Controlled pore growth for enhanced photoluminescence of ceramic phosphors

Barak Ratzker; Avital Wagner; Sergey Kalabukhov; Nachum Frage

doi:10.1016/j.scriptamat.2021.114008

Controlled pore growth for enhanced photoluminescence of ceramic phosphors

Barak Ratzker, Avital Wagner, Sergey Kalabukhov, Nachum Frage

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

18 Scopus citations

Abstract

Ceramic phosphors have great potential as high-power color converters for solid-state lighting. The strive for developing increasingly bright and efficient phosphors stimulates research on scattering effects within phosphor media to enhance photoluminescence (PL). In the present study, we demonstrated a simple manner to improve PL properties of Ce:YAG transparent ceramic phosphors fabricated by spark plasma sintering. Controlled pore growth was achieved by post-sintering heat treatments, utilizing high-pressured gas trapped within residual pores to induce swelling. After heat treatment, the emission intensity and efficiency increased substantially. This is a promising method for microstructure tailoring to enhance PL and realize more effective ceramic phosphors.

Original language	English
Article number	114008
Journal	Scripta Materialia
Volume	202
DOIs	https://doi.org/10.1016/j.scriptamat.2021.114008
State	Published - 1 Sep 2021

Keywords

Ce:YAG
Ceramic phosphor
Photoluminescence
Porosity
Spark plasma sintering

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2021.114008

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title = "Controlled pore growth for enhanced photoluminescence of ceramic phosphors",

abstract = "Ceramic phosphors have great potential as high-power color converters for solid-state lighting. The strive for developing increasingly bright and efficient phosphors stimulates research on scattering effects within phosphor media to enhance photoluminescence (PL). In the present study, we demonstrated a simple manner to improve PL properties of Ce:YAG transparent ceramic phosphors fabricated by spark plasma sintering. Controlled pore growth was achieved by post-sintering heat treatments, utilizing high-pressured gas trapped within residual pores to induce swelling. After heat treatment, the emission intensity and efficiency increased substantially. This is a promising method for microstructure tailoring to enhance PL and realize more effective ceramic phosphors.",

keywords = "Ce:YAG, Ceramic phosphor, Photoluminescence, Porosity, Spark plasma sintering",

author = "Barak Ratzker and Avital Wagner and Sergey Kalabukhov and Nachum Frage",

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T1 - Controlled pore growth for enhanced photoluminescence of ceramic phosphors

AU - Ratzker, Barak

AU - Wagner, Avital

AU - Kalabukhov, Sergey

AU - Frage, Nachum

PY - 2021/9/1

Y1 - 2021/9/1

N2 - Ceramic phosphors have great potential as high-power color converters for solid-state lighting. The strive for developing increasingly bright and efficient phosphors stimulates research on scattering effects within phosphor media to enhance photoluminescence (PL). In the present study, we demonstrated a simple manner to improve PL properties of Ce:YAG transparent ceramic phosphors fabricated by spark plasma sintering. Controlled pore growth was achieved by post-sintering heat treatments, utilizing high-pressured gas trapped within residual pores to induce swelling. After heat treatment, the emission intensity and efficiency increased substantially. This is a promising method for microstructure tailoring to enhance PL and realize more effective ceramic phosphors.

AB - Ceramic phosphors have great potential as high-power color converters for solid-state lighting. The strive for developing increasingly bright and efficient phosphors stimulates research on scattering effects within phosphor media to enhance photoluminescence (PL). In the present study, we demonstrated a simple manner to improve PL properties of Ce:YAG transparent ceramic phosphors fabricated by spark plasma sintering. Controlled pore growth was achieved by post-sintering heat treatments, utilizing high-pressured gas trapped within residual pores to induce swelling. After heat treatment, the emission intensity and efficiency increased substantially. This is a promising method for microstructure tailoring to enhance PL and realize more effective ceramic phosphors.

KW - Ce:YAG

KW - Ceramic phosphor

KW - Photoluminescence

KW - Porosity

KW - Spark plasma sintering

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M3 - Article

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VL - 202

JO - Scripta Materialia

JF - Scripta Materialia

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Controlled pore growth for enhanced photoluminescence of ceramic phosphors

Abstract

Keywords

ASJC Scopus subject areas

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