Formation of CH3NH2-incorporated intermediate state in CH3NH3PbI3hybrid perovskite thin film formed by sequential vacuum evaporation

Autor: Jung, Min-Cherl, Kobori, Sora, Matsuyama, Asuka, Maeng, Inhee, Lee, Young Mi, Kojima, Hirotaka, Benten, Hiroaki, Nakamura, Masakazu
Zdroj: Applied Physics Express (APEX); January 2019, Vol. 12 Issue: 1 p015501-015501, 1p
Abstrakt: CH3NH3PbI3thin films were formed with various deposition rates of PbI2first layer using a sequential vacuum evaporation method (SVE) to understand the formation behavior. Under low PbI2deposition rates with 1 and 3  Å s?1, the thin films did not form the hybrid perovskite structure. Over the 6  Å s?1deposition rate, the perovskite structure is observed with the remaining PbI2and an intermediate phase together. In the 10  Å s?1, the intermediate phase is increased, and the CH3NH2molecular defect is observed. The hybrid perovskite thin film formed by SVE is confirmed with tiny grains and CH3NH2-incorporated intermediate state.
Databáze: Supplemental Index