Effect of the precursor's stoichiometry on the optoelectronic properties of methylammonium lead bromide perovskites

Giulia Longo, Alan Wong, Michele Sessolo*, Henk J. Bolink

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Methylammonium lead bromide (MAPbBr3) perovskites have been widely studied in applications such as lasers and light-emitting diodes, thanks to their favorable bandgap, efficient charge transport, and the possibility of processing by simple solution methods. The film morphology has a large impact on the optical and electronic properties of the material; hence the deposition methods and the type of precursors used are crucial in the preparation of efficient optoelectronic devices. Here we studied the effect of the precursor´s stoichiometry of solution processed MAPbBr3 thin films on their optical and electronic properties. We found a drastic effect of the stoichiometry on the resulting thin film morphology, and suggest the use of excess MA cations to enhance the photo- and electroluminescence of hybrid perovskites.

Original languageEnglish
Pages (from-to)120-125
Number of pages6
JournalJournal of Luminescence
Volume189
Early online date23 Mar 2017
DOIs
Publication statusPublished - 1 Sep 2017
Externally publishedYes

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