Light Emission Properties of Thermally Evaporated CH<sub<3</sub<NH<sub<3</sub<PbBr<sub<3</sub< Perovskite from Nano- to Macro-Scale: Role of Free and Localized Excitons

Over the past decade, interest about metal halide perovskites has rapidly increased, as they can find wide application in optoelectronic devices. Nevertheless, although thermal evaporation is crucial for the development and engineering of such devices based on multilayer structures, the optical prop...
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Autor*in:	Claudia Triolo [verfasserIn] Maria Luisa De Giorgi [verfasserIn] Antonella Lorusso [verfasserIn] Arianna Cretì [verfasserIn] Saveria Santangelo [verfasserIn] Mauro Lomascolo [verfasserIn] Marco Anni [verfasserIn] Marco Mazzeo [verfasserIn] Salvatore Patané [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2022

Schlagwörter:	perovskite thermal evaporation trap states free excitons localized excitons PL emission

Übergeordnetes Werk:	In: Nanomaterials - MDPI AG, 2012, 12(2022), 2, p 211
Übergeordnetes Werk:	volume:12 ; year:2022 ; number:2, p 211

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/nano12020211

Katalog-ID:	DOAJ086021826

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callnumber-first	Q - Science
author	Claudia Triolo
spellingShingle	Claudia Triolo misc QD1-999 misc perovskite misc thermal evaporation misc trap states misc free excitons misc localized excitons misc PL emission misc Chemistry Light Emission Properties of Thermally Evaporated CH<sub<3</sub<NH<sub<3</sub<PbBr<sub<3</sub< Perovskite from Nano- to Macro-Scale: Role of Free and Localized Excitons
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topic_title	QD1-999 Light Emission Properties of Thermally Evaporated CH<sub<3</sub<NH<sub<3</sub<PbBr<sub<3</sub< Perovskite from Nano- to Macro-Scale: Role of Free and Localized Excitons perovskite thermal evaporation trap states free excitons localized excitons PL emission
topic	misc QD1-999 misc perovskite misc thermal evaporation misc trap states misc free excitons misc localized excitons misc PL emission misc Chemistry
topic_unstemmed	misc QD1-999 misc perovskite misc thermal evaporation misc trap states misc free excitons misc localized excitons misc PL emission misc Chemistry
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title	Light Emission Properties of Thermally Evaporated CH<sub<3</sub<NH<sub<3</sub<PbBr<sub<3</sub< Perovskite from Nano- to Macro-Scale: Role of Free and Localized Excitons
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title_full	Light Emission Properties of Thermally Evaporated CH<sub<3</sub<NH<sub<3</sub<PbBr<sub<3</sub< Perovskite from Nano- to Macro-Scale: Role of Free and Localized Excitons
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title_sort	light emission properties of thermally evaporated ch<sub<3</sub<nh<sub<3</sub<pbbr<sub<3</sub< perovskite from nano- to macro-scale: role of free and localized excitons
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title_auth	Light Emission Properties of Thermally Evaporated CH<sub<3</sub<NH<sub<3</sub<PbBr<sub<3</sub< Perovskite from Nano- to Macro-Scale: Role of Free and Localized Excitons
abstract	Over the past decade, interest about metal halide perovskites has rapidly increased, as they can find wide application in optoelectronic devices. Nevertheless, although thermal evaporation is crucial for the development and engineering of such devices based on multilayer structures, the optical properties of thermally deposited perovskite layers (spontaneous and amplified spontaneous emission) have been poorly investigated. This paper is a study from a nano- to micro- and macro-scale about the role of light-emitting species (namely free carriers and excitons) and trap states in the spontaneous emission of thermally evaporated thin layers of CH<sub<3</sub<NH<sub<3</sub<PbBr<sub<3</sub< perovskite after wet air UV light trap passivation. The map of light emission from grains, carried out by SNOM at the nanoscale and by micro-PL techniques, clearly indicates that free and localized excitons (EXs) are the dominant light-emitting species, the localized excitons being the dominant ones in the presence of crystallites. These species also have a key role in the amplified spontaneous emission (ASE) process: for higher excitation densities, the relative contribution of localized EXs basically remains constant, while a clear competition between ASE and free EXs spontaneous emission is present, which suggests that ASE is due to stimulated emission from the free EXs.
