Facile fabrication of moisture resistance and thermally stable SrGa2S4:Eu2+ phosphor-in-glass microcubes for white LED

Yoon Hwa Kim, Paulraj Arunkumar, Won Bin Im

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

SrGa2S4:Eu2+ phosphor known for its moisture sensitivity was successfully fabricated into white light-emitting device (WLED) with enhanced moisture and thermal stability by the dicing of phosphor-in-glass (PiG) plate. Sulfide PiG plates were diced into 100×100 μm cubes which showed enhanced moisture resistance and thermal stability due to high thermal resistivity of the glass-based PiG encapsulant and design of PiG microcube. Moisture sensitivity test revealed that 95% of emission intensity was retained for sulfide PiG microcubes compared to 88% for powder phosphor even after 48 h. The WLED was fabricated with sulfide PiG microcubes under 450 nm GaN LED chip and showed CIE coordinates of (0.39, 0.39) with high CRI of 85 under operating current of 40 mA for conformal WLED packaging applications.

Original languageEnglish
Pages (from-to)5200-5204
Number of pages5
JournalCeramics International
Volume41
Issue number3
DOIs
StatePublished - 2015 Apr 1

Fingerprint

Phosphors
Light emitting diodes
Moisture
Fabrication
Glass
Sulfides
Thermodynamic stability
Powders
Thermal conductivity
Packaging

Keywords

  • Phosphor-in-glass
  • Photo-luminescence
  • PiG microcubes
  • Scatter-free phosphor

Cite this

@article{9632739c25f94464b1a5eb8750b8b9a5,
title = "Facile fabrication of moisture resistance and thermally stable SrGa2S4:Eu2+ phosphor-in-glass microcubes for white LED",
abstract = "SrGa2S4:Eu2+ phosphor known for its moisture sensitivity was successfully fabricated into white light-emitting device (WLED) with enhanced moisture and thermal stability by the dicing of phosphor-in-glass (PiG) plate. Sulfide PiG plates were diced into 100×100 μm cubes which showed enhanced moisture resistance and thermal stability due to high thermal resistivity of the glass-based PiG encapsulant and design of PiG microcube. Moisture sensitivity test revealed that 95{\%} of emission intensity was retained for sulfide PiG microcubes compared to 88{\%} for powder phosphor even after 48 h. The WLED was fabricated with sulfide PiG microcubes under 450 nm GaN LED chip and showed CIE coordinates of (0.39, 0.39) with high CRI of 85 under operating current of 40 mA for conformal WLED packaging applications.",
keywords = "Phosphor-in-glass, Photo-luminescence, PiG microcubes, Scatter-free phosphor",
author = "Kim, {Yoon Hwa} and Paulraj Arunkumar and Im, {Won Bin}",
year = "2015",
month = "4",
day = "1",
doi = "10.1016/j.ceramint.2014.12.048",
language = "English",
volume = "41",
pages = "5200--5204",
journal = "Ceramics International",
issn = "0272-8842",
number = "3",

}

Facile fabrication of moisture resistance and thermally stable SrGa2S4:Eu2+ phosphor-in-glass microcubes for white LED. / Kim, Yoon Hwa; Arunkumar, Paulraj; Im, Won Bin.

In: Ceramics International, Vol. 41, No. 3, 01.04.2015, p. 5200-5204.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Facile fabrication of moisture resistance and thermally stable SrGa2S4:Eu2+ phosphor-in-glass microcubes for white LED

AU - Kim, Yoon Hwa

AU - Arunkumar, Paulraj

AU - Im, Won Bin

PY - 2015/4/1

Y1 - 2015/4/1

N2 - SrGa2S4:Eu2+ phosphor known for its moisture sensitivity was successfully fabricated into white light-emitting device (WLED) with enhanced moisture and thermal stability by the dicing of phosphor-in-glass (PiG) plate. Sulfide PiG plates were diced into 100×100 μm cubes which showed enhanced moisture resistance and thermal stability due to high thermal resistivity of the glass-based PiG encapsulant and design of PiG microcube. Moisture sensitivity test revealed that 95% of emission intensity was retained for sulfide PiG microcubes compared to 88% for powder phosphor even after 48 h. The WLED was fabricated with sulfide PiG microcubes under 450 nm GaN LED chip and showed CIE coordinates of (0.39, 0.39) with high CRI of 85 under operating current of 40 mA for conformal WLED packaging applications.

AB - SrGa2S4:Eu2+ phosphor known for its moisture sensitivity was successfully fabricated into white light-emitting device (WLED) with enhanced moisture and thermal stability by the dicing of phosphor-in-glass (PiG) plate. Sulfide PiG plates were diced into 100×100 μm cubes which showed enhanced moisture resistance and thermal stability due to high thermal resistivity of the glass-based PiG encapsulant and design of PiG microcube. Moisture sensitivity test revealed that 95% of emission intensity was retained for sulfide PiG microcubes compared to 88% for powder phosphor even after 48 h. The WLED was fabricated with sulfide PiG microcubes under 450 nm GaN LED chip and showed CIE coordinates of (0.39, 0.39) with high CRI of 85 under operating current of 40 mA for conformal WLED packaging applications.

KW - Phosphor-in-glass

KW - Photo-luminescence

KW - PiG microcubes

KW - Scatter-free phosphor

UR - http://www.scopus.com/inward/record.url?scp=84922842358&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2014.12.048

DO - 10.1016/j.ceramint.2014.12.048

M3 - Article

AN - SCOPUS:84922842358

VL - 41

SP - 5200

EP - 5204

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 3

ER -