How to convert perovskite grain boundaries to be thermally stable?
일 시 : 2020년 11월 26일 목요일 16:00
연 사 : 남 궁 곤 교수 (Old Dominion U., Dept of ECE)
장 소 : 자연과학관 208호
초 록
The clean energy revolution is taking place around the world in which we are seeking for reliable, affordable and robust energy sources. Although many researchers recently revolutionized organic-inorganic perovskite solar cells, the long-term stability of perovskite solar cells remains a problem. Typically, the solution-process of perovskite thin films inevitably produce structural imperfections and significant spatial variations of chemical and energetic disorders, particularly at grain boundaries (GBs). Although thermal degradation at GBs in perovskite materials has been extensively studied, how to prevent thermal degradation processes at GB has not yet been fully explored. Herein, in this talk, polymer will be utilized as one way to slow down or prevent thermal degradation of perovskite GBs and its underlying mechanisms will be explained.