Effects of heat-treatment with a flux under reduced atmosphere on photoluminescence of orange-red emitting CaSrSiO4:Eu2+ phosphors

Tetsufumi Komukai; Jun Yokoyama; Yasushi Sato; Hideki Kato; Masato Kakihana

doi:10.2497/jjspm.63.835

Effects of heat-treatment with a flux under reduced atmosphere on photoluminescence of orange-red emitting CaSrSiO₄:Eu2⁺ phosphors

Tetsufumi Komukai, Jun Yokoyama, Yasushi Sato, Hideki Kato, Masato Kakihana

IMRAM - Division of Inorganic Material Research

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

1 Citation (Scopus)

Abstract

The effects of heat-treatments with various conditions such as temperature, atmosphere and luxing agents on photoluminescence properties of CaSiSiO₄:Eu²⁺ phosphors were investigated in detail. X-ray absorption fine structure of CaSrSiO₄:Eu²⁺ phosphors heat-treated at various temperatures revealed that the reduction from Eu³⁺ to Eu²⁺ in the precursor powder was effectively promoted at the temperatures higher than melting temperature of luxing agent. We found that red shift of emission peak was caused by pre-heat-treatment under a reduced atmosphere. The effect of fluxing agents such as BaCl₂, SrCl₂, CaCl₂ on photoluminescence properties of CaSrSiO₄:Eu²⁺ phosphor was also examined. The results indicate that CaSrSiO₄:Eu²⁺ phosphor heat-treated using BaCl₂ lux shows high emission eficiency. We also recognized that the small amounts of Ba²⁺ was incorporated into CaSrSiO₄ lattice due to the ion exchange.

Original language	English
Pages (from-to)	835-839
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	63
Issue number	9
DOIs	https://doi.org/10.2497/jjspm.63.835
Publication status	Published - 2016 Aug

Keywords

CaSrSiO:Eu
Heat treatment
Lux
Phosphor
Reduction

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10.2497/jjspm.63.835

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title = "Effects of heat-treatment with a flux under reduced atmosphere on photoluminescence of orange-red emitting CaSrSiO4:Eu2+ phosphors",

abstract = "The effects of heat-treatments with various conditions such as temperature, atmosphere and luxing agents on photoluminescence properties of CaSiSiO4:Eu2+ phosphors were investigated in detail. X-ray absorption fine structure of CaSrSiO4:Eu2+ phosphors heat-treated at various temperatures revealed that the reduction from Eu3+ to Eu2+ in the precursor powder was effectively promoted at the temperatures higher than melting temperature of luxing agent. We found that red shift of emission peak was caused by pre-heat-treatment under a reduced atmosphere. The effect of fluxing agents such as BaCl2, SrCl2, CaCl2 on photoluminescence properties of CaSrSiO4:Eu2+ phosphor was also examined. The results indicate that CaSrSiO4:Eu2+ phosphor heat-treated using BaCl2 lux shows high emission eficiency. We also recognized that the small amounts of Ba2+ was incorporated into CaSrSiO4 lattice due to the ion exchange.",

keywords = "CaSrSiO:Eu, Heat treatment, Lux, Phosphor, Reduction",

author = "Tetsufumi Komukai and Jun Yokoyama and Yasushi Sato and Hideki Kato and Masato Kakihana",

year = "2016",

month = aug,

doi = "10.2497/jjspm.63.835",

language = "English",

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journal = "Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy",

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number = "9",

}

Effects of heat-treatment with a flux under reduced atmosphere on photoluminescence of orange-red emitting CaSrSiO₄:Eu2⁺ phosphors. / Komukai, Tetsufumi; Yokoyama, Jun; Sato, Yasushi et al.
In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 63, No. 9, 08.2016, p. 835-839.

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

TY - JOUR

T1 - Effects of heat-treatment with a flux under reduced atmosphere on photoluminescence of orange-red emitting CaSrSiO4:Eu2+ phosphors

AU - Komukai, Tetsufumi

AU - Yokoyama, Jun

AU - Sato, Yasushi

AU - Kato, Hideki

AU - Kakihana, Masato

PY - 2016/8

Y1 - 2016/8

N2 - The effects of heat-treatments with various conditions such as temperature, atmosphere and luxing agents on photoluminescence properties of CaSiSiO4:Eu2+ phosphors were investigated in detail. X-ray absorption fine structure of CaSrSiO4:Eu2+ phosphors heat-treated at various temperatures revealed that the reduction from Eu3+ to Eu2+ in the precursor powder was effectively promoted at the temperatures higher than melting temperature of luxing agent. We found that red shift of emission peak was caused by pre-heat-treatment under a reduced atmosphere. The effect of fluxing agents such as BaCl2, SrCl2, CaCl2 on photoluminescence properties of CaSrSiO4:Eu2+ phosphor was also examined. The results indicate that CaSrSiO4:Eu2+ phosphor heat-treated using BaCl2 lux shows high emission eficiency. We also recognized that the small amounts of Ba2+ was incorporated into CaSrSiO4 lattice due to the ion exchange.

AB - The effects of heat-treatments with various conditions such as temperature, atmosphere and luxing agents on photoluminescence properties of CaSiSiO4:Eu2+ phosphors were investigated in detail. X-ray absorption fine structure of CaSrSiO4:Eu2+ phosphors heat-treated at various temperatures revealed that the reduction from Eu3+ to Eu2+ in the precursor powder was effectively promoted at the temperatures higher than melting temperature of luxing agent. We found that red shift of emission peak was caused by pre-heat-treatment under a reduced atmosphere. The effect of fluxing agents such as BaCl2, SrCl2, CaCl2 on photoluminescence properties of CaSrSiO4:Eu2+ phosphor was also examined. The results indicate that CaSrSiO4:Eu2+ phosphor heat-treated using BaCl2 lux shows high emission eficiency. We also recognized that the small amounts of Ba2+ was incorporated into CaSrSiO4 lattice due to the ion exchange.

KW - CaSrSiO:Eu

KW - Heat treatment

KW - Lux

KW - Phosphor

KW - Reduction

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Effects of heat-treatment with a flux under reduced atmosphere on photoluminescence of orange-red emitting CaSrSiO₄:Eu2⁺ phosphors

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