北京大学Huanping Zhou教授来访

2016-4-11 13:29:53

报告题目:Film formation and interface engineering for highly efficient perovskite solar cells

报告人:Prof. Huanping Zhou, Department of Materials Science and Engineering, Peking University

报告时间411日(星期一)上午1000

报告地点物理科技楼101

报告摘要:

Perovskite photovoltaic is emerging as one of the most competitive solar technology due to its excellent optoelectronic property, such as high absorption coefficient, long carrier diffusion length. The development of perovskite solar cell technologies toward higher power conversion efficiency (PCE) requires delicate control over the perovskite film and the relevant interfaces, and deep understanding of defects. The properties of the perovskite film can be optimized by careful control of the intercalation reaction between the organic and inorganic species during film formation. We developed two approaches for perovskite film formation: 1) vapor assisted solution process, and 2) one-step solution process under controlled humidity. We also carefully examined the underlying film growth mechanism, defect property and the corresponding device performance. Further controlling the carrier dynamics throughout the entire device, leads to suppressed carrier recombination in the absorber, efficient carrier injection into the carrier transport layers, and good carrier extraction at the electrodes. The fabrication of high performance perovskite solar cells (approaching 20%) was conducted from solution at low temperatures, which should simplify future manufacturing of high performance, low-cost, and large-area perovskite solar cells.

报告人简介

Dr. Huanping Zhou holds a BS in Material Chemistry from the China University of Geosciences in 2005, and she received her Ph.D. in Inorganic Chemistry from Peking University in 2010 (Advisor: Prof. Chunhua Yan). After that, she joined UCLA as a postdoctoral research from 2010 to 2015 (Advisor: Prof. Yang Yang). From 2015. 7, she joined PKU as an assistant Professorin Department of Materials Science and Engineering via Young Thousand Talent Program. She is a materials chemist with expertise in the fields of nanoscience, thin film optoelectronics, organic/inorganic interface engineering, and the development and fabrication of related devices, such as photovoltaic cells, TFTs, etc.

Her major contributions to the field of thin film photovoltaics are an improved understanding of thin film growth, defects passivation of polycrystalline film, and interface engineering, and its influence on device performance; the benign solvent processed CuIn(S,Se)2/Cu2ZnSn(S,Se)4 solar cell, solution processed window layer and top electrode, novel film growth and interface engineering for perovskite solar cell. She demonstrated nearly 20% power conversion efficiency for perovskite solar cell by interface engineering and improved crystal growth process. Also, she involved in achieving approximately 12% PCE and 9% PCE for CIGS and CZTS solar cell based on solution- phase precursor system. In addition to thin film optoelectronics, she also contributed to the area of functional nanomaterials, including controllable synthesis, self-assembly, and surface modification. She has published more than 48 papers in high quality peer-reviewed journals, e.g. Science, Nature Nanotech., Nature Commun., J. Am. Chem. Soc., Adv. Mater., Nano Lett., etc, with citations over 4000. She also received a variety of awards, e.g. Excellent Doctoral Dissertation (PKU), and 2014 Chancellor's Postdoctoral Scholar Award (UCLA).

Web: http://www.coe.pku.edu.cn/faculty-list/f/Zhou-Huanping

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