Dielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets

Owing to their flexible chemical synthesis and the ability to shape nanostructures, lead halide perovskites have emerged as high potential materials for optoelectronic devices. Here, we investigate the excitonic band edge states and their energies levels in colloidal inorganic lead halide nanoplatel...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Amal Ghribi, Rim Ben Aich, Kaïs Boujdaria, Thierry Barisien, Laurent Legrand, Maria Chamarro, Christophe Testelin
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	perovskites nanoplatelets electronic and dielectric confinements exciton energy exciton fine structure Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/c51ed291f6804be4a3327ac75e0ca386
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:c51ed291f6804be4a3327ac75e0ca386
record_format	dspace
spelling	oai:doaj.org-article:c51ed291f6804be4a3327ac75e0ca3862021-11-25T18:32:03ZDielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets10.3390/nano111130542079-4991https://doaj.org/article/c51ed291f6804be4a3327ac75e0ca3862021-11-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/3054https://doaj.org/toc/2079-4991Owing to their flexible chemical synthesis and the ability to shape nanostructures, lead halide perovskites have emerged as high potential materials for optoelectronic devices. Here, we investigate the excitonic band edge states and their energies levels in colloidal inorganic lead halide nanoplatelets, particularly the influence of dielectric effects, in a thin quasi-2D system. We use a model including band offset and dielectric confinements in the presence of Coulomb interaction. Short- and long-range contributions, modified by dielectric effects, are also derived, leading to a full modelization of the exciton fine structure, in cubic, tetragonal and orthorhombic phases. The fine splitting structure, including dark and bright excitonic states, is discussed and compared to recent experimental results, showing the importance of both confinement and dielectric contributions.Amal GhribiRim Ben AichKaïs BoujdariaThierry BarisienLaurent LegrandMaria ChamarroChristophe TestelinMDPI AGarticleperovskitesnanoplateletselectronic and dielectric confinementsexciton energyexciton fine structureChemistryQD1-999ENNanomaterials, Vol 11, Iss 3054, p 3054 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	perovskites nanoplatelets electronic and dielectric confinements exciton energy exciton fine structure Chemistry QD1-999
spellingShingle	perovskites nanoplatelets electronic and dielectric confinements exciton energy exciton fine structure Chemistry QD1-999 Amal Ghribi Rim Ben Aich Kaïs Boujdaria Thierry Barisien Laurent Legrand Maria Chamarro Christophe Testelin Dielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets
description	Owing to their flexible chemical synthesis and the ability to shape nanostructures, lead halide perovskites have emerged as high potential materials for optoelectronic devices. Here, we investigate the excitonic band edge states and their energies levels in colloidal inorganic lead halide nanoplatelets, particularly the influence of dielectric effects, in a thin quasi-2D system. We use a model including band offset and dielectric confinements in the presence of Coulomb interaction. Short- and long-range contributions, modified by dielectric effects, are also derived, leading to a full modelization of the exciton fine structure, in cubic, tetragonal and orthorhombic phases. The fine splitting structure, including dark and bright excitonic states, is discussed and compared to recent experimental results, showing the importance of both confinement and dielectric contributions.
format	article
author	Amal Ghribi Rim Ben Aich Kaïs Boujdaria Thierry Barisien Laurent Legrand Maria Chamarro Christophe Testelin
author_facet	Amal Ghribi Rim Ben Aich Kaïs Boujdaria Thierry Barisien Laurent Legrand Maria Chamarro Christophe Testelin
author_sort	Amal Ghribi
title	Dielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets
title_short	Dielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets
title_full	Dielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets
title_fullStr	Dielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets
title_full_unstemmed	Dielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets
title_sort	dielectric confinement and exciton fine structure in lead halide perovskite nanoplatelets
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c51ed291f6804be4a3327ac75e0ca386
work_keys_str_mv	AT amalghribi dielectricconfinementandexcitonfinestructureinleadhalideperovskitenanoplatelets AT rimbenaich dielectricconfinementandexcitonfinestructureinleadhalideperovskitenanoplatelets AT kaisboujdaria dielectricconfinementandexcitonfinestructureinleadhalideperovskitenanoplatelets AT thierrybarisien dielectricconfinementandexcitonfinestructureinleadhalideperovskitenanoplatelets AT laurentlegrand dielectricconfinementandexcitonfinestructureinleadhalideperovskitenanoplatelets AT mariachamarro dielectricconfinementandexcitonfinestructureinleadhalideperovskitenanoplatelets AT christophetestelin dielectricconfinementandexcitonfinestructureinleadhalideperovskitenanoplatelets
_version_	1718411042710618112

Dielectric Confinement and Exciton Fine Structure in Lead Halide Perovskite Nanoplatelets

Ejemplares similares