Presentation Information
[9a-E201-1]Tunable crystallinity and elemental homogeneity in tin-lead perovskite films via surface passivation
〇(PC)Shahrir Razey Sahamir1, Qing Shen1, Hiroshi Segawa2, Shuzi Hayase1 (1.Univ. of Electro-Com, 2.Univ. of Tokyo)
Keywords:
tin-lead SnPb perovskite,crystallinity,surface passivation
SnPb films suffer rapid degradation due to the oxidation of the Sn component rendered them unsuitable for long term deployment. The quality of the SnPb films also affected by the crystallization speed of the perovskite upon coating. Due to fast and non-synchronise crystallization of the SnPb films, various defects occurred. These defects are detrimental to the performance of the SnPb based PSCs for power generation application. In this study, the crystallinity and elemental homogeneity of the SnPb will be studied in order to demonstrate their correlation with the performance and the stability of the SnPb PSCs. The preliminary XPS elemental analysis showed that the Pb component on the surface of the SnPb films can be manipulated via surface passivation. Higher Pb coverage on the surface can be realized by surface passivation. Capping the SnPb surface with higher Pb coverage could hinder the vacancy defects and reduce the Sn oxidation, thus improving the crystallinity and the quality of the SnPb perovskite films. This in turn enhanced the PCE of the SnPb PSCs.