Photoemission Properties of Perovskite Thin Films, Microcrystals and Nanocrystals
Hernán Míguez a, David O. Tiede a, Andrea Rubino a, Mauricio E. Calvo a, Juan F. Galisteo-López a
a Instituto de Ciencia de Materiales de Sevilla (ICMS), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, C/ Américo Vespucio 49, Sevilla, Spain
nanoGe Perovskite Conferences
Proceedings of nanoGe International Conference on Perovskite Solar Cells, Photonics and Optoelectronics (NIPHO19)
International Conference on Perovskite Photonics and Optoelectronics
Jerusalem, Israel, 2019 February 24th - 27th
Organizers: Lioz Etgar and Paul Meredith
Invited Speaker, Hernán Míguez, presentation 021
DOI: https://doi.org/10.29363/nanoge.nipho.2019.021
Publication date: 21st November 2018

A description of the photoemission properties of perovskite thin films, microcrystals and nanocrystals, and their dependence with the chemical and optical environment, will be provided. The exposure of thin films and microcrystals to different atmospheres has a strong effect on their photoemission, which reveals relevant information about the mechanism behind ion migration, one of the most intriguing observations reported for these semiconductors.[1,2] A detailed analysis of the processes triggered by photoexcitation that lead to activation and latter deactivation of luminescence will be presented. Also, it will be shown that precise control of the spectral features of the luminescence, along with enhanced stability, can be achieved from perovskite nanocrystals synthesized in different types of nanoporous matrices.[3,4] Interestingly, under these conditions, increase of the photoluminescence quantum yield results from the improved optical environment they are exposed to.[5] All this opens the door to the development of novel color converting coatings of application in LED technology, as it will be demonstrated in this talk.

Financial support of the Spanish Ministry of Economy and Competitiveness under grant MAT2017-88584-R is gratefully acknowledged.

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