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Shape- and excitation-dependent charge-carrier dynamics in colloidal MAPbI perovskites as nanostripes, nanosheets and nanoplatelets

Eugen Klein, Chris Rehhagen Orcid Logo, Rostyslav Lesyuk, Christian Klinke

Journal of Materials Chemistry C, Volume: 11, Issue: 28, Pages: 9495 - 9503

Swansea University Author: Christian Klinke

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DOI (Published version): 10.1039/d3tc00463e

Abstract

Nanostructured lead halide perovskites are an attractive group of materials for highly efficient optoelectronic applications. Considering the wide variety in shape, size and crystal structures (layered, non-layered, hollow, double), many different excited-state population and relaxation processes ca...

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Published in: Journal of Materials Chemistry C
ISSN: 2050-7526 2050-7534
Published: Royal Society of Chemistry (RSC) 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa63776
first_indexed 2023-08-09T10:34:57Z
last_indexed 2024-11-25T14:12:54Z
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spelling 2024-07-29T15:19:12.2424361 v2 63776 2023-07-05 Shape- and excitation-dependent charge-carrier dynamics in colloidal MAPbI perovskites as nanostripes, nanosheets and nanoplatelets c10c44238eabfb203111f88a965f5372 Christian Klinke Christian Klinke true false 2023-07-05 Nanostructured lead halide perovskites are an attractive group of materials for highly efficient optoelectronic applications. Considering the wide variety in shape, size and crystal structures (layered, non-layered, hollow, double), many different excited-state population and relaxation processes can be present, such as exciton formation, free charge carrier generation, exciton–exciton annihilation, and Auger recombination. Here, we present the synthesis of nanostructures with different morphology to improve the optical properties of methylammonium lead iodide and to investigate the corresponding charge-carrier dynamics and recombination processes. Excitation intensity dependent time-resolved photoluminescence (PL) measurements are performed to highlight the PL decay behaviour of nanosheets, nanoplatelets, and nanostripes. In all three cases a faster decay rate is observed with increasing excitation fluence. This behaviour can be attributed to the occurrence of bimolecular recombination of electrons and holes in nanosheets and exciton–exciton annihilation in nanostripes with high carrier densities. Performing these measurements at low excitation intensities revealed unusual long charge-carrier lifetimes of a few microseconds. Additionally, the nanostripes showed the best results in terms of photoluminescence quantum yield of up to 75% and the nanosheets demonstrate improved stability. The nanoplatelets are considered as intermediate structures between nanosheets and nanostripes – balancing quantum yield and stability. Journal Article Journal of Materials Chemistry C 11 28 9495 9503 Royal Society of Chemistry (RSC) 2050-7526 2050-7534 Colloidal synthesis, methylammonium lead iodide, nanostructures, spectroscopy, exciton-exciton annihilation 20 6 2023 2023-06-20 10.1039/d3tc00463e COLLEGE NANME COLLEGE CODE Swansea University The authors thank the Sylvia Speller group and Regina Lange for providing the AFM setup. Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) is acknowledged for funding of SFB 1477 "Light-Matter Interactions at Interfaces", project number 441234705. We also acknowledge the European Regional Development Fund of the European Union for funding the PL spectrometer (GHS20-0035/P000376218) and X-ray diffractometer (GHS-20-0036/P000379642) and the Deutsche Forschungsgemeinschaft (DFG) for funding an electron microscope Jeol NeoARM TEM (INST 264/161-1 FUGG) and an electron microscope ThermoFisher Talos L120C (INST 264/188-1 FUGG). 2024-07-29T15:19:12.2424361 2023-07-05T07:34:19.1781246 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemistry Eugen Klein 1 Chris Rehhagen 0000-0001-5308-7910 2 Rostyslav Lesyuk 3 Christian Klinke 4 63776__28038__2aa85bc5997b420c924dc2c3af380edf.pdf Klein-Klinke-Manuscript-revised-withoutMarkups.pdf 2023-07-05T07:35:35.8894335 Output 1288026 application/pdf Accepted Manuscript true 2024-06-20T00:00:00.0000000 true eng
title Shape- and excitation-dependent charge-carrier dynamics in colloidal MAPbI perovskites as nanostripes, nanosheets and nanoplatelets
spellingShingle Shape- and excitation-dependent charge-carrier dynamics in colloidal MAPbI perovskites as nanostripes, nanosheets and nanoplatelets
Christian Klinke
title_short Shape- and excitation-dependent charge-carrier dynamics in colloidal MAPbI perovskites as nanostripes, nanosheets and nanoplatelets
title_full Shape- and excitation-dependent charge-carrier dynamics in colloidal MAPbI perovskites as nanostripes, nanosheets and nanoplatelets
title_fullStr Shape- and excitation-dependent charge-carrier dynamics in colloidal MAPbI perovskites as nanostripes, nanosheets and nanoplatelets
title_full_unstemmed Shape- and excitation-dependent charge-carrier dynamics in colloidal MAPbI perovskites as nanostripes, nanosheets and nanoplatelets
title_sort Shape- and excitation-dependent charge-carrier dynamics in colloidal MAPbI perovskites as nanostripes, nanosheets and nanoplatelets
author_id_str_mv c10c44238eabfb203111f88a965f5372
author_id_fullname_str_mv c10c44238eabfb203111f88a965f5372_***_Christian Klinke
author Christian Klinke
author2 Eugen Klein
Chris Rehhagen
Rostyslav Lesyuk
Christian Klinke
format Journal article
container_title Journal of Materials Chemistry C
container_volume 11
container_issue 28
container_start_page 9495
publishDate 2023
institution Swansea University
issn 2050-7526
2050-7534
doi_str_mv 10.1039/d3tc00463e
publisher Royal Society of Chemistry (RSC)
college_str Faculty of Science and Engineering
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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 - Chemistry{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemistry
document_store_str 1
active_str 0
description Nanostructured lead halide perovskites are an attractive group of materials for highly efficient optoelectronic applications. Considering the wide variety in shape, size and crystal structures (layered, non-layered, hollow, double), many different excited-state population and relaxation processes can be present, such as exciton formation, free charge carrier generation, exciton–exciton annihilation, and Auger recombination. Here, we present the synthesis of nanostructures with different morphology to improve the optical properties of methylammonium lead iodide and to investigate the corresponding charge-carrier dynamics and recombination processes. Excitation intensity dependent time-resolved photoluminescence (PL) measurements are performed to highlight the PL decay behaviour of nanosheets, nanoplatelets, and nanostripes. In all three cases a faster decay rate is observed with increasing excitation fluence. This behaviour can be attributed to the occurrence of bimolecular recombination of electrons and holes in nanosheets and exciton–exciton annihilation in nanostripes with high carrier densities. Performing these measurements at low excitation intensities revealed unusual long charge-carrier lifetimes of a few microseconds. Additionally, the nanostripes showed the best results in terms of photoluminescence quantum yield of up to 75% and the nanosheets demonstrate improved stability. The nanoplatelets are considered as intermediate structures between nanosheets and nanostripes – balancing quantum yield and stability.
published_date 2023-06-20T08:22:46Z
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score 11.04748

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