In situ XPS investigation of the X-ray-triggered decomposition of perovskites in ultrahigh vacuum condition

Abstract X-ray photoelectron spectroscopy (XPS) has been used to investigate the composition of perovskite films upon exposure to different environmental factors, such as moisture, heat, and UV light. However, few research studies have determined that the X-ray itself could cause damage to the perov...

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Autores principales:	Wei-Chun Lin, Wei-Chun Lo, Jun-Xian Li, Yi-Kai Wang, Jui-Fu Tang, Zi-Yun Fong
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/cb882418bc3f4188817a3f90488a7e6d
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spelling	oai:doaj.org-article:cb882418bc3f4188817a3f90488a7e6d2021-12-02T14:23:23ZIn situ XPS investigation of the X-ray-triggered decomposition of perovskites in ultrahigh vacuum condition10.1038/s41529-021-00162-92397-2106https://doaj.org/article/cb882418bc3f4188817a3f90488a7e6d2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41529-021-00162-9https://doaj.org/toc/2397-2106Abstract X-ray photoelectron spectroscopy (XPS) has been used to investigate the composition of perovskite films upon exposure to different environmental factors, such as moisture, heat, and UV light. However, few research studies have determined that the X-ray itself could cause damage to the perovskite crystals. In this study, the X-ray-induced degradation of CH3NH3PbI3 perovskite films was investigated via XPS within an in situ ultrahigh vacuum system. It is demonstrated that fresh methylammonium lead iodine contains Pb2+ without the initial existence of Pb0. The Pb0 signal was discovered after a few hours of soft X-ray exposure, which indicates that the CH3NH3PbI3 perovskite structure undergoes a decomposition process to form metallic Pb. In addition, the nitrogen content was found to be significantly decreasing in the first hour of X-ray exposure. The discovery of the X-ray-induced chemical state change and the volatile methylamine of perovskite crystals could be further applied as an indicator for the field of X-ray sensors or detectors.Wei-Chun LinWei-Chun LoJun-Xian LiYi-Kai WangJui-Fu TangZi-Yun FongNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ENnpj Materials Degradation, Vol 5, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Wei-Chun Lin Wei-Chun Lo Jun-Xian Li Yi-Kai Wang Jui-Fu Tang Zi-Yun Fong In situ XPS investigation of the X-ray-triggered decomposition of perovskites in ultrahigh vacuum condition
description	Abstract X-ray photoelectron spectroscopy (XPS) has been used to investigate the composition of perovskite films upon exposure to different environmental factors, such as moisture, heat, and UV light. However, few research studies have determined that the X-ray itself could cause damage to the perovskite crystals. In this study, the X-ray-induced degradation of CH3NH3PbI3 perovskite films was investigated via XPS within an in situ ultrahigh vacuum system. It is demonstrated that fresh methylammonium lead iodine contains Pb2+ without the initial existence of Pb0. The Pb0 signal was discovered after a few hours of soft X-ray exposure, which indicates that the CH3NH3PbI3 perovskite structure undergoes a decomposition process to form metallic Pb. In addition, the nitrogen content was found to be significantly decreasing in the first hour of X-ray exposure. The discovery of the X-ray-induced chemical state change and the volatile methylamine of perovskite crystals could be further applied as an indicator for the field of X-ray sensors or detectors.
format	article
author	Wei-Chun Lin Wei-Chun Lo Jun-Xian Li Yi-Kai Wang Jui-Fu Tang Zi-Yun Fong
author_facet	Wei-Chun Lin Wei-Chun Lo Jun-Xian Li Yi-Kai Wang Jui-Fu Tang Zi-Yun Fong
author_sort	Wei-Chun Lin
title	In situ XPS investigation of the X-ray-triggered decomposition of perovskites in ultrahigh vacuum condition
title_short	In situ XPS investigation of the X-ray-triggered decomposition of perovskites in ultrahigh vacuum condition
title_full	In situ XPS investigation of the X-ray-triggered decomposition of perovskites in ultrahigh vacuum condition
title_fullStr	In situ XPS investigation of the X-ray-triggered decomposition of perovskites in ultrahigh vacuum condition
title_full_unstemmed	In situ XPS investigation of the X-ray-triggered decomposition of perovskites in ultrahigh vacuum condition
title_sort	in situ xps investigation of the x-ray-triggered decomposition of perovskites in ultrahigh vacuum condition
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/cb882418bc3f4188817a3f90488a7e6d
work_keys_str_mv	AT weichunlin insituxpsinvestigationofthexraytriggereddecompositionofperovskitesinultrahighvacuumcondition AT weichunlo insituxpsinvestigationofthexraytriggereddecompositionofperovskitesinultrahighvacuumcondition AT junxianli insituxpsinvestigationofthexraytriggereddecompositionofperovskitesinultrahighvacuumcondition AT yikaiwang insituxpsinvestigationofthexraytriggereddecompositionofperovskitesinultrahighvacuumcondition AT juifutang insituxpsinvestigationofthexraytriggereddecompositionofperovskitesinultrahighvacuumcondition AT ziyunfong insituxpsinvestigationofthexraytriggereddecompositionofperovskitesinultrahighvacuumcondition
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In situ XPS investigation of the X-ray-triggered decomposition of perovskites in ultrahigh vacuum condition

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