abstractGer	Over the past decade, interest about metal halide perovskites has rapidly increased, as they can find wide application in optoelectronic devices. Nevertheless, although thermal evaporation is crucial for the development and engineering of such devices based on multilayer structures, the optical properties of thermally deposited perovskite layers (spontaneous and amplified spontaneous emission) have been poorly investigated. This paper is a study from a nano- to micro- and macro-scale about the role of light-emitting species (namely free carriers and excitons) and trap states in the spontaneous emission of thermally evaporated thin layers of CH<sub<3</sub<NH<sub<3</sub<PbBr<sub<3</sub< perovskite after wet air UV light trap passivation. The map of light emission from grains, carried out by SNOM at the nanoscale and by micro-PL techniques, clearly indicates that free and localized excitons (EXs) are the dominant light-emitting species, the localized excitons being the dominant ones in the presence of crystallites. These species also have a key role in the amplified spontaneous emission (ASE) process: for higher excitation densities, the relative contribution of localized EXs basically remains constant, while a clear competition between ASE and free EXs spontaneous emission is present, which suggests that ASE is due to stimulated emission from the free EXs.
abstract_unstemmed	Over the past decade, interest about metal halide perovskites has rapidly increased, as they can find wide application in optoelectronic devices. Nevertheless, although thermal evaporation is crucial for the development and engineering of such devices based on multilayer structures, the optical properties of thermally deposited perovskite layers (spontaneous and amplified spontaneous emission) have been poorly investigated. This paper is a study from a nano- to micro- and macro-scale about the role of light-emitting species (namely free carriers and excitons) and trap states in the spontaneous emission of thermally evaporated thin layers of CH<sub<3</sub<NH<sub<3</sub<PbBr<sub<3</sub< perovskite after wet air UV light trap passivation. The map of light emission from grains, carried out by SNOM at the nanoscale and by micro-PL techniques, clearly indicates that free and localized excitons (EXs) are the dominant light-emitting species, the localized excitons being the dominant ones in the presence of crystallites. These species also have a key role in the amplified spontaneous emission (ASE) process: for higher excitation densities, the relative contribution of localized EXs basically remains constant, while a clear competition between ASE and free EXs spontaneous emission is present, which suggests that ASE is due to stimulated emission from the free EXs.
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container_issue	2, p 211
title_short	Light Emission Properties of Thermally Evaporated CH<sub<3</sub<NH<sub<3</sub<PbBr<sub<3</sub< Perovskite from Nano- to Macro-Scale: Role of Free and Localized Excitons
url	https://doi.org/10.3390/nano12020211 https://doaj.org/article/4dcdb20ae1cc4b4d9d31cae10dfa0252 https://www.mdpi.com/2079-4991/12/2/211 https://doaj.org/toc/2079-4991
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author2	Maria Luisa De Giorgi Antonella Lorusso Arianna Cretì Saveria Santangelo Mauro Lomascolo Marco Anni Marco Mazzeo Salvatore Patané
author2Str	Maria Luisa De Giorgi Antonella Lorusso Arianna Cretì Saveria Santangelo Mauro Lomascolo Marco Anni Marco Mazzeo Salvatore Patané
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up_date	2024-07-03T18:14:47.874Z
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Nevertheless, although thermal evaporation is crucial for the development and engineering of such devices based on multilayer structures, the optical properties of thermally deposited perovskite layers (spontaneous and amplified spontaneous emission) have been poorly investigated. This paper is a study from a nano- to micro- and macro-scale about the role of light-emitting species (namely free carriers and excitons) and trap states in the spontaneous emission of thermally evaporated thin layers of CH<sub<3</sub<NH<sub<3</sub<PbBr<sub<3</sub< perovskite after wet air UV light trap passivation. The map of light emission from grains, carried out by SNOM at the nanoscale and by micro-PL techniques, clearly indicates that free and localized excitons (EXs) are the dominant light-emitting species, the localized excitons being the dominant ones in the presence of crystallites. 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Light Emission Properties of Thermally Evaporated CH<sub<3</sub<NH<sub<3</sub<PbBr<sub<3</sub< Perovskite from Nano- to Macro-Scale: Role of Free and Localized Excitons

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