理学论坛第一百一十五次学术活动通知(吴志刚报告)
发布时间: 2017-09-26   浏览次数: 57

报告题目:Quantum mechanical simulations of dynamics of electronic excitations in nanoscale materials assemblies   (纳米材料体系里的电子激发和能量转换输运的量子力学计算)
报告人:吴志刚博士
报告人单位:美国科罗拉多矿业大学
时间:2017年9月27日13:30-
地点:教2-314会议室
主办单位:理学院、科研院

报告内容:Dynamics of electronically excited states including exciton generation and relaxation, exciton-exciton interaction, and charge/energy transfer and transport, are critical to understanding and optimizing nanoscale materials assemblies for optoelectronic applications, especially photovoltaic cells. Although considerable progress has been made, accurate experimental characterization of such crucial dynamics in nanostructures remains extremely challenging. In this talk, I will discuss the latest advance in quantum mechanical simulations of electronic excitations. I will present our recent works on electronic structures of various extended nanostructures including one-dimensional (1-D) silicon nanowires and 2-D periodically patterned graphene, and the charge transfer dynamics for a variety of organic-organic, organic-inorganic, and inorganic-inorganic interfaces between 0-D materials. I will also talk about the great challenges current first-principles electronic-structure calculations are facing, and our computational method development. Finally, I will propose a full-spectrum-light-absorption scheme for making highly efficient photovoltaic cells, taking advantage of complexity and flexibility of nanscale material assemblies consisting of different characteristics and dimensions.
报告人简介:北京大学核物理专业本科毕业、美国威廉与玛丽学院固体物理专业博士毕业,现为美国科罗拉多矿业大学物理系研究副教授。主要研究方向为纳米材料体系电子激发与能量输运,曾获得美国能源部杰出青年基金项目资助,研究成果丰硕,在国际能源顶级期刊EES发表论文1篇,在物理学顶级期刊PRL发表论文4篇,PRB发表论文10余篇,在材料及相关领域重要学术期刊发表论文多篇。