应物理科学与技术学院功能与环境材料研究所邀请，美国阿克隆大学高分子科学及工程学院龚雄副教授将于6月2日在我校作学术报告，敬请关注！
报告题目：Effects of Magnetic Nanoparticles and External Magnetostatic Field on the Bulk Heterojunction Polymer Solar Cells
报告时间：2015年6月2日10:00-12:00
报告地点：格致楼5004
摘要
The price of energy to separate tightly bound electron-hole pair (or charge-transfer state) and extract freely movable charges from low-mobility materials represents fundamental losses for many low-cost photovoltaic devices. In bulk heterojunction (BHJ) polymer solar cells (PSCs), approximately 50% of the total efficiency lost among all energy loss pathways is due to the photogenerated charge carrier recombination within PSCs and low charge carrier mobility of disordered organic materials. To address these issues, we introduce magnetic nanoparticles (MNPs) and orientate these MNPS within BHJ composite by an external magnetostatic field. Over 50% enhanced efficiency was observed from BHJ PSCs incorporated with MNPs and an external magnetostatic field alignment when compared to the control BHJ PSCs. The optimization of BHJ thin film morphology, suppression of charge carrier recombination, and enhancement in charge carrier collection result in a greatly increased short-circuit current density and fill factor, as a result, enhanced power conversion efficiency.
龚雄副教授简介
Currently, Dr. Gong is an Associate Professor in the Department of Polymer Engineering at the College of Polymer Science and Polymer Engineering, The University of Akron. He is also an Adjunct Chair Professor in the State Key Laboratory of Luminescence Materials and Devices at the South China University of Technology, P. R. China, and holds a Chief Scientist position at Heeger Beijing R&D Center. Prior to that, he was a senior research scientist in the Center for Polymers and Organic Solids at the University of California, Santa Barbara (UCSB), and a manager at the Cbrite Inc. from 2005 to 2010. He did his post-doctoral fellow with Professor Alan J Heeger (Noble Prize Winner) at University of California Santa Barbara. He obtained his Ph. D. in Physics from Nankai University, M. Sc. in Materials Science and Engineering from Lanzhou University and B. Sc. in Chemistry from Northwest Normal University. He received many international and national awards including the top 1% mostly cited scientists in the field of materials science between 2002 and 2012 reported by Thomson Reuters, USA NSF CAREER award (2014), 3M Faculty Award (2011) and NSF of China Oversea Outstanding Chinese Youngest Scientist Award (2008). He has accomplished over 140 articles published in the peer reviewed journals including in Science and Nature, with a peer citation over 15,000 times. He earned an H-index of 46. He also contributed 32 granted/pending patents and 8 book chapters.
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