Ferroelectric domains may Lead to two-dimensional confinement of holes, but not of electrons, in CH3NH3PbI3 perovskite

Palacios Clemente, Pablo and Wahnón Benarroch, Perla and Montero-alejo, Ana L. and Menendez-proupin, E. and Conesa, J. C. (2017). Ferroelectric domains may Lead to two-dimensional confinement of holes, but not of electrons, in CH3NH3PbI3 perovskite. "Journal of Physical Chemistry C", v. 121 (n. 48); pp. 26698-26705. ISSN 1932-7447. https://doi.org/10.1021/acs.jpcc.7b09625.

Description

Title: Ferroelectric domains may Lead to two-dimensional confinement of holes, but not of electrons, in CH3NH3PbI3 perovskite
Author/s:
  • Palacios Clemente, Pablo
  • Wahnón Benarroch, Perla
  • Montero-alejo, Ana L.
  • Menendez-proupin, E.
  • Conesa, J. C.
Item Type: Article
Título de Revista/Publicación: Journal of Physical Chemistry C
Date: 2017
ISSN: 1932-7447
Volume: 121
Subjects:
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Física Aplicada a las Ingenierías Aeronáutica y Naval
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

We investigate the possibility that formation of ferroelectric domains in CH3NH3PbI3 can separate the diffusion pathways of electrons and holes. This hypothesis has been proposed to explain the large recombination time and the remarkable performance of solar cells of hybrid perovskites. We find that a twodimensional hole confinement in CH3NH3PbI3 is possible under room-temperatureconditions. Our models of the tetragonal phase show that the alignment of dipole layers of organic cations induces the confinement of holes but not of electrons. This behavior does not change even when the strength of the ordered dipoles is varied. The confinement of holes is favored by asymmetric deformation of the inorganic framework triggered by its interaction with the organic cations. However, the lattice distortions counteract the effect of the oriented organic dipoles, preventing the localization of electrons.

Funding Projects

TypeCodeAcronymLeaderTitle
Madrid Regional GovernmentS2013/MAE-2780UnspecifiedMartín Vega, AntonioMateriales, dispositivos y tecnología para el desarrollo de la industria fotovoltaica
Government of SpainENE2016-77798-C4-4-RUnspecifiedUnspecifiedAprovechamiento de luz solar mediante un proceso de dos fotones

More information

Item ID: 50178
DC Identifier: http://oa.upm.es/50178/
OAI Identifier: oai:oa.upm.es:50178
DOI: 10.1021/acs.jpcc.7b09625
Official URL: https://pubs.acs.org/doi/10.1021/acs.jpcc.7b09625
Deposited by: Memoria Investigacion
Deposited on: 03 Apr 2019 08:21
Last Modified: 18 Mar 2020 09:01
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