Bredigite-structure orthosilicate phosphor as a green component for white LED: The structural and optical properties

Kyoung Hwa Lee, Seung Hyok Park, Ho Shin Yoon, Yong Il Kim, Ho Gyeom Jang, Won Bin Im

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

A green-emitting phosphor, Ca14-xEuxMg2[SiO 4]8 (CMS:Eu2+), has been synthesized as a component of white light emitting diodes (WLEDs). The emission spectrum is broad, with a maximum at about 505 nm under 400 nm excitation due to the transition from the 4 f65d excited state to the 4 f7-ground state of a Eu 2+ ion. The dipole-dipole interaction was a dominant energy transfer mechanism of the electric multipolar character of CMS:Eu2+. The critical distance was calculated as 12.9 Å and 14.9 Å using a critical concentration of Eu2+ and Dexter's theory for energy transfer. When CMS:Eu2+ and red phosphor are incorporated with an encapsulant on an ultraviolet (λmax = 395 nm) light emitting diodes (LEDs), white light with a color rendering index of 91 under a forward bias current of 20mA was obtained. The structural and optical characterization of the phosphor is described.

Original languageEnglish
Pages (from-to)6248-6257
Number of pages10
JournalOptics Express
Volume20
Issue number6
DOIs
Publication statusPublished - 2012 Mar 12

Fingerprint

phosphors
light emitting diodes
optical properties
energy transfer
dipoles
excitation
emission spectra
color
ground state
ions
interactions

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Bredigite-structure orthosilicate phosphor as a green component for white LED : The structural and optical properties. / Lee, Kyoung Hwa; Park, Seung Hyok; Yoon, Ho Shin; Kim, Yong Il; Jang, Ho Gyeom; Im, Won Bin.

In: Optics Express, Vol. 20, No. 6, 12.03.2012, p. 6248-6257.

Research output: Contribution to journalArticle

Lee, Kyoung Hwa ; Park, Seung Hyok ; Yoon, Ho Shin ; Kim, Yong Il ; Jang, Ho Gyeom ; Im, Won Bin. / Bredigite-structure orthosilicate phosphor as a green component for white LED : The structural and optical properties. In: Optics Express. 2012 ; Vol. 20, No. 6. pp. 6248-6257.
@article{e8e3a88e302a414485d48ac2a6582d03,
title = "Bredigite-structure orthosilicate phosphor as a green component for white LED: The structural and optical properties",
abstract = "A green-emitting phosphor, Ca14-xEuxMg2[SiO 4]8 (CMS:Eu2+), has been synthesized as a component of white light emitting diodes (WLEDs). The emission spectrum is broad, with a maximum at about 505 nm under 400 nm excitation due to the transition from the 4 f65d excited state to the 4 f7-ground state of a Eu 2+ ion. The dipole-dipole interaction was a dominant energy transfer mechanism of the electric multipolar character of CMS:Eu2+. The critical distance was calculated as 12.9 {\AA} and 14.9 {\AA} using a critical concentration of Eu2+ and Dexter's theory for energy transfer. When CMS:Eu2+ and red phosphor are incorporated with an encapsulant on an ultraviolet (λmax = 395 nm) light emitting diodes (LEDs), white light with a color rendering index of 91 under a forward bias current of 20mA was obtained. The structural and optical characterization of the phosphor is described.",
author = "Lee, {Kyoung Hwa} and Park, {Seung Hyok} and Yoon, {Ho Shin} and Kim, {Yong Il} and Jang, {Ho Gyeom} and Im, {Won Bin}",
year = "2012",
month = "3",
day = "12",
doi = "10.1364/OE.20.006248",
language = "English",
volume = "20",
pages = "6248--6257",
journal = "Optics Express",
issn = "1094-4087",
publisher = "The Optical Society",
number = "6",

}

TY - JOUR

T1 - Bredigite-structure orthosilicate phosphor as a green component for white LED

T2 - The structural and optical properties

AU - Lee, Kyoung Hwa

AU - Park, Seung Hyok

AU - Yoon, Ho Shin

AU - Kim, Yong Il

AU - Jang, Ho Gyeom

AU - Im, Won Bin

PY - 2012/3/12

Y1 - 2012/3/12

N2 - A green-emitting phosphor, Ca14-xEuxMg2[SiO 4]8 (CMS:Eu2+), has been synthesized as a component of white light emitting diodes (WLEDs). The emission spectrum is broad, with a maximum at about 505 nm under 400 nm excitation due to the transition from the 4 f65d excited state to the 4 f7-ground state of a Eu 2+ ion. The dipole-dipole interaction was a dominant energy transfer mechanism of the electric multipolar character of CMS:Eu2+. The critical distance was calculated as 12.9 Å and 14.9 Å using a critical concentration of Eu2+ and Dexter's theory for energy transfer. When CMS:Eu2+ and red phosphor are incorporated with an encapsulant on an ultraviolet (λmax = 395 nm) light emitting diodes (LEDs), white light with a color rendering index of 91 under a forward bias current of 20mA was obtained. The structural and optical characterization of the phosphor is described.

AB - A green-emitting phosphor, Ca14-xEuxMg2[SiO 4]8 (CMS:Eu2+), has been synthesized as a component of white light emitting diodes (WLEDs). The emission spectrum is broad, with a maximum at about 505 nm under 400 nm excitation due to the transition from the 4 f65d excited state to the 4 f7-ground state of a Eu 2+ ion. The dipole-dipole interaction was a dominant energy transfer mechanism of the electric multipolar character of CMS:Eu2+. The critical distance was calculated as 12.9 Å and 14.9 Å using a critical concentration of Eu2+ and Dexter's theory for energy transfer. When CMS:Eu2+ and red phosphor are incorporated with an encapsulant on an ultraviolet (λmax = 395 nm) light emitting diodes (LEDs), white light with a color rendering index of 91 under a forward bias current of 20mA was obtained. The structural and optical characterization of the phosphor is described.

UR - http://www.scopus.com/inward/record.url?scp=84858980701&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84858980701&partnerID=8YFLogxK

U2 - 10.1364/OE.20.006248

DO - 10.1364/OE.20.006248

M3 - Article

C2 - 22418508

AN - SCOPUS:84858980701

VL - 20

SP - 6248

EP - 6257

JO - Optics Express

JF - Optics Express

SN - 1094-4087

IS - 6

ER -