Study on Na3Lu1-xEux(PO4)2 phosphor: High efficient Na3Eu(PO4)2 red emitting phosphor with excellent thermal stability

D. Kim; Bo Ram Lee; Sung Heum Park; Jung Hwan Kim; Jung Hyun Jeong

doi:10.1016/j.jallcom.2019.06.190

Study on Na₃Lu_1-xEu_x(PO₄)₂ phosphor: High efficient Na₃Eu(PO₄)₂ red emitting phosphor with excellent thermal stability

D. Kim, Bo Ram Lee, Sung Heum Park, Jung Hwan Kim, Jung Hyun Jeong

Pukyong National University

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

25 Scopus citations

Abstract

High efficient Na₃(Lu_1-xEu_x)(PO₄)₂ orthophosphates phosphors were synthesized by conventional solid state reaction method. The obtained phosphors crystallized in the orthorhombic system with the space group Pca2₁. Since the crystal structure of the phosphor is composed of isolated PO₄ tetrahedra, the average distance between rare earth ions was distant. As the concentration of Eu³⁺ activator ion reaches to 100%, reduced Judd-Ofelt parameter ratio of Ω₂/Ω₄ implies the improvement of the symmetry environment around Eu³⁺ ion and from the prolonged lifetime of ⁵D₀→⁷F₂ transition we inferred no-concentration quenching in this phosphor. Furthermore, due to the better crystallinity of Na₃Eu(PO₄)₂ phosphor compared to the mixed crystals Na₃(Lu_1-xEu_x)(PO₄)₂, the internal quantum efficiency of the Na₃Eu(PO₄)₂ phosphor reaches the high value up to 99% under near-ultraviolet (393 nm) excitation. Temperature dependent emission spectra revealed that Na₃Eu(PO₄)₂ phosphor possesses stable emission of 80% at 423 K compared to room temperature. Due to high quantum efficiency and excellent thermal stability, Na₃Eu(PO₄)₂ has potential application as reddish-orange phosphors.

Original language	English
Pages (from-to)	346-354
Number of pages	9
Journal	Journal of Alloys and Compounds
Volume	805
DOIs	https://doi.org/10.1016/j.jallcom.2019.06.190
State	Published - 15 Oct 2019
Externally published	Yes

Keywords

Concentration quenching
Judd-ofelt
Luminescence
Quantum efficiency

Access to Document

10.1016/j.jallcom.2019.06.190

Cite this

@article{4fab8975e2bb41b58fa3fa22858fd655,

title = "Study on Na3Lu1-xEux(PO4)2 phosphor: High efficient Na3Eu(PO4)2 red emitting phosphor with excellent thermal stability",

abstract = "High efficient Na3(Lu1-xEux)(PO4)2 orthophosphates phosphors were synthesized by conventional solid state reaction method. The obtained phosphors crystallized in the orthorhombic system with the space group Pca21. Since the crystal structure of the phosphor is composed of isolated PO4 tetrahedra, the average distance between rare earth ions was distant. As the concentration of Eu3+ activator ion reaches to 100\%, reduced Judd-Ofelt parameter ratio of Ω2/Ω4 implies the improvement of the symmetry environment around Eu3+ ion and from the prolonged lifetime of 5D0→7F2 transition we inferred no-concentration quenching in this phosphor. Furthermore, due to the better crystallinity of Na3Eu(PO4)2 phosphor compared to the mixed crystals Na3(Lu1-xEux)(PO4)2, the internal quantum efficiency of the Na3Eu(PO4)2 phosphor reaches the high value up to 99\% under near-ultraviolet (393 nm) excitation. Temperature dependent emission spectra revealed that Na3Eu(PO4)2 phosphor possesses stable emission of 80\% at 423 K compared to room temperature. Due to high quantum efficiency and excellent thermal stability, Na3Eu(PO4)2 has potential application as reddish-orange phosphors.",

keywords = "Concentration quenching, Judd-ofelt, Luminescence, Quantum efficiency",

author = "D. Kim and Lee, \{Bo Ram\} and Park, \{Sung Heum\} and Kim, \{Jung Hwan\} and Jeong, \{Jung Hyun\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = oct,

day = "15",

doi = "10.1016/j.jallcom.2019.06.190",

language = "English",

volume = "805",

pages = "346--354",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Study on Na3Lu1-xEux(PO4)2 phosphor

T2 - High efficient Na3Eu(PO4)2 red emitting phosphor with excellent thermal stability

AU - Kim, D.

AU - Lee, Bo Ram

AU - Park, Sung Heum

AU - Kim, Jung Hwan

AU - Jeong, Jung Hyun

PY - 2019/10/15

Y1 - 2019/10/15

N2 - High efficient Na3(Lu1-xEux)(PO4)2 orthophosphates phosphors were synthesized by conventional solid state reaction method. The obtained phosphors crystallized in the orthorhombic system with the space group Pca21. Since the crystal structure of the phosphor is composed of isolated PO4 tetrahedra, the average distance between rare earth ions was distant. As the concentration of Eu3+ activator ion reaches to 100%, reduced Judd-Ofelt parameter ratio of Ω2/Ω4 implies the improvement of the symmetry environment around Eu3+ ion and from the prolonged lifetime of 5D0→7F2 transition we inferred no-concentration quenching in this phosphor. Furthermore, due to the better crystallinity of Na3Eu(PO4)2 phosphor compared to the mixed crystals Na3(Lu1-xEux)(PO4)2, the internal quantum efficiency of the Na3Eu(PO4)2 phosphor reaches the high value up to 99% under near-ultraviolet (393 nm) excitation. Temperature dependent emission spectra revealed that Na3Eu(PO4)2 phosphor possesses stable emission of 80% at 423 K compared to room temperature. Due to high quantum efficiency and excellent thermal stability, Na3Eu(PO4)2 has potential application as reddish-orange phosphors.

AB - High efficient Na3(Lu1-xEux)(PO4)2 orthophosphates phosphors were synthesized by conventional solid state reaction method. The obtained phosphors crystallized in the orthorhombic system with the space group Pca21. Since the crystal structure of the phosphor is composed of isolated PO4 tetrahedra, the average distance between rare earth ions was distant. As the concentration of Eu3+ activator ion reaches to 100%, reduced Judd-Ofelt parameter ratio of Ω2/Ω4 implies the improvement of the symmetry environment around Eu3+ ion and from the prolonged lifetime of 5D0→7F2 transition we inferred no-concentration quenching in this phosphor. Furthermore, due to the better crystallinity of Na3Eu(PO4)2 phosphor compared to the mixed crystals Na3(Lu1-xEux)(PO4)2, the internal quantum efficiency of the Na3Eu(PO4)2 phosphor reaches the high value up to 99% under near-ultraviolet (393 nm) excitation. Temperature dependent emission spectra revealed that Na3Eu(PO4)2 phosphor possesses stable emission of 80% at 423 K compared to room temperature. Due to high quantum efficiency and excellent thermal stability, Na3Eu(PO4)2 has potential application as reddish-orange phosphors.

KW - Concentration quenching

KW - Judd-ofelt

KW - Luminescence

KW - Quantum efficiency

UR - https://www.scopus.com/pages/publications/85068775490

U2 - 10.1016/j.jallcom.2019.06.190

DO - 10.1016/j.jallcom.2019.06.190

M3 - Article

AN - SCOPUS:85068775490

SN - 0925-8388

VL - 805

SP - 346

EP - 354

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Study on Na₃Lu_1-xEu_x(PO₄)₂ phosphor: High efficient Na₃Eu(PO₄)₂ red emitting phosphor with excellent thermal stability

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this