6533b7d2fe1ef96bd125eab0

RESEARCH PRODUCT

Dual-source vacuum deposition of pure and mixed halide 2D perovskites: thin film characterization and processing guidelines

Lidón Gil-escrigMichele SessoloMaria-grazia La-placaDengyang GuoFrancisco PalazonHenk J. Bolink

subject

Materials scienceBand gapAnalytical chemistryHalide02 engineering and technologyGeneral Chemistry010402 general chemistry021001 nanoscience & nanotechnology01 natural sciences0104 chemical sciencesCharacterization (materials science)CrystallinityVacuum depositionSemiconductorsMaterials ChemistryDeposition (phase transition)Thin film0210 nano-technologyMaterialsPerovskite (structure)

description

The dual-source vacuum deposition of 2D perovskite films of the type PEA2PbX4, (PEA = phenethylammonium and X = I−, Br−, or a combination of both) is presented. Low-temperature deposited 2D perovskite films showed high crystallinity with the expected trend of bandgap as a function of halide type and concentration. Importantly, we observed an unavoidable halide cross-contamination among different deposition runs, as well as a strong dependence of the material quality on the type of halide precursors used. These findings should be taken into account in the development of vacuum processing for low-dimensional mixed halide perovskites.

10.1039/c9tc06662dhttps://hdl.handle.net/10550/75093