Chemical Pressure Control for Photoluminescence of MSiAl2O3N2: Ce3+/Eu2+ (M = Sr, Ba) Oxynitride Phosphors

Wan-Yu Huang; Fumitaka Yoshimura; Kyota Ueda; Yasuo Shimomura; Hwo-Shuenn Sheu; Ting-Shan Chan; Chang-Yang Chiang; Wuzong Zhou; Ru-Shi Liu

doi:10.1021/cm404058j

Chemical Pressure Control for Photoluminescence of MSiAl2O3N2: Ce3+/Eu2+ (M = Sr, Ba) Oxynitride Phosphors

Wan-Yu Huang, Fumitaka Yoshimura, Kyota Ueda, Yasuo Shimomura, Hwo-Shuenn Sheu, Ting-Shan Chan, Chang-Yang Chiang, Wuzong Zhou, Ru-Shi Liu^*

^*Corresponding author for this work

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

Abstract

Novel promising blue MSiAl2O3N2:Ce3+ (M = Sr, Ba) and green BaSiAl2O3N2:Eu2+ oxynitride phosphors with broad band emission for white light-emitting diodes are obtained in this study. The detailed energy transfer mechanism from Ce3+ to Eu2+ in SrSiAl2O3N2 is reported. Moreover, the unexpected red shift emission when the compositional variable x is increased from 0 to 0.92 in the Sr0.92-xBaxSiAl2O3N2:Ce-0.04(3+),Eu-0.04(2+) system is well investigated. The decrease in emission energy and the increase in thermal quenching barrier height of x are caused by a dominant chemical pressure compression effect on the activator sites, through which the replacement of Sr2+ (occupied by activators) by larger Ba2+ enhances the covalency of Sr-N/O bonding in spite of unit cell enlargement. The chemical pressure compression effect control for photoluminescence is verified by the ionic-radii equilibrium between 9-coordinate Sr-IX(2+) and (Ca-IX(2+), Ba-IX(2+)).

Original language	English
Pages (from-to)	2075-2085
Number of pages	11
Journal	Chemistry of Materials
Volume	26
Issue number	6
DOIs	https://doi.org/10.1021/cm404058j
Publication status	Published - 25 Mar 2014

Keywords

COLOR RENDERING INDEX
LIGHT-EMITTING-DIODES
WHITE LEDS
ENERGY-TRANSFER
EU2+
SIALONS
CE3+

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10.1021/cm404058j

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@article{4cdb1877af544bdd8feaf5d3f1f6f762,

title = "Chemical Pressure Control for Photoluminescence of MSiAl2O3N2: Ce3+/Eu2+ (M = Sr, Ba) Oxynitride Phosphors",

abstract = "Novel promising blue MSiAl2O3N2:Ce3+ (M = Sr, Ba) and green BaSiAl2O3N2:Eu2+ oxynitride phosphors with broad band emission for white light-emitting diodes are obtained in this study. The detailed energy transfer mechanism from Ce3+ to Eu2+ in SrSiAl2O3N2 is reported. Moreover, the unexpected red shift emission when the compositional variable x is increased from 0 to 0.92 in the Sr0.92-xBaxSiAl2O3N2:Ce-0.04(3+),Eu-0.04(2+) system is well investigated. The decrease in emission energy and the increase in thermal quenching barrier height of x are caused by a dominant chemical pressure compression effect on the activator sites, through which the replacement of Sr2+ (occupied by activators) by larger Ba2+ enhances the covalency of Sr-N/O bonding in spite of unit cell enlargement. The chemical pressure compression effect control for photoluminescence is verified by the ionic-radii equilibrium between 9-coordinate Sr-IX(2+) and (Ca-IX(2+), Ba-IX(2+)).",

