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Tuning Charge Carrier Dynamics and Surface Passivation in Organolead Halide Perovskites with Capping Ligands and Metal Oxide Interfaces

Robert Godin, Xuerui Ma, Soranyel González-Carrero, Tian Du, Xiaoe Li, Chieh-Ting Lin, Martyn A. McLachlan, Raquel E. Galian, Julia Pérez-Prieto, James Durrant Orcid Logo

Advanced Optical Materials, Start page: 1701203

Swansea University Author: James Durrant Orcid Logo

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DOI (Published version): 10.1002/adom.201701203

Abstract

Organolead halide perovskites have emerged as exciting optoelectronic materials but a complete understanding of their photophysical properties is still lacking. Here, a morphological series of methylammonium lead bromide (MAPbBr3) perovskites are studied by transient optical spectroscopies over eigh...

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Published in: Advanced Optical Materials
ISSN: 2195-1071
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa38328
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first_indexed 2018-01-29T14:30:12Z
last_indexed 2018-02-12T14:24:20Z
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spelling 2018-02-09T09:47:45.2823454 v2 38328 2018-01-29 Tuning Charge Carrier Dynamics and Surface Passivation in Organolead Halide Perovskites with Capping Ligands and Metal Oxide Interfaces f3dd64bc260e5c07adfa916c27dbd58a 0000-0001-8353-7345 James Durrant James Durrant true false 2018-01-29 MTLS Organolead halide perovskites have emerged as exciting optoelectronic materials but a complete understanding of their photophysical properties is still lacking. Here, a morphological series of methylammonium lead bromide (MAPbBr3) perovskites are studied by transient optical spectroscopies over eight orders of magnitude in timescale to investigate the effect of nanostructuring and surface states on the charge carrier dynamics. The sample preparation route and corresponding morphology changes influence the position of the optical features, recombination dynamics, excitation fluence dependence, and dramatically impact surface trap passivation. Growth of the perovskite layer in the presence of capping ligands or within mesoporous alumina increases the photoluminescence efficiency by multiple orders of magnitude, indicating that interfacing with metal oxides can lead to the passivation of surface nonradiative recombination centers. Nanoparticles (NPs) dispersed in solution show mixed behavior since they consist of NPs on nanoplatelets, while isolated NPs could be grown within mesoporous alumina with the addition of capping ligands. Investigation on the microsecond timescale suggests that an exponential distribution of states below the band edges results in long-lived charges. The investigations of the relationship between sample architecture and charge carrier dynamics will help in the appropriate choice of perovskite morphology for use in optoelectronic devices. Journal Article Advanced Optical Materials 1701203 2195-1071 morphology; optoelectronic materials; organolead halide perovskites; surface passivation; transient optical spectroscopies 31 12 2018 2018-12-31 10.1002/adom.201701203 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2018-02-09T09:47:45.2823454 2018-01-29T10:34:51.4016699 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Robert Godin 1 Xuerui Ma 2 Soranyel González-Carrero 3 Tian Du 4 Xiaoe Li 5 Chieh-Ting Lin 6 Martyn A. McLachlan 7 Raquel E. Galian 8 Julia Pérez-Prieto 9 James Durrant 0000-0001-8353-7345 10
title Tuning Charge Carrier Dynamics and Surface Passivation in Organolead Halide Perovskites with Capping Ligands and Metal Oxide Interfaces
spellingShingle Tuning Charge Carrier Dynamics and Surface Passivation in Organolead Halide Perovskites with Capping Ligands and Metal Oxide Interfaces
James Durrant
title_short Tuning Charge Carrier Dynamics and Surface Passivation in Organolead Halide Perovskites with Capping Ligands and Metal Oxide Interfaces
title_full Tuning Charge Carrier Dynamics and Surface Passivation in Organolead Halide Perovskites with Capping Ligands and Metal Oxide Interfaces
title_fullStr Tuning Charge Carrier Dynamics and Surface Passivation in Organolead Halide Perovskites with Capping Ligands and Metal Oxide Interfaces
title_full_unstemmed Tuning Charge Carrier Dynamics and Surface Passivation in Organolead Halide Perovskites with Capping Ligands and Metal Oxide Interfaces
title_sort Tuning Charge Carrier Dynamics and Surface Passivation in Organolead Halide Perovskites with Capping Ligands and Metal Oxide Interfaces
author_id_str_mv f3dd64bc260e5c07adfa916c27dbd58a
author_id_fullname_str_mv f3dd64bc260e5c07adfa916c27dbd58a_***_James Durrant
author James Durrant
author2 Robert Godin
Xuerui Ma
Soranyel González-Carrero
Tian Du
Xiaoe Li
Chieh-Ting Lin
Martyn A. McLachlan
Raquel E. Galian
Julia Pérez-Prieto
James Durrant
format Journal article
container_title Advanced Optical Materials
container_start_page 1701203
publishDate 2018
institution Swansea University
issn 2195-1071
doi_str_mv 10.1002/adom.201701203
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 0
active_str 0
description Organolead halide perovskites have emerged as exciting optoelectronic materials but a complete understanding of their photophysical properties is still lacking. Here, a morphological series of methylammonium lead bromide (MAPbBr3) perovskites are studied by transient optical spectroscopies over eight orders of magnitude in timescale to investigate the effect of nanostructuring and surface states on the charge carrier dynamics. The sample preparation route and corresponding morphology changes influence the position of the optical features, recombination dynamics, excitation fluence dependence, and dramatically impact surface trap passivation. Growth of the perovskite layer in the presence of capping ligands or within mesoporous alumina increases the photoluminescence efficiency by multiple orders of magnitude, indicating that interfacing with metal oxides can lead to the passivation of surface nonradiative recombination centers. Nanoparticles (NPs) dispersed in solution show mixed behavior since they consist of NPs on nanoplatelets, while isolated NPs could be grown within mesoporous alumina with the addition of capping ligands. Investigation on the microsecond timescale suggests that an exponential distribution of states below the band edges results in long-lived charges. The investigations of the relationship between sample architecture and charge carrier dynamics will help in the appropriate choice of perovskite morphology for use in optoelectronic devices.
published_date 2018-12-31T03:48:29Z
_version_ 1763752342322151424
score 11.013686

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