Fabrication and optical properties of NUV-emitting SiO2-SrB4O7:Eu2+ glass-ceramic thin films

Chie Iwamoto; Shinobu Fujihara

doi:10.1016/j.optmat.2009.03.008

Fabrication and optical properties of NUV-emitting SiO₂-SrB₄O₇:Eu²⁺ glass-ceramic thin films

Chie Iwamoto, Shinobu Fujihara

Department of Applied Chemistry

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

8 Citations (Scopus)

Abstract

SiO₂-SrB₄O₇:Eu²⁺ glass-ceramic thin films were fabricated for possible application in near ultraviolet (NUV) emitting devices. Nano-sized SrB₄O₇:Eu²⁺ powders were prepared by a Pechini-type sol-gel method and a subsequent ball-milling treatment. The powders showed NUV emissions centered at 367 nm, upon irradiation with UV of shorter wavelengths, due to an allowed 4f⁶5d¹ → 4f⁷ electronic transition of Eu²⁺ ions. The glass-ceramic thin films were prepared by dip-coating of tetraethylorthosilicate (TEOS) solutions dispersed with the nano-sized SrB₄O₇:Eu²⁺ powders and a subsequent heat-treatment. It was found that the glass-ceramic thin films had relatively high thermal stability up to 800 °C in terms of the Eu²⁺ emissions. SiO₂ layers surrounding SrB₄O₇:Eu²⁺ appeared to be effective for the surface passivation of the phosphor particles.

Original language	English
Pages (from-to)	1614-1619
Number of pages	6
Journal	Optical Materials
Volume	31
Issue number	11
DOIs	https://doi.org/10.1016/j.optmat.2009.03.008
Publication status	Published - 2009 Sept

Keywords

Glass-ceramics
Phosphor
UV materials

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Computer Science(all)
Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Electrical and Electronic Engineering

Access to Document

10.1016/j.optmat.2009.03.008

Cite this

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title = "Fabrication and optical properties of NUV-emitting SiO2-SrB4O7:Eu2+ glass-ceramic thin films",

abstract = "SiO2-SrB4O7:Eu2+ glass-ceramic thin films were fabricated for possible application in near ultraviolet (NUV) emitting devices. Nano-sized SrB4O7:Eu2+ powders were prepared by a Pechini-type sol-gel method and a subsequent ball-milling treatment. The powders showed NUV emissions centered at 367 nm, upon irradiation with UV of shorter wavelengths, due to an allowed 4f65d1 → 4f7 electronic transition of Eu2+ ions. The glass-ceramic thin films were prepared by dip-coating of tetraethylorthosilicate (TEOS) solutions dispersed with the nano-sized SrB4O7:Eu2+ powders and a subsequent heat-treatment. It was found that the glass-ceramic thin films had relatively high thermal stability up to 800 °C in terms of the Eu2+ emissions. SiO2 layers surrounding SrB4O7:Eu2+ appeared to be effective for the surface passivation of the phosphor particles.",

keywords = "Glass-ceramics, Phosphor, UV materials",

author = "Chie Iwamoto and Shinobu Fujihara",

year = "2009",

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doi = "10.1016/j.optmat.2009.03.008",

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pages = "1614--1619",

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T1 - Fabrication and optical properties of NUV-emitting SiO2-SrB4O7:Eu2+ glass-ceramic thin films

AU - Iwamoto, Chie

AU - Fujihara, Shinobu

PY - 2009/9

Y1 - 2009/9

N2 - SiO2-SrB4O7:Eu2+ glass-ceramic thin films were fabricated for possible application in near ultraviolet (NUV) emitting devices. Nano-sized SrB4O7:Eu2+ powders were prepared by a Pechini-type sol-gel method and a subsequent ball-milling treatment. The powders showed NUV emissions centered at 367 nm, upon irradiation with UV of shorter wavelengths, due to an allowed 4f65d1 → 4f7 electronic transition of Eu2+ ions. The glass-ceramic thin films were prepared by dip-coating of tetraethylorthosilicate (TEOS) solutions dispersed with the nano-sized SrB4O7:Eu2+ powders and a subsequent heat-treatment. It was found that the glass-ceramic thin films had relatively high thermal stability up to 800 °C in terms of the Eu2+ emissions. SiO2 layers surrounding SrB4O7:Eu2+ appeared to be effective for the surface passivation of the phosphor particles.

AB - SiO2-SrB4O7:Eu2+ glass-ceramic thin films were fabricated for possible application in near ultraviolet (NUV) emitting devices. Nano-sized SrB4O7:Eu2+ powders were prepared by a Pechini-type sol-gel method and a subsequent ball-milling treatment. The powders showed NUV emissions centered at 367 nm, upon irradiation with UV of shorter wavelengths, due to an allowed 4f65d1 → 4f7 electronic transition of Eu2+ ions. The glass-ceramic thin films were prepared by dip-coating of tetraethylorthosilicate (TEOS) solutions dispersed with the nano-sized SrB4O7:Eu2+ powders and a subsequent heat-treatment. It was found that the glass-ceramic thin films had relatively high thermal stability up to 800 °C in terms of the Eu2+ emissions. SiO2 layers surrounding SrB4O7:Eu2+ appeared to be effective for the surface passivation of the phosphor particles.

KW - Glass-ceramics

KW - Phosphor

KW - UV materials

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