Enhanced luminescence of Sr 2SiO 4:Dy 3+ by sensitization (Ce 3+/Bi 3+) and its composition-induced phase transition

Le Zhang; Pengde Han; Kun Wang; Zhou Lu; Lixi Wang; Yunfeng Zhu; Qitu Zhang

doi:10.1016/j.jallcom.2012.06.125

Enhanced luminescence of Sr ₂SiO ₄:Dy ³⁺ by sensitization (Ce ³⁺/Bi ³⁺) and its composition-induced phase transition

Le Zhang, Pengde Han, Kun Wang, Zhou Lu, Lixi Wang, Yunfeng Zhu, Qitu Zhang

College of Materials Science and Engineering

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

27 Scopus citations

Abstract

Ce ³⁺/Bi ³⁺ codoped Sr ₂SiO ₄:Dy ³⁺ phosphors were prepared by the solid-state reaction method using NH ₄Cl as the flux. Their phase compositions, photoluminescence properties and the energy transfer processes were systematically investigated. The composition-induced phase transition of (Sr _0.99-xR _x) ₂SiO ₄:Dy ³⁺ (R = Ce ³⁺/Bi ³⁺) powders was dependent on the radius of doped ions and their concentrations. The doping of smaller ions was beneficial to the formation of α′-Sr ₂SiO ₄. The luminescence intensity of Dy ³⁺ was enhanced 2 or 3 times by the sensitization of Bi ³⁺/Ce ³⁺ through the electric multipoles interaction. The bright white light was observed from the Sr ₂SiO ₄:Dy,Bi phosphors with stable CIE chromaticity coordinates. This phosphor has great potential to act as a single-matrix phosphor for white light emitting diodes.

Original language	English
Pages (from-to)	54-59
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	541
DOIs	https://doi.org/10.1016/j.jallcom.2012.06.125
State	Published - 15 Nov 2012

Keywords

Codoping
Phase transition
Sensitization
Sr SiO :Dy
White light emitting diodes

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10.1016/j.jallcom.2012.06.125

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@article{87feb91b12e348a5b3ba82da86e95457,

title = "Enhanced luminescence of Sr 2SiO 4:Dy 3+ by sensitization (Ce 3+/Bi 3+) and its composition-induced phase transition",

abstract = "Ce 3+/Bi 3+ codoped Sr 2SiO 4:Dy 3+ phosphors were prepared by the solid-state reaction method using NH 4Cl as the flux. Their phase compositions, photoluminescence properties and the energy transfer processes were systematically investigated. The composition-induced phase transition of (Sr 0.99-xR x) 2SiO 4:Dy 3+ (R = Ce 3+/Bi 3+) powders was dependent on the radius of doped ions and their concentrations. The doping of smaller ions was beneficial to the formation of α′-Sr 2SiO 4. The luminescence intensity of Dy 3+ was enhanced 2 or 3 times by the sensitization of Bi 3+/Ce 3+ through the electric multipoles interaction. The bright white light was observed from the Sr 2SiO 4:Dy,Bi phosphors with stable CIE chromaticity coordinates. This phosphor has great potential to act as a single-matrix phosphor for white light emitting diodes.",

keywords = "Codoping, Phase transition, Sensitization, Sr SiO :Dy, White light emitting diodes",

author = "Le Zhang and Pengde Han and Kun Wang and Zhou Lu and Lixi Wang and Yunfeng Zhu and Qitu Zhang",

year = "2012",

month = nov,

day = "15",

doi = "10.1016/j.jallcom.2012.06.125",

language = "英语",

volume = "541",

pages = "54--59",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Enhanced luminescence of Sr 2SiO 4:Dy 3+ by sensitization (Ce 3+/Bi 3+) and its composition-induced phase transition

AU - Zhang, Le

AU - Han, Pengde

AU - Wang, Kun

AU - Lu, Zhou

AU - Wang, Lixi

AU - Zhu, Yunfeng

AU - Zhang, Qitu

PY - 2012/11/15

Y1 - 2012/11/15

N2 - Ce 3+/Bi 3+ codoped Sr 2SiO 4:Dy 3+ phosphors were prepared by the solid-state reaction method using NH 4Cl as the flux. Their phase compositions, photoluminescence properties and the energy transfer processes were systematically investigated. The composition-induced phase transition of (Sr 0.99-xR x) 2SiO 4:Dy 3+ (R = Ce 3+/Bi 3+) powders was dependent on the radius of doped ions and their concentrations. The doping of smaller ions was beneficial to the formation of α′-Sr 2SiO 4. The luminescence intensity of Dy 3+ was enhanced 2 or 3 times by the sensitization of Bi 3+/Ce 3+ through the electric multipoles interaction. The bright white light was observed from the Sr 2SiO 4:Dy,Bi phosphors with stable CIE chromaticity coordinates. This phosphor has great potential to act as a single-matrix phosphor for white light emitting diodes.

AB - Ce 3+/Bi 3+ codoped Sr 2SiO 4:Dy 3+ phosphors were prepared by the solid-state reaction method using NH 4Cl as the flux. Their phase compositions, photoluminescence properties and the energy transfer processes were systematically investigated. The composition-induced phase transition of (Sr 0.99-xR x) 2SiO 4:Dy 3+ (R = Ce 3+/Bi 3+) powders was dependent on the radius of doped ions and their concentrations. The doping of smaller ions was beneficial to the formation of α′-Sr 2SiO 4. The luminescence intensity of Dy 3+ was enhanced 2 or 3 times by the sensitization of Bi 3+/Ce 3+ through the electric multipoles interaction. The bright white light was observed from the Sr 2SiO 4:Dy,Bi phosphors with stable CIE chromaticity coordinates. This phosphor has great potential to act as a single-matrix phosphor for white light emitting diodes.

KW - Codoping

KW - Phase transition

KW - Sensitization

KW - Sr SiO :Dy

KW - White light emitting diodes

UR - http://www.scopus.com/inward/record.url?scp=84864806967&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2012.06.125

DO - 10.1016/j.jallcom.2012.06.125

M3 - 文章

AN - SCOPUS:84864806967

SN - 0925-8388

VL - 541

SP - 54

EP - 59

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Enhanced luminescence of Sr ₂SiO ₄:Dy ³⁺ by sensitization (Ce ³⁺/Bi ³⁺) and its composition-induced phase transition

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Keywords

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