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Title

Improving the Bulk Emission Properties of CH3 NH3 PbBr3 by Modifying the Halide-Related Defect Structure

AuthorsTiede, David O.; Calvo, Mauricio E. CSIC ORCID ; Galisteo-López, Juan F.; Míguez, Hernán CSIC ORCID
Issue Date2018
PublisherAmerican Chemical Society
CitationJournal of Physical Chemistry C 122: 27250- 27255 (2018)
AbstractThe peculiar defect chemistry of hybrid organic ¿ inorganic lead halide perovskites is believed to be partially responsible for the outstanding performance of this solution- processed material in optoelectronic devices. While most e ff ort has been put on the management of halide defects (the ones presenting the highest mobility) for CH 3 NH 3 PbI 3 , its bromide counterpart has not been so widely studied. Although the former is the material of choice for photovoltaics, the latter is present in most light-emitting applications. Here, we report how the exposure of CH 3 NH 3 PbBr 3 single crystals to a bromine atmosphere strongly a ff ects its emission properties. Such improvement takes place in the absence of apparent signs of degradation and remains for tens of hours. We propose an explanation based on the defect structure for this material where bromine-related defects can act as deep or shallow traps. These results are of relevance for a material expected to be present in a new generation of solution-processed light- emitting devices
URIhttp://hdl.handle.net/10261/175933
DOI10.1021/acs.jpcc.8b09315
Identifiersdoi: 10.1021/acs.jpcc.8b09315
issn: 1932-7447
Appears in Collections:(ICMS) Artículos




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