Dynamics of radio-photoluminescence and thermally-stimulated luminescence in KBr:Sm

Go Okada; Yutaka Fujimoto; Hironori Tanaka; Safa Kasap; Takayuki Yanagida

doi:10.1007/s10854-017-7496-z

Dynamics of radio-photoluminescence and thermally-stimulated luminescence in KBr:Sm

Go Okada, Yutaka Fujimoto, Hironori Tanaka, Safa Kasap, Takayuki Yanagida

ENG - Applied Chemistry

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Sm-doped KBr single crystals were prepared by the Bridgman–Stockbarger technique. The samples show both radio-photoluminescence (RPL) and thermally-stimulated luminescence (TSL). The RPL is due to the valence change of the Sm ion (Sm³⁺ → Sm²⁺), induced by X-rays, so the photoluminescence emission by Sm²⁺ appears as a result of irradiation and the intensity increases with the irradiation dose. The emission of Sm²⁺ is due to the 5d–4f transitions. The RPL response seems to be related with the thermally-stimulated luminescence (TSL) on the same samples. The TSL emission is predominantly due to Sm²⁺, instead of Sm³⁺, indicating that capture of a hole by Sm²⁺ takes place. As a result of TSL (or heat treatment), Sm²⁺ reverts to Sm³⁺ as the original state. The thermal activation energies have been derived from TSL isothermal analyses, and the obtained values are 1.42, 1.55, 1.65, and 1.74 eV.

Original language	English
Pages (from-to)	15980-15986
Number of pages	7
Journal	Journal of Materials Science: Materials in Electronics
Volume	28
Issue number	21
DOIs	https://doi.org/10.1007/s10854-017-7496-z
Publication status	Published - 2017 Nov 1

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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@article{977ca569811649d9b291a264febaf6de,

title = "Dynamics of radio-photoluminescence and thermally-stimulated luminescence in KBr:Sm",

abstract = "Sm-doped KBr single crystals were prepared by the Bridgman–Stockbarger technique. The samples show both radio-photoluminescence (RPL) and thermally-stimulated luminescence (TSL). The RPL is due to the valence change of the Sm ion (Sm3+ → Sm2+), induced by X-rays, so the photoluminescence emission by Sm2+ appears as a result of irradiation and the intensity increases with the irradiation dose. The emission of Sm2+ is due to the 5d–4f transitions. The RPL response seems to be related with the thermally-stimulated luminescence (TSL) on the same samples. The TSL emission is predominantly due to Sm2+, instead of Sm3+, indicating that capture of a hole by Sm2+ takes place. As a result of TSL (or heat treatment), Sm2+ reverts to Sm3+ as the original state. The thermal activation energies have been derived from TSL isothermal analyses, and the obtained values are 1.42, 1.55, 1.65, and 1.74 eV.",

author = "Go Okada and Yutaka Fujimoto and Hironori Tanaka and Safa Kasap and Takayuki Yanagida",

year = "2017",

month = nov,

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T1 - Dynamics of radio-photoluminescence and thermally-stimulated luminescence in KBr:Sm

AU - Okada, Go

AU - Fujimoto, Yutaka

AU - Tanaka, Hironori

AU - Kasap, Safa

AU - Yanagida, Takayuki

PY - 2017/11/1

Y1 - 2017/11/1

N2 - Sm-doped KBr single crystals were prepared by the Bridgman–Stockbarger technique. The samples show both radio-photoluminescence (RPL) and thermally-stimulated luminescence (TSL). The RPL is due to the valence change of the Sm ion (Sm3+ → Sm2+), induced by X-rays, so the photoluminescence emission by Sm2+ appears as a result of irradiation and the intensity increases with the irradiation dose. The emission of Sm2+ is due to the 5d–4f transitions. The RPL response seems to be related with the thermally-stimulated luminescence (TSL) on the same samples. The TSL emission is predominantly due to Sm2+, instead of Sm3+, indicating that capture of a hole by Sm2+ takes place. As a result of TSL (or heat treatment), Sm2+ reverts to Sm3+ as the original state. The thermal activation energies have been derived from TSL isothermal analyses, and the obtained values are 1.42, 1.55, 1.65, and 1.74 eV.

AB - Sm-doped KBr single crystals were prepared by the Bridgman–Stockbarger technique. The samples show both radio-photoluminescence (RPL) and thermally-stimulated luminescence (TSL). The RPL is due to the valence change of the Sm ion (Sm3+ → Sm2+), induced by X-rays, so the photoluminescence emission by Sm2+ appears as a result of irradiation and the intensity increases with the irradiation dose. The emission of Sm2+ is due to the 5d–4f transitions. The RPL response seems to be related with the thermally-stimulated luminescence (TSL) on the same samples. The TSL emission is predominantly due to Sm2+, instead of Sm3+, indicating that capture of a hole by Sm2+ takes place. As a result of TSL (or heat treatment), Sm2+ reverts to Sm3+ as the original state. The thermal activation energies have been derived from TSL isothermal analyses, and the obtained values are 1.42, 1.55, 1.65, and 1.74 eV.

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