時間：2024-12-06(五) 15:10 pm

講題：Stability evolution of photovoltaic materials: From perovskites to coordination nanosheets

講者：王映樵 教授

服務單位：國立中山大學 材料與光電科學學系

地點：93456

主持人：孫亞賢 教授

摘要 :

Further improving the power conversion efficiency (PCE) of perovskite solar cells (PSCs) is crucial for practical applications. Through interface engineering, I have enhanced PSC performance using polar fullerene derivatives. However, the limited stability of organic-inorganic perovskite crystals poses a significant barrier to commercial development. To address this issue, I propose replacing perovskite crystals with coordination nanosheets (CONASHs), which also consist of organic molecules and inorganic metal ions. Unlike the weaker van der Waals forces that bond the organic and inorganic components in perovskite crystals, CONASHs are held together by strong covalent bonds. This structural advantage is expected to provide CONASHs with superior stability compared to perovskites. Recently, I developed an iron-based CONASH and demonstrated its exceptional self-powered photoreactivity. More importantly, its air stability is remarkable: after two months of exposure to air, the photocurrent retains 94% of its original value. This is the highest reported stability for organic-inorganic hybrid materials to date.

學經歷 :

Ying-Chiao Wang is currently an Assistant Professor in the Department of Materials and Optoelectronic Science at National Sun Yat-sen University, Taiwan, R.O.C. He earned his Ph.D. in Materials Science from National Taiwan University in 2015. Following this, he joined the Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, as a Distinguished Young Researcher from 2016 to 2018. In 2018, Dr. Wang worked as a postdoctoral researcher in the Department of Electrical Engineering and Computer Science at the School of Engineering, Nagoya University. Later that year, he was appointed as an ICYS Research Fellow at the International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS). From 2021 to 2022, he continued his postdoctoral research at the International Center for Materials Nanoarchitectonics (MANA), NIMS. In May 2022, he transitioned to industry, working as a materials engineer at iLab, Foxconn Technology Group. Dr. Wang's research focuses on the development of solution‐processed nanomaterials and their applications in photovoltaics.