学术报告—— 杨晔 博士（美国可再生能源国家实验室）
讲座题目：Photo-induced Charge Carrier Dynamics in Semiconductors for Solar Energy Conversion
报 告 人：杨晔 博士
美国可再生能源国家实验室
时 间：2016年4月15日（周五）上午10:00
地 点：卢嘉锡楼202报告厅
报告摘要：Photovoltaic devices based on semiconductors operate by capturing photons from sunlight and converting the solar energy into electricity or chemical fuels. Photons with energy above the semiconductor bandgap create charge carriers—negative electrons and positive holes. The electron and hole are separately collected at the two electrodes to produce electric current or chemical fuels. This talk focuses on the dynamics of these charge carriers in the bulk of semiconductors or at heterojunctions to further understand solar energy conversion processes and investigate next generation conversion processes for higher efficiency devices. In the first part, I will focus on understanding carrier dynamics at the junction between a semiconductor electrode and an amorphous TiO2 layer, and the result uncovers the beneficial roles of amorphous TiO2 in the energy-conversion process. In the second part, I will discuss the carrier dynamics in emerging semiconductor materials for the next generation solar cells.
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