keywords = "COLOR RENDERING INDEX, LIGHT-EMITTING-DIODES, WHITE LEDS, ENERGY-TRANSFER, EU2+, SIALONS, CE3+",

author = "Wan-Yu Huang and Fumitaka Yoshimura and Kyota Ueda and Yasuo Shimomura and Hwo-Shuenn Sheu and Ting-Shan Chan and Chang-Yang Chiang and Wuzong Zhou and Ru-Shi Liu",

year = "2014",

month = mar,

day = "25",

doi = "10.1021/cm404058j",

language = "English",

volume = "26",

pages = "2075--2085",

journal = "Chemistry of Materials",

issn = "0897-4756",

publisher = "American Chemical Society (ACS)",

number = "6",

}

TY - JOUR

T1 - Chemical Pressure Control for Photoluminescence of MSiAl2O3N2

T2 - Ce3+/Eu2+ (M = Sr, Ba) Oxynitride Phosphors

AU - Huang, Wan-Yu

AU - Yoshimura, Fumitaka

AU - Ueda, Kyota

AU - Shimomura, Yasuo

AU - Sheu, Hwo-Shuenn

AU - Chan, Ting-Shan

AU - Chiang, Chang-Yang

AU - Zhou, Wuzong

AU - Liu, Ru-Shi

PY - 2014/3/25

Y1 - 2014/3/25

N2 - Novel promising blue MSiAl2O3N2:Ce3+ (M = Sr, Ba) and green BaSiAl2O3N2:Eu2+ oxynitride phosphors with broad band emission for white light-emitting diodes are obtained in this study. The detailed energy transfer mechanism from Ce3+ to Eu2+ in SrSiAl2O3N2 is reported. Moreover, the unexpected red shift emission when the compositional variable x is increased from 0 to 0.92 in the Sr0.92-xBaxSiAl2O3N2:Ce-0.04(3+),Eu-0.04(2+) system is well investigated. The decrease in emission energy and the increase in thermal quenching barrier height of x are caused by a dominant chemical pressure compression effect on the activator sites, through which the replacement of Sr2+ (occupied by activators) by larger Ba2+ enhances the covalency of Sr-N/O bonding in spite of unit cell enlargement. The chemical pressure compression effect control for photoluminescence is verified by the ionic-radii equilibrium between 9-coordinate Sr-IX(2+) and (Ca-IX(2+), Ba-IX(2+)).

AB - Novel promising blue MSiAl2O3N2:Ce3+ (M = Sr, Ba) and green BaSiAl2O3N2:Eu2+ oxynitride phosphors with broad band emission for white light-emitting diodes are obtained in this study. The detailed energy transfer mechanism from Ce3+ to Eu2+ in SrSiAl2O3N2 is reported. Moreover, the unexpected red shift emission when the compositional variable x is increased from 0 to 0.92 in the Sr0.92-xBaxSiAl2O3N2:Ce-0.04(3+),Eu-0.04(2+) system is well investigated. The decrease in emission energy and the increase in thermal quenching barrier height of x are caused by a dominant chemical pressure compression effect on the activator sites, through which the replacement of Sr2+ (occupied by activators) by larger Ba2+ enhances the covalency of Sr-N/O bonding in spite of unit cell enlargement. The chemical pressure compression effect control for photoluminescence is verified by the ionic-radii equilibrium between 9-coordinate Sr-IX(2+) and (Ca-IX(2+), Ba-IX(2+)).

KW - COLOR RENDERING INDEX

KW - LIGHT-EMITTING-DIODES

KW - WHITE LEDS

KW - ENERGY-TRANSFER

KW - EU2+

KW - SIALONS

KW - CE3+

U2 - 10.1021/cm404058j

DO - 10.1021/cm404058j

M3 - Article

SN - 0897-4756

VL - 26

SP - 2075

EP - 2085

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 6

ER -

Chemical Pressure Control for Photoluminescence of MSiAl2O3N2: Ce3+/Eu2+ (M = Sr, Ba) Oxynitride Phosphors

Abstract

Keywords

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