Pressure-controlled luminescence in fast-response barium fluoride crystals

Cadatal-Raduban, Marilou; Mui, Luong Viet; Yamashita, Masahiro; Shibazaki, Yuki; Shimizu, Toshihiko; Sarukura, Nobuhiko; Yamanoi, Kohei

doi:https://doi.org/10.1038/s41427-024-00570-8

Pressure-controlled luminescence in fast-response barium fluoride crystals

Cadatal-Raduban, Marilou; Mui, Luong Viet; Yamashita, Masahiro et al.

NPG Asia Materials, 2024, 16, 50

Number of Access:879（2025-08-14 18:26 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/98356

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Title	Pressure-controlled luminescence in fast-response barium fluoride crystals
Creator	CreatorName Cadatal-Raduban, Marilou
	NRID 1000050813317 1000050813317 ORCID 0000-0002-3073-5409 0000-0002-3073-5409 Scopus Author ID 55442916900 55442916900 CreatorName Mui, Luong Viet
	CreatorName Yamashita, Masahiro
	NRID 1000010730830 1000010730830 CreatorName Shibazaki, Yuki
	NRID 1000080415182 1000080415182 researchmap permalink shimizu-tshk shimizu-tshk Scopus Author ID 35446354400 35446354400 CreatorName Shimizu, Toshihiko
	NRID 1000040260202 1000040260202 researchmap permalink read0051054 read0051054 Scopus Author ID 56251140500 56251140500 CreatorName Sarukura, Nobuhiko
	NRID 1000030722813 1000030722813 ORCID 0000-0003-4492-4099 0000-0003-4492-4099 researchmap permalink yamanoi-k yamanoi-k Scopus Author ID 35243839300 35243839300 CreatorName Yamanoi, Kohei
Description	Cadatal-Raduban M., Mui L.V., Yamashita M., et al. Pressure-controlled luminescence in fast-response barium fluoride crystals. NPG Asia Materials 16, 50 (2024); https://doi.org/10.1038/s41427-024-00570-8.
Abstract	Cross-luminescence (CL) in a barium fluoride (BaF₂) scintillator arising from the recombination of a valence band electron and a core band hole results in a fast picosecond decay time. However, the CL emission wavelength in the vacuum ultraviolet region is difficult to detect, and intrinsically intense and slow nanosecond self-trapped exciton (STE) luminescence occurs. Herein, we report a redshift in the CL emission wavelength with high-pressure application. The wavelength of the CL emission shifted from 221 nm to 240 nm when 5.0 GPa was applied via a sapphire anvil cell. Increasing the pressure decreases the core-valence bandgap due to the downward expansion of the valence band, resulting in a decrease in the valence band minimum. The onset of a phase transition from a cubic crystal structure to an orthorhombic crystal structure at 3.7 GPa inhibited the recombination of conduction band electrons and self-trapped holes, leading to the disappearance of the STE emission. Manipulating the band structure of BaF₂ by high-pressure application enables control of its luminescence emission, providing a pathway toward solving the problems inherent in this leading fast-response scintillator.
Publisher	Nature Research
Source Title	NPG Asia Materials
Volume (Issue)	16
Page	50
Date of Issued	2024-10-11
Language	English
Handle URL	https://hdl.handle.net/11094/98356
PISSN	18844049
eISSN	18844057
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1038/s41427-024-00570-8
Access Rights	open access
CopyRight	This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version	Version of Record
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCTERMS.bibliographicCitation	NPG Asia Materials. 2024, 16, p. 50
DC.title	Pressure-controlled luminescence in fast-response barium fluoride crystals
DC.creator	Cadatal-Raduban, Marilou
	Mui, Luong Viet
	Yamashita, Masahiro
	Shibazaki, Yuki
	Shimizu, Toshihiko
	Sarukura, Nobuhiko
	Yamanoi, Kohei
DC.publisher	Nature Research
DC.language' scheme='DCTERMS.RFC1766	English
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2024-10-11
DC.identifier	https://doi.org/10.1038/s41427-024-00570-8
DC.description	Cadatal-Raduban M., Mui L.V., Yamashita M., et al. Pressure-controlled luminescence in fast-response barium fluoride crystals. NPG Asia Materials 16, 50 (2024); https://doi.org/10.1038/s41427-024-00570-8.
DCTERMS.abstract	Cross-luminescence (CL) in a barium fluoride (BaF₂) scintillator arising from the recombination of a valence band electron and a core band hole results in a fast picosecond decay time. However, the CL emission wavelength in the vacuum ultraviolet region is difficult to detect, and intrinsically intense and slow nanosecond self-trapped exciton (STE) luminescence occurs. Herein, we report a redshift in the CL emission wavelength with high-pressure application. The wavelength of the CL emission shifted from 221 nm to 240 nm when 5.0 GPa was applied via a sapphire anvil cell. Increasing the pressure decreases the core-valence bandgap due to the downward expansion of the valence band, resulting in a decrease in the valence band minimum. The onset of a phase transition from a cubic crystal structure to an orthorhombic crystal structure at 3.7 GPa inhibited the recombination of conduction band electrons and self-trapped holes, leading to the disappearance of the STE emission. Manipulating the band structure of BaF₂ by high-pressure application enables control of its luminescence emission, providing a pathway toward solving the problems inherent in this leading fast-response scintillator.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	98356
citation_title	Pressure-controlled luminescence in fast-response barium fluoride crystals
citation_author	Cadatal-Raduban, Marilou
	Mui, Luong Viet
	Yamashita, Masahiro
	Shibazaki, Yuki
	Shimizu, Toshihiko
	Sarukura, Nobuhiko
	Yamanoi, Kohei
citation_publisher	Nature Research
citation_language	English
citation_date	2024-10-11
citation_journal_title	NPG Asia Materials
citation_volume	16
citation_firstpage	50
citation_doi	https://doi.org/10.1038/s41427-024-00570-8
citation_public_url	https://hdl.handle.net/11094/98356

Pressure-controlled luminescence in fast-response barium fluoride crystals

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