Investigation of Thermally Induced Degradation in CH₃NH₃PbI₃ Perovskite Solar Cells using In-situ Synchrotron Radiation Analysis.

ABSTRACT: In this study, we employ a combination of various in-situ surface analysis techniques to investigate the thermally induced degradation processes in MAPbI₃ perovskite solar cells (PeSCs) as a function of temperature under air-free conditions (no moisture and oxygen). Through a comprehensive approach that combines in-situ grazing-incidence wide-angle X-ray diffraction (GIWAXD) and high-resolution X-ray photoelectron spectroscopy (HR-XPS) measurements, we confirm that the surface structure of MAPbI₃ perovskite film changes to an intermediate phase and decomposes to CH₃I, NH₃, and PbI₂ after both a short (20 min) exposure to heat stress at 100 °C and a long exposure (>1 hour) at 80 °C. Moreover, we observe clearly the changes in the orient

SUBMITTER: Kim NK 

PROVIDER: S-EPMC5498566 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature