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

Giulia J Longo 1 Alan Wong 2 Michele J Sessolo 1 Henk J Bolink 1 
2 LSDRM - Laboratoire Structure et Dynamique par Résonance Magnétique (LCF)
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
Abstract : Methylammonium lead bromide (MAPbBr 3) 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 MAPbBr 3 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.
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https://hal-cea.archives-ouvertes.fr/cea-01496886
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Submitted on : Tuesday, March 28, 2017 - 8:41:49 AM
Last modification on : Friday, January 7, 2022 - 3:54:29 AM

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Giulia J Longo, Alan Wong, Michele J Sessolo, Henk J Bolink. Effect of the precursor's stoichiometry on the optoelectronic properties of methylammonium lead bromide perovskites. Journal of Luminescence, Elsevier, 2017, 189, pp.120-125. ⟨10.1016/j.jlumin.2017.03.048⟩. ⟨cea-01496886⟩

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