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Revealing the charge carrier kinetics in perovskite solar cells affected by mesoscopic structures and defect states from simple transient photovoltage measurements

This report shows that, by using simple transient photovoltage (TPV) measurements, we can reveal a significant correlation between the TPV decay characteristics and the performance of these perovskite solar cells. TPV decay seems to be composed of a rising part in a short interval after photoexcitat...

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Autores principales: Hidayat, Rahmat, Nurunnizar, Adhita Asma, Fariz, Alvin, Herman, Rosa, Erlyta Septa, Shobih, Oizumi, Tomohisa, Fujii, Akihiko, Ozaki, Masanori
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7645725/
https://www.ncbi.nlm.nih.gov/pubmed/33154419
http://dx.doi.org/10.1038/s41598-020-74603-x
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author Hidayat, Rahmat
Nurunnizar, Adhita Asma
Fariz, Alvin
Herman
Rosa, Erlyta Septa
Shobih
Oizumi, Tomohisa
Fujii, Akihiko
Ozaki, Masanori
author_facet Hidayat, Rahmat
Nurunnizar, Adhita Asma
Fariz, Alvin
Herman
Rosa, Erlyta Septa
Shobih
Oizumi, Tomohisa
Fujii, Akihiko
Ozaki, Masanori
author_sort Hidayat, Rahmat
collection PubMed
description This report shows that, by using simple transient photovoltage (TPV) measurements, we can reveal a significant correlation between the TPV decay characteristics and the performance of these perovskite solar cells. TPV decay seems to be composed of a rising part in a short interval after photoexcitation and a long decaying part that extends up to tens of milliseconds. These decay behaviors look different depending on the mesoscopic structures and the perovskite morphology formed therein, as seen from their Scanning Electron Microcopy images and X-ray diffraction patterns. The decay part can be fitted with a three-exponential decay, which reflects different kinetics of electrons in the perovskite/TiO(2) layer. On the other hand, the rising part must be fit by a decay equation derived by employing the convolution theorem, where the rising part can be assigned to the electron transport process inside the perovskite layer and the decaying part can be assigned to electron back-transfer. The characteristics can be then understood by considering the effect of crystal defects and trap states in the perovskite grains and perovskite interface with its transport layer, which is TiO(2) in this study. Although the TPV decay occurs in a time range much longer than the primary process of photoexcitation as commonly observed in transient photoluminescence spectroscopy, the processes involved in this TPV strongly correlates with the performance of these perovskite solar cells.
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spelling pubmed-76457252020-11-06 Revealing the charge carrier kinetics in perovskite solar cells affected by mesoscopic structures and defect states from simple transient photovoltage measurements Hidayat, Rahmat Nurunnizar, Adhita Asma Fariz, Alvin Herman Rosa, Erlyta Septa Shobih Oizumi, Tomohisa Fujii, Akihiko Ozaki, Masanori Sci Rep Article This report shows that, by using simple transient photovoltage (TPV) measurements, we can reveal a significant correlation between the TPV decay characteristics and the performance of these perovskite solar cells. TPV decay seems to be composed of a rising part in a short interval after photoexcitation and a long decaying part that extends up to tens of milliseconds. These decay behaviors look different depending on the mesoscopic structures and the perovskite morphology formed therein, as seen from their Scanning Electron Microcopy images and X-ray diffraction patterns. The decay part can be fitted with a three-exponential decay, which reflects different kinetics of electrons in the perovskite/TiO(2) layer. On the other hand, the rising part must be fit by a decay equation derived by employing the convolution theorem, where the rising part can be assigned to the electron transport process inside the perovskite layer and the decaying part can be assigned to electron back-transfer. The characteristics can be then understood by considering the effect of crystal defects and trap states in the perovskite grains and perovskite interface with its transport layer, which is TiO(2) in this study. Although the TPV decay occurs in a time range much longer than the primary process of photoexcitation as commonly observed in transient photoluminescence spectroscopy, the processes involved in this TPV strongly correlates with the performance of these perovskite solar cells. Nature Publishing Group UK 2020-11-05 /pmc/articles/PMC7645725/ /pubmed/33154419 http://dx.doi.org/10.1038/s41598-020-74603-x Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Hidayat, Rahmat
Nurunnizar, Adhita Asma
Fariz, Alvin
Herman
Rosa, Erlyta Septa
Shobih
Oizumi, Tomohisa
Fujii, Akihiko
Ozaki, Masanori
Revealing the charge carrier kinetics in perovskite solar cells affected by mesoscopic structures and defect states from simple transient photovoltage measurements
title Revealing the charge carrier kinetics in perovskite solar cells affected by mesoscopic structures and defect states from simple transient photovoltage measurements
title_full Revealing the charge carrier kinetics in perovskite solar cells affected by mesoscopic structures and defect states from simple transient photovoltage measurements
title_fullStr Revealing the charge carrier kinetics in perovskite solar cells affected by mesoscopic structures and defect states from simple transient photovoltage measurements
title_full_unstemmed Revealing the charge carrier kinetics in perovskite solar cells affected by mesoscopic structures and defect states from simple transient photovoltage measurements
title_short Revealing the charge carrier kinetics in perovskite solar cells affected by mesoscopic structures and defect states from simple transient photovoltage measurements
title_sort revealing the charge carrier kinetics in perovskite solar cells affected by mesoscopic structures and defect states from simple transient photovoltage measurements
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7645725/
https://www.ncbi.nlm.nih.gov/pubmed/33154419
http://dx.doi.org/10.1038/s41598-020-74603-x
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