Altered Stability and Degradation Pathway of CH3NH3PbI3 in Contact with Metal Oxide
Degradation in CH3NH3PbI3 (MAPbI3), when in contact with commonly used metal oxide transport layer materials in optoelectronic devices, is explored experimentally and theoretically. On the basis of the decomposition temperature, the interfacial stability decreases in the following order: MAPbI3 + TiO2 ~ MAPbI3 alone > MAPbI3 + SnO2 > MAPbI3 + NiO, consistent with thermodynamic data. When MAPbI3 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. Furthermore, these results pinpoint the importance of understanding the interaction between halide perovskite and other materials used in a device to achieve intrinsically stable devices.
- Research Organization:
- Univ. of Texas at Dallas, Richardson, TX (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; National Science Foundation (NSF); National Research Foundation of Korea (NRF)
- Grant/Contract Number:
- EE0008544; CBET-1916612; NRF-2015M1A2A2055836; NRF-2018R1A2B6007888; NRF-2017M3A7B4041698
- OSTI ID:
- 1631153
- Journal Information:
- ACS Energy Letters, Vol. 5, Issue 4; ISSN 2380-8195
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Chemical instability leads to unusual chemical-potential-independent defect formation and diffusion in perovskite solar cell material CH 3 NH 3 PbI 3
Interfacial electronic structure at the CH{sub 3}NH{sub 3}PbI{sub 3}/MoO{sub x} interface