The enhancement of excitonic emission crossing Saha equilibrium in trap passivated CH3NH3PbBr3 perovskite. Mariano, F., Creti, A., Carbone, L., Genco, A., D'Agostino, S., Carallo, S., Montagna, G., Lomascolo, M., & Mazzeo, M. COMMUNICATIONS PHYSICS, FEB 27, 2020. doi abstract bibtex Metal-halide semiconductor perovskites have received great attention for the development of stable and efficient light emitting diodes and lasers, since they combine high charge carrier mobility and light emission spectral-purity with low-cost fabrication methods. Nevertheless, the role of excitons, free carries and trap states in perovskite light emission properties is still unclear due to their interdependence. In this paper we selectively manage trapping and light emission mechanisms by a reversible laser-assisted trap-passivation process performed on a CH3NH3PbBr3 perovskite layer, coupled to the inner modes of a high-quality micro-cavity, which only affects the radiative recombination. We show that photoluminescence is dominated by exciton radiative decay process and that trap states passivation increases the exciton gemination rate by reducing coulombic scattering of free electrons due to the ionized impurities. This picture provides a more general description than the model based on trap states-free Saha thermodynamic equilibrium between photo-generated species. The interdependence of free carries, trap states and excitons in the light emission properties of CH3NH3PbBr3 perovskite thin films and their relationship to device performance is a subject of debate. Here, the authors investigate the role of non-radiative recombination and demonstrate that the photoluminescence is dominated by exciton radiative decay processes.
@article{ ISI:000519376800001,
Author = {Mariano, Fabrizio and Creti, Arianna and Carbone, Luigi and Genco,
Armando and D'Agostino, Stefania and Carallo, Sonia and Montagna,
Giovanni and Lomascolo, Mauro and Mazzeo, Marco},
Title = {{The enhancement of excitonic emission crossing Saha equilibrium in trap
passivated CH3NH3PbBr3 perovskite}},
Journal = {{COMMUNICATIONS PHYSICS}},
Year = {{2020}},
Volume = {{3}},
Number = {{1}},
Month = {{FEB 27}},
Abstract = {{Metal-halide semiconductor perovskites have received great attention for
the development of stable and efficient light emitting diodes and
lasers, since they combine high charge carrier mobility and light
emission spectral-purity with low-cost fabrication methods.
Nevertheless, the role of excitons, free carries and trap states in
perovskite light emission properties is still unclear due to their
interdependence. In this paper we selectively manage trapping and light
emission mechanisms by a reversible laser-assisted trap-passivation
process performed on a CH3NH3PbBr3 perovskite layer, coupled to the
inner modes of a high-quality micro-cavity, which only affects the
radiative recombination. We show that photoluminescence is dominated by
exciton radiative decay process and that trap states passivation
increases the exciton gemination rate by reducing coulombic scattering
of free electrons due to the ionized impurities. This picture provides a
more general description than the model based on trap states-free Saha
thermodynamic equilibrium between photo-generated species.
