Remarkable flux effect of Li-codoping on highly enhanced luminescence of orthosilicate Ba2SiO4: Eu2+ phosphors for NUV-LEDs: Autonomous impurity purification by eutectic Li2CO3 melts

Donghyeon Kim, Ki Wan Jeon, Jong Sung Jin, Seong Gu Kang, Dong Kyun Seo, Jung Chul Park

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We report large photoluminescence (PL) enhancement of green-emitting Ba2SiO4:Eu2+ phosphors prepared in an eutectic Li2CO3 melt as a flux. Among the phosphor materials synthesized using low-purity precursors (99%-pure BaCO3 and 99.6%-pure SiO2), the emission intensity of Ba2SiO4:(Li0.02,Eu0.02) (Li = 200% excess) is found to be 470% as high as that of Ba2SiO4:Eu0.02 (no-Li) and in fact is almost equivalent to that of Li-undoped Ba2SiO4:Eu2+ synthesized using ultrapure precursors (99.98%-pure BaCO3 and 99.995%-pure SiO2). In combination with the results from PL measurements and inductively coupled plasma mass spectrometry (ICP-MS), the elemental distribution of the products and melts found from time-of-flight secondary ion mass spectrometry (TOF-SIMS) directly indicates that the excess Li2CO3 autonomously removes the impurities that were originally contained in the low-purity precursors, in particular SiO2, and thus critically improves the photoluminescence efficiency of the material. The newly found Li flux effect on large PL enhancement may not only contribute to more economic production of phosphors but provide a platform for discovery of new efficient phosphors for solid state lighting.

Original languageEnglish
Pages (from-to)105339-105346
Number of pages8
JournalRSC Advances
Volume5
Issue number127
DOIs
Publication statusPublished - Dec 1 2015

Fingerprint

Phosphors
Eutectics
Purification
Light emitting diodes
Luminescence
Photoluminescence
Impurities
Fluxes
Inductively coupled plasma mass spectrometry
Secondary ion mass spectrometry
Lighting
Economics

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Remarkable flux effect of Li-codoping on highly enhanced luminescence of orthosilicate Ba2SiO4 : Eu2+ phosphors for NUV-LEDs: Autonomous impurity purification by eutectic Li2CO3 melts. / Kim, Donghyeon; Jeon, Ki Wan; Jin, Jong Sung; Kang, Seong Gu; Seo, Dong Kyun; Park, Jung Chul.

In: RSC Advances, Vol. 5, No. 127, 01.12.2015, p. 105339-105346.

Research output: Contribution to journalArticle

@article{9bb7f56dd0534f09bb1b38bd971a5a25,
title = "Remarkable flux effect of Li-codoping on highly enhanced luminescence of orthosilicate Ba2SiO4: Eu2+ phosphors for NUV-LEDs: Autonomous impurity purification by eutectic Li2CO3 melts",
abstract = "We report large photoluminescence (PL) enhancement of green-emitting Ba2SiO4:Eu2+ phosphors prepared in an eutectic Li2CO3 melt as a flux. Among the phosphor materials synthesized using low-purity precursors (99{\%}-pure BaCO3 and 99.6{\%}-pure SiO2), the emission intensity of Ba2SiO4:(Li0.02,Eu0.02) (Li = 200{\%} excess) is found to be 470{\%} as high as that of Ba2SiO4:Eu0.02 (no-Li) and in fact is almost equivalent to that of Li-undoped Ba2SiO4:Eu2+ synthesized using ultrapure precursors (99.98{\%}-pure BaCO3 and 99.995{\%}-pure SiO2). In combination with the results from PL measurements and inductively coupled plasma mass spectrometry (ICP-MS), the elemental distribution of the products and melts found from time-of-flight secondary ion mass spectrometry (TOF-SIMS) directly indicates that the excess Li2CO3 autonomously removes the impurities that were originally contained in the low-purity precursors, in particular SiO2, and thus critically improves the photoluminescence efficiency of the material. The newly found Li flux effect on large PL enhancement may not only contribute to more economic production of phosphors but provide a platform for discovery of new efficient phosphors for solid state lighting.",
author = "Donghyeon Kim and Jeon, {Ki Wan} and Jin, {Jong Sung} and Kang, {Seong Gu} and Seo, {Dong Kyun} and Park, {Jung Chul}",
year = "2015",
month = "12",
day = "1",
doi = "10.1039/c5ra19712k",
language = "English",
volume = "5",
pages = "105339--105346",
journal = "RSC Advances",
issn = "2046-2069",
publisher = "Royal Society of Chemistry",
number = "127",

