Cargando…
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...
Autores principales: | , , , , , |
---|---|
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 |
_version_ | 1783265013461417984 |
---|---|
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. |
format | Online Article Text |
id | pubmed-5605602 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT wengerbernard consolidationoftheoptoelectronicpropertiesofch3nh3pbbr3perovskitesinglecrystals AT nayakpabitrak consolidationoftheoptoelectronicpropertiesofch3nh3pbbr3perovskitesinglecrystals AT wenxiaoming consolidationoftheoptoelectronicpropertiesofch3nh3pbbr3perovskitesinglecrystals AT kesavasameerv consolidationoftheoptoelectronicpropertiesofch3nh3pbbr3perovskitesinglecrystals AT noelnakitak consolidationoftheoptoelectronicpropertiesofch3nh3pbbr3perovskitesinglecrystals AT snaithhenryj consolidationoftheoptoelectronicpropertiesofch3nh3pbbr3perovskitesinglecrystals |