The interdependence of free carries, trap states and excitons in the
light emission properties of CH3NH3PbBr3 perovskite thin films and their
relationship to device performance is a subject of debate. Here, the
authors investigate the role of non-radiative recombination and
demonstrate that the photoluminescence is dominated by exciton radiative
decay processes.}},
DOI = {{10.1038/s42005-020-0309-3}},
Article-Number = {{41}},
ISSN = {{2399-3650}},
ResearcherID-Numbers = {{Carbone, Luigi/O-2193-2015}},
ORCID-Numbers = {{Carbone, Luigi/0000-0002-1369-6890}},
Unique-ID = {{ISI:000519376800001}},
}
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Nevertheless, the role of excitons, free carries and trap states in perovskite light emission properties is still unclear due to their interdependence. In this paper we selectively manage trapping and light emission mechanisms by a reversible laser-assisted trap-passivation process performed on a CH3NH3PbBr3 perovskite layer, coupled to the inner modes of a high-quality micro-cavity, which only affects the radiative recombination. We show that photoluminescence is dominated by exciton radiative decay process and that trap states passivation increases the exciton gemination rate by reducing coulombic scattering of free electrons due to the ionized impurities. This picture provides a more general description than the model based on trap states-free Saha thermodynamic equilibrium between photo-generated species. The interdependence of free carries, trap states and excitons in the light emission properties of CH3NH3PbBr3 perovskite thin films and their relationship to device performance is a subject of debate. Here, the authors investigate the role of non-radiative recombination and demonstrate that the photoluminescence is dominated by exciton radiative decay processes.","doi":"10.1038/s42005-020-0309-3","article-number":"41","issn":"2399-3650","researcherid-numbers":"Carbone, Luigi/O-2193-2015","orcid-numbers":"Carbone, Luigi/0000-0002-1369-6890","unique-id":"ISI:000519376800001","bibtex":"@article{ ISI:000519376800001,\nAuthor = {Mariano, Fabrizio and Creti, Arianna and Carbone, Luigi and Genco,\n Armando and D'Agostino, Stefania and Carallo, Sonia and Montagna,\n Giovanni and Lomascolo, Mauro and Mazzeo, Marco},\nTitle = {{The enhancement of excitonic emission crossing Saha equilibrium in trap\n passivated CH3NH3PbBr3 perovskite}},\nJournal = {{COMMUNICATIONS PHYSICS}},\nYear = {{2020}},\nVolume = {{3}},\nNumber = {{1}},\nMonth = {{FEB 27}},\nAbstract = {{Metal-halide semiconductor perovskites have received great attention for\n the development of stable and efficient light emitting diodes and\n lasers, since they combine high charge carrier mobility and light\n emission spectral-purity with low-cost fabrication methods.\n Nevertheless, the role of excitons, free carries and trap states in\n perovskite light emission properties is still unclear due to their\n interdependence. In this paper we selectively manage trapping and light\n emission mechanisms by a reversible laser-assisted trap-passivation\n process performed on a CH3NH3PbBr3 perovskite layer, coupled to the\n inner modes of a high-quality micro-cavity, which only affects the\n radiative recombination. We show that photoluminescence is dominated by\n exciton radiative decay process and that trap states passivation\n increases the exciton gemination rate by reducing coulombic scattering\n of free electrons due to the ionized impurities. This picture provides a\n more general description than the model based on trap states-free Saha\n thermodynamic equilibrium between photo-generated species.\n The interdependence of free carries, trap states and excitons in the\n light emission properties of CH3NH3PbBr3 perovskite thin films and their\n relationship to device performance is a subject of debate. Here, the\n authors investigate the role of non-radiative recombination and\n demonstrate that the photoluminescence is dominated by exciton radiative\n decay processes.}},\nDOI = {{10.1038/s42005-020-0309-3}},\nArticle-Number = {{41}},\nISSN = {{2399-3650}},\nResearcherID-Numbers = {{Carbone, Luigi/O-2193-2015}},\nORCID-Numbers = {{Carbone, Luigi/0000-0002-1369-6890}},\nUnique-ID = {{ISI:000519376800001}},\n}\n\n","author_short":["Mariano, F.","Creti, A.","Carbone, L.","Genco, A.","D'Agostino, S.","Carallo, S.","Montagna, G.","Lomascolo, M.","Mazzeo, M."],"key":"ISI:000519376800001","id":"ISI:000519376800001","bibbaseid":"mariano-creti-carbone-genco-dagostino-carallo-montagna-lomascolo-etal-theenhancementofexcitonicemissioncrossingsahaequilibriumintrappassivatedch3nh3pbbr3perovskite-2020","role":"author","urls":{},"downloads":0},"bibtype":"article","biburl":"http://nanotec.cnr.it/data/nanotec/nanotec-with-abstract.bib","creationDate":"2020-04-21T16:04:29.794Z","downloads":0,"keywords":[],"search_terms":["enhancement","excitonic","emission","crossing","saha","equilibrium","trap","passivated","ch3nh3pbbr3","perovskite","mariano","creti","carbone","genco","d'agostino","carallo","montagna","lomascolo","mazzeo"],"title":"The enhancement of excitonic emission crossing Saha equilibrium in trap passivated CH3NH3PbBr3 perovskite","year":2020,"dataSources":["qabHv7MDBiEn82jCu"]}