, photoinduced charge carrier dynamics to further improve the performance in practical applications.

Artificial nanostructures have drawn significant attention in applications such as optoelectronic devices, photo-catalysts, and solar cells. Compared to bulk materials, nanostructures provide unique optical properties, which more importantly can be directly and easily tailored through changing size or shapes of the structures, during their synthesis procedures. Photoinduced charge carrier dynamics in the nanostructures play an important role in the photon conversion processes. However, in contrast to the fast development of nanostructure-based devices, the mechanisms of these processes are still being experimentally unravelled. In this talk, a range of ultrafast optical spectroscopy methods have been applied to investigate the carrier dynamics in diverse materials including semiconductor quantum dots, perovskite films and nanocrystals, with a focus on the electron transfer process.

This talk will show the great ability of ultrafast optical spectroscopy to reveal photoinduced processes. Results indicate ways for rational design of nanostructure-based devices. A greater understanding in underlying physics leads to better control of the performance of these nanosystems in potential practical applications.

主讲人概况:

曾鹏,籍贯:重庆

教育及工作经历:

2018-至今 电子科技大学,材料与能源学院,成都

2017 德国康斯坦茨大学,化学系,访问学者,合编辑:Dr. K. Boldt,德国康斯坦茨

2014-2017 澳大利亚墨尔本大学,化学系,博士,导师:Prof. T. A. Smith,澳大利亚墨尔本

2011-2013 日本东北大学,物理化学专攻,硕士,导师:福村裕史 教授,日本仙台

2005-2009 清华大学,工程物理系,学士,北京

2002-2005 重庆南开中学,高中,重庆沙坪坝

从事超快光谱在新型材料基础机制探索中的应用。研究方向包括半导体纳米材料中的载流子动态、金属纳米结构中的热电子传导、光与物质耦合等过程。同时研究并自主搭建和发展超快光谱、超精细分辨显微设备与技术。研究兴趣覆盖但不限于:

1.利用超快光谱、超精细显微技术研究热载流子、激子-声子耦合现象;

2.载流子扩散、复合的光谱测量、数值模拟与仿真;

3.钙钛矿纳米结构等新型材料的研究;

    4.超快光谱、超精细显微系统的搭建等。

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