콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Altered Stability and Degradation Pathway of CH3NH3PbI3 in Contact with Metal Oxide
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2020-04
- 저자명 홍기하,Thampy, S (Thampy, Sampreetha),Zhang, B (Zhang, Boya),Cho, K (Cho, Kyeongjae),Hsu, JWP (Hsu, Julia W. P.)
- 학술지명 ACS ENERGY LETTERS
- 발행처명 AMER CHEMICAL SOC
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 5
논문 초록 (Abstract)
Degradation in CH3NH3PbI3 (MAPbI(3)), when in contact with commonly used metal oxide transport layer materials in optoelectronic devices, is examined experimentally and theoretically. On the basis of the decomposition temperature, the interfacial stability decreases in the following order: MAPbI(3) + TiO2 similar to MAPbI(3) alone > MAPbI(3) + SnO2 > MAPbI(3) + NiO, consistent with thermodynamic data. When MAPbI(3) contacts NiO or SnO2, experimental results unequivocally show interfacial decomposition occurs at a lower temperature than bulk decomposition and produces different degradation products. Density functional theory calculations reveal an altered reaction pathway on oxide surfaces and elucidate the difference between NiO and TiO2. These findings pinpoint the importance of understanding the interaction between halide perovskite and other materials used in a device to achieve intrinsically stable devices.