}

TY - JOUR

T1 - Remarkable flux effect of Li-codoping on highly enhanced luminescence of orthosilicate Ba2SiO4

T2 - Eu2+ phosphors for NUV-LEDs: Autonomous impurity purification by eutectic Li2CO3 melts

AU - Kim, Donghyeon

AU - Jeon, Ki Wan

AU - Jin, Jong Sung

AU - Kang, Seong Gu

AU - Seo, Dong Kyun

AU - Park, Jung Chul

PY - 2015/12/1

Y1 - 2015/12/1

N2 - We report large photoluminescence (PL) enhancement of green-emitting Ba2SiO4:Eu2+ phosphors prepared in an eutectic Li2CO3 melt as a flux. Among the phosphor materials synthesized using low-purity precursors (99%-pure BaCO3 and 99.6%-pure SiO2), the emission intensity of Ba2SiO4:(Li0.02,Eu0.02) (Li = 200% excess) is found to be 470% as high as that of Ba2SiO4:Eu0.02 (no-Li) and in fact is almost equivalent to that of Li-undoped Ba2SiO4:Eu2+ synthesized using ultrapure precursors (99.98%-pure BaCO3 and 99.995%-pure SiO2). In combination with the results from PL measurements and inductively coupled plasma mass spectrometry (ICP-MS), the elemental distribution of the products and melts found from time-of-flight secondary ion mass spectrometry (TOF-SIMS) directly indicates that the excess Li2CO3 autonomously removes the impurities that were originally contained in the low-purity precursors, in particular SiO2, and thus critically improves the photoluminescence efficiency of the material. The newly found Li flux effect on large PL enhancement may not only contribute to more economic production of phosphors but provide a platform for discovery of new efficient phosphors for solid state lighting.

AB - We report large photoluminescence (PL) enhancement of green-emitting Ba2SiO4:Eu2+ phosphors prepared in an eutectic Li2CO3 melt as a flux. Among the phosphor materials synthesized using low-purity precursors (99%-pure BaCO3 and 99.6%-pure SiO2), the emission intensity of Ba2SiO4:(Li0.02,Eu0.02) (Li = 200% excess) is found to be 470% as high as that of Ba2SiO4:Eu0.02 (no-Li) and in fact is almost equivalent to that of Li-undoped Ba2SiO4:Eu2+ synthesized using ultrapure precursors (99.98%-pure BaCO3 and 99.995%-pure SiO2). In combination with the results from PL measurements and inductively coupled plasma mass spectrometry (ICP-MS), the elemental distribution of the products and melts found from time-of-flight secondary ion mass spectrometry (TOF-SIMS) directly indicates that the excess Li2CO3 autonomously removes the impurities that were originally contained in the low-purity precursors, in particular SiO2, and thus critically improves the photoluminescence efficiency of the material. The newly found Li flux effect on large PL enhancement may not only contribute to more economic production of phosphors but provide a platform for discovery of new efficient phosphors for solid state lighting.

UR - http://www.scopus.com/inward/record.url?scp=84951140075&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84951140075&partnerID=8YFLogxK

U2 - 10.1039/c5ra19712k

DO - 10.1039/c5ra19712k

M3 - Article

AN - SCOPUS:84951140075

VL - 5

SP - 105339

EP - 105346

JO - RSC Advances

JF - RSC Advances

SN - 2046-2069

IS - 127

ER -