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The Relation of Phase‐Transition Effects and Thermal Stability of Planar Perovskite Solar Cells

A power conversion efficiency of over 20% has been achieved in CH(3)NH(3)PbI(3)‐based perovskite solar cells (PSC), however, low thermal stability associated with the presence of a phase transition between tetragonal and cubic structures near room temperature is a major issue that must be overcome f...

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Autores principales: Qin, Chuanjiang, Matsushima, Toshinori, Klotz, Dino, Fujihara, Takashi, Adachi, Chihaya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6325570/
https://www.ncbi.nlm.nih.gov/pubmed/30643717
http://dx.doi.org/10.1002/advs.201801079
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author Qin, Chuanjiang
Matsushima, Toshinori
Klotz, Dino
Fujihara, Takashi
Adachi, Chihaya
author_facet Qin, Chuanjiang
Matsushima, Toshinori
Klotz, Dino
Fujihara, Takashi
Adachi, Chihaya
author_sort Qin, Chuanjiang
collection PubMed
description A power conversion efficiency of over 20% has been achieved in CH(3)NH(3)PbI(3)‐based perovskite solar cells (PSC), however, low thermal stability associated with the presence of a phase transition between tetragonal and cubic structures near room temperature is a major issue that must be overcome for future practical applications. Here, the influence of the phase transition on the thermal stability of PSCs is investigated in detail by comparing four kinds of perovskite films with different compositions of halogen atoms and organic components. Thermally stimulated current measurements reveal that a large number of carrier traps are generated in solar cells with the perovskite CH(3)NH(3)PbI(3) as a light absorber after operation at 85 °C, which is higher than the phase‐transition temperature. Electrochemical impedance spectroscopy measurements further exclude effects of a possible morphology change on the formation of carrier traps. These carrier traps are detrimental to the thermal stability. The thermogravimetric analysis does not show a decomposition for any of the materials in the temperature range relevant for operation. The perovskite alloys do not have this phase transition, resulting in effectively suppressed formation of carrier traps. PSCs with improved thermal stability under the standard thermal cycling test are demonstrated.
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spelling pubmed-63255702019-01-14 The Relation of Phase‐Transition Effects and Thermal Stability of Planar Perovskite Solar Cells Qin, Chuanjiang Matsushima, Toshinori Klotz, Dino Fujihara, Takashi Adachi, Chihaya Adv Sci (Weinh) Communications A power conversion efficiency of over 20% has been achieved in CH(3)NH(3)PbI(3)‐based perovskite solar cells (PSC), however, low thermal stability associated with the presence of a phase transition between tetragonal and cubic structures near room temperature is a major issue that must be overcome for future practical applications. Here, the influence of the phase transition on the thermal stability of PSCs is investigated in detail by comparing four kinds of perovskite films with different compositions of halogen atoms and organic components. Thermally stimulated current measurements reveal that a large number of carrier traps are generated in solar cells with the perovskite CH(3)NH(3)PbI(3) as a light absorber after operation at 85 °C, which is higher than the phase‐transition temperature. Electrochemical impedance spectroscopy measurements further exclude effects of a possible morphology change on the formation of carrier traps. These carrier traps are detrimental to the thermal stability. The thermogravimetric analysis does not show a decomposition for any of the materials in the temperature range relevant for operation. The perovskite alloys do not have this phase transition, resulting in effectively suppressed formation of carrier traps. PSCs with improved thermal stability under the standard thermal cycling test are demonstrated. John Wiley and Sons Inc. 2018-10-25 /pmc/articles/PMC6325570/ /pubmed/30643717 http://dx.doi.org/10.1002/advs.201801079 Text en © 2018 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Communications
Qin, Chuanjiang
Matsushima, Toshinori
Klotz, Dino
Fujihara, Takashi
Adachi, Chihaya
The Relation of Phase‐Transition Effects and Thermal Stability of Planar Perovskite Solar Cells
title The Relation of Phase‐Transition Effects and Thermal Stability of Planar Perovskite Solar Cells
title_full The Relation of Phase‐Transition Effects and Thermal Stability of Planar Perovskite Solar Cells
title_fullStr The Relation of Phase‐Transition Effects and Thermal Stability of Planar Perovskite Solar Cells
title_full_unstemmed The Relation of Phase‐Transition Effects and Thermal Stability of Planar Perovskite Solar Cells
title_short The Relation of Phase‐Transition Effects and Thermal Stability of Planar Perovskite Solar Cells
title_sort relation of phase‐transition effects and thermal stability of planar perovskite solar cells
topic Communications
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6325570/
https://www.ncbi.nlm.nih.gov/pubmed/30643717
http://dx.doi.org/10.1002/advs.201801079
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