Effect of disorder on transport properties in a tight-binding model for lead halide perovskites

Abstract The hybrid organic-inorganic lead halide perovskite materials have emerged as remarkable materials for photovoltaic applications. Their strengths include good electric transport properties in spite of the disorder inherent in them. Motivated by this observation, we analyze the effects of di...

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Autores principales:	S. Ashhab, O. Voznyy, S. Hoogland, E. H. Sargent, M. E. Madjet
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7fdd9354b7a44e048acae943164daa58
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spelling	oai:doaj.org-article:7fdd9354b7a44e048acae943164daa582021-12-02T11:52:19ZEffect of disorder on transport properties in a tight-binding model for lead halide perovskites10.1038/s41598-017-09442-42045-2322https://doaj.org/article/7fdd9354b7a44e048acae943164daa582017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09442-4https://doaj.org/toc/2045-2322Abstract The hybrid organic-inorganic lead halide perovskite materials have emerged as remarkable materials for photovoltaic applications. Their strengths include good electric transport properties in spite of the disorder inherent in them. Motivated by this observation, we analyze the effects of disorder on the energy eigenstates of a tight-binding model of these materials. In particular, we analyze the spatial extension of the energy eigenstates, which is quantified by the inverse participation ratio. This parameter exhibits a tendency, and possibly a phase transition, to localization as the on-site energy disorder strength is increased. However, we argue that the disorder in the lead halide perovskites corresponds to a point in the regime of highly delocalized states. Our results also suggest that the electronic states of mixed-halide materials tend to be more localized than those of pure materials, which suggests a weaker tendency to form extended bonding states in the mixed-halide materials and is therefore not favourable for halide mixing.S. AshhabO. VoznyyS. HooglandE. H. SargentM. E. MadjetNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q S. Ashhab O. Voznyy S. Hoogland E. H. Sargent M. E. Madjet Effect of disorder on transport properties in a tight-binding model for lead halide perovskites
description	Abstract The hybrid organic-inorganic lead halide perovskite materials have emerged as remarkable materials for photovoltaic applications. Their strengths include good electric transport properties in spite of the disorder inherent in them. Motivated by this observation, we analyze the effects of disorder on the energy eigenstates of a tight-binding model of these materials. In particular, we analyze the spatial extension of the energy eigenstates, which is quantified by the inverse participation ratio. This parameter exhibits a tendency, and possibly a phase transition, to localization as the on-site energy disorder strength is increased. However, we argue that the disorder in the lead halide perovskites corresponds to a point in the regime of highly delocalized states. Our results also suggest that the electronic states of mixed-halide materials tend to be more localized than those of pure materials, which suggests a weaker tendency to form extended bonding states in the mixed-halide materials and is therefore not favourable for halide mixing.
format	article
author	S. Ashhab O. Voznyy S. Hoogland E. H. Sargent M. E. Madjet
author_facet	S. Ashhab O. Voznyy S. Hoogland E. H. Sargent M. E. Madjet
author_sort	S. Ashhab
title	Effect of disorder on transport properties in a tight-binding model for lead halide perovskites
title_short	Effect of disorder on transport properties in a tight-binding model for lead halide perovskites
title_full	Effect of disorder on transport properties in a tight-binding model for lead halide perovskites
title_fullStr	Effect of disorder on transport properties in a tight-binding model for lead halide perovskites
title_full_unstemmed	Effect of disorder on transport properties in a tight-binding model for lead halide perovskites
title_sort	effect of disorder on transport properties in a tight-binding model for lead halide perovskites
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7fdd9354b7a44e048acae943164daa58
work_keys_str_mv	AT sashhab effectofdisorderontransportpropertiesinatightbindingmodelforleadhalideperovskites AT ovoznyy effectofdisorderontransportpropertiesinatightbindingmodelforleadhalideperovskites AT shoogland effectofdisorderontransportpropertiesinatightbindingmodelforleadhalideperovskites AT ehsargent effectofdisorderontransportpropertiesinatightbindingmodelforleadhalideperovskites AT memadjet effectofdisorderontransportpropertiesinatightbindingmodelforleadhalideperovskites
_version_	1718395112947449856

Effect of disorder on transport properties in a tight-binding model for lead halide perovskites

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