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Consolidation of the optoelectronic properties of CH(3)NH(3)PbBr(3) perovskite single crystals

Ultralow trap densities, exceptional optical and electronic properties have been reported for lead halide perovskites single crystals; however, ambiguities in basic properties, such as the band gap, and the electronic defect densities in the bulk and at the surface prevail. Here, we synthesize singl...

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Autores principales: Wenger, Bernard, Nayak, Pabitra K., Wen, Xiaoming, Kesava, Sameer V., Noel, Nakita K., Snaith, Henry J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5605602/
https://www.ncbi.nlm.nih.gov/pubmed/28928482
http://dx.doi.org/10.1038/s41467-017-00567-8
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author Wenger, Bernard
Nayak, Pabitra K.
Wen, Xiaoming
Kesava, Sameer V.
Noel, Nakita K.
Snaith, Henry J.
author_facet Wenger, Bernard
Nayak, Pabitra K.
Wen, Xiaoming
Kesava, Sameer V.
Noel, Nakita K.
Snaith, Henry J.
author_sort Wenger, Bernard
collection PubMed
description Ultralow trap densities, exceptional optical and electronic properties have been reported for lead halide perovskites single crystals; however, ambiguities in basic properties, such as the band gap, and the electronic defect densities in the bulk and at the surface prevail. Here, we synthesize single crystals of methylammonium lead bromide (CH(3)NH(3)PbBr(3)), characterise the optical absorption and photoluminescence and show that the optical properties of single crystals are almost identical to those of polycrystalline thin films. We observe significantly longer lifetimes and show that carrier diffusion plays a substantial role in the photoluminescence decay. Contrary to many reports, we determine that the trap density in CH(3)NH(3)PbBr(3) perovskite single crystals is 10(15) cm(−3) (,) only one order of magnitude lower than in the thin films. Our enhanced understanding of optical properties and recombination processes elucidates ambiguities in earlier reports, and highlights the discrepancies in the estimation of trap densities from electronic and optical methods.
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spelling pubmed-56056022017-09-22 Consolidation of the optoelectronic properties of CH(3)NH(3)PbBr(3) perovskite single crystals Wenger, Bernard Nayak, Pabitra K. Wen, Xiaoming Kesava, Sameer V. Noel, Nakita K. Snaith, Henry J. Nat Commun Article Ultralow trap densities, exceptional optical and electronic properties have been reported for lead halide perovskites single crystals; however, ambiguities in basic properties, such as the band gap, and the electronic defect densities in the bulk and at the surface prevail. Here, we synthesize single crystals of methylammonium lead bromide (CH(3)NH(3)PbBr(3)), characterise the optical absorption and photoluminescence and show that the optical properties of single crystals are almost identical to those of polycrystalline thin films. We observe significantly longer lifetimes and show that carrier diffusion plays a substantial role in the photoluminescence decay. Contrary to many reports, we determine that the trap density in CH(3)NH(3)PbBr(3) perovskite single crystals is 10(15) cm(−3) (,) only one order of magnitude lower than in the thin films. Our enhanced understanding of optical properties and recombination processes elucidates ambiguities in earlier reports, and highlights the discrepancies in the estimation of trap densities from electronic and optical methods. Nature Publishing Group UK 2017-09-19 /pmc/articles/PMC5605602/ /pubmed/28928482 http://dx.doi.org/10.1038/s41467-017-00567-8 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Wenger, Bernard
Nayak, Pabitra K.
Wen, Xiaoming
Kesava, Sameer V.
Noel, Nakita K.
Snaith, Henry J.
Consolidation of the optoelectronic properties of CH(3)NH(3)PbBr(3) perovskite single crystals
title Consolidation of the optoelectronic properties of CH(3)NH(3)PbBr(3) perovskite single crystals
title_full Consolidation of the optoelectronic properties of CH(3)NH(3)PbBr(3) perovskite single crystals
title_fullStr Consolidation of the optoelectronic properties of CH(3)NH(3)PbBr(3) perovskite single crystals
title_full_unstemmed Consolidation of the optoelectronic properties of CH(3)NH(3)PbBr(3) perovskite single crystals
title_short Consolidation of the optoelectronic properties of CH(3)NH(3)PbBr(3) perovskite single crystals
title_sort consolidation of the optoelectronic properties of ch(3)nh(3)pbbr(3) perovskite single crystals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5605602/
https://www.ncbi.nlm.nih.gov/pubmed/28928482
http://dx.doi.org/10.1038/s41467-017-00567-8
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