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

Maria Grazia La-Placa, Dengyang Guo, Lidón Gil-Escrig, Francisco Palazon, Michele Sessolo, Henk J. Bolink

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1902-1908
JournalJournal of Materials Chemistry C
Volume8
Issue number6
DOIs
Publication statusPublished - 2020

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