Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP27)
Publication date: 22nd October 2026
Tin-lead mixed perovskites are key materials for tandem photovoltaics due to their ideal narrow bandgaps, and the vast majority of studies on Sn-Pb perovskites have focused on FA-based compositions. However, the film morphology of solution-processed Sn-Pb perovskites is often compromised by imbalanced crystallization kinetics. The tendency of Sn components to crystallize faster than Pb leads to uncontrollable growth and insufficient film coverage. In this work, we utilize methylamine gas treatment (MATM) to control film growth. Through its reversible liquefaction and inherent surface smoothing, MATM offers a robust strategy to heal perovskite thin films. To gain deeper insight into the distinct and cooperative behaviors of Pb and Sn during the MATM process, in situ UV-Vis spectroscopy is employed as a crucial real-time diagnostic tool. By tracking the evolution of optical absorption features, in situ UV-Vis measurements capture the transformation of the perovskite film from the solid state to a liquefied intermediate and back to the recrystallized phase. This study establishes in situ UV-Vis as a convenient analytical approach and demonstrates that MATM is a precise strategy for optimizing perovskite film morphology.
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International Conference on Hybrid and Organic Photovoltaics
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Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
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