화학공학소재연구정보센터
학회 한국공업화학회
학술대회 2019년 가을 (10/30 ~ 11/01, 제주국제컨벤션센터(ICC JEJU))
권호 23권 2호
발표분야 포스터_디스플레이
제목 Preferred-oriented grains with low-angle grain boundaries in halides perovskite films by pressure-induced re-crystallization
초록 Although its high photoconversion efficiency (PCE), low humidity stability blocks the way toward commercialization of halide perovskite-based photovoltaics. To overcome this critical hurdle, it is important to focus on grain boundary of halide perovskites. Accordingly, engineering grain boundary of halide perovskites can be a promising way to fabricate devices with high humidity stability. Herein, pressure-induced crystallization of halide perovskite film is demonstrated as a grain boundary healing technique for high moisture stability. After exposure to the condition of RH 85% 30 ℃, we observed enhanced moisture stability. Also, we revealed that pressure-induced crystallization enhances moisture stability not only by enlarging grain size of halide perovskites but also by reducing grain boundary angles. The devices with pressure-induced crystallization exhibited dramatically stabilized performance, sustaining over 0.7 normalized PCE after 200hr under RH 45%, 30℃.
저자 이정환, 전도형, 박종혁
소속 연세대
키워드 perovskite; grain boundary; pressure
E-Mail lutts@yonsei.ac.kr