Efficient UV-emitting X-ray phosphors

Octahedral Zr(PO4) 6 luminescence centers in potassium hafnium-zirconium phosphates K2Hf1-xZrx(PO4)2 and KHf2(1-x)Zr2x(PO4)3

C. C. Torardi, C. R. Miao, Jing Li

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Potassium hafnium-zirconium phosphates, K2Hf 1-xZrx(PO4)2 and KHf 2(1-x)Zr2x(PO4)3, are broad-band UV-emitting phosphors. At room temperature, they have emission peak maxima at approximately 322 and 305nm, respectively, under 30kV peak molybdenum X-ray excitation. Both phosphors demonstrate luminescence efficiencies that make them up to ∼60% as bright as commercially available CaWO4 Hi-Plus. The solid-state and flux synthesis conditions, and X-ray excited UV luminescence of these two phosphors are discussed. Even though the two compounds have different atomic structures, they contain zirconium in the same active luminescence environment as that found in highly efficient UV-emitting BaHf1-xZrx(PO4)2. All the three materials have hafnium and zirconium in octahedral coordination via oxygen-atom corner sharing with six separate PO4 tetrahedra. This octahedral Zr(PO4)6 moiety appears to be an important structural element for efficient X-ray excited luminescence, as are the edge-sharing octahedral TaO6 chains for tantalate emission.

Original languageEnglish
Pages (from-to)289-293
Number of pages5
JournalJournal of Solid State Chemistry
Volume170
Issue number2
DOIs
Publication statusPublished - Feb 1 2003

Fingerprint

Hafnium
hafnium
Zirconium
Phosphors
phosphors
Potassium
Luminescence
potassium
phosphates
Phosphates
luminescence
X rays
x rays
Molybdenum
atomic structure
tetrahedrons
molybdenum
oxygen atoms
Oxygen
Fluxes

Keywords

  • Potassium hafnium-zirconium phosphate
  • Tantalum luminescence
  • UV emission
  • X-ray phosphor
  • Zirconium luminescence

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

@article{369b67098ec34db6bfe4e5cd06fd4748,
title = "Efficient UV-emitting X-ray phosphors: Octahedral Zr(PO4) 6 luminescence centers in potassium hafnium-zirconium phosphates K2Hf1-xZrx(PO4)2 and KHf2(1-x)Zr2x(PO4)3",
abstract = "Potassium hafnium-zirconium phosphates, K2Hf 1-xZrx(PO4)2 and KHf 2(1-x)Zr2x(PO4)3, are broad-band UV-emitting phosphors. At room temperature, they have emission peak maxima at approximately 322 and 305nm, respectively, under 30kV peak molybdenum X-ray excitation. Both phosphors demonstrate luminescence efficiencies that make them up to ∼60{\%} as bright as commercially available CaWO4 Hi-Plus. The solid-state and flux synthesis conditions, and X-ray excited UV luminescence of these two phosphors are discussed. Even though the two compounds have different atomic structures, they contain zirconium in the same active luminescence environment as that found in highly efficient UV-emitting BaHf1-xZrx(PO4)2. All the three materials have hafnium and zirconium in octahedral coordination via oxygen-atom corner sharing with six separate PO4 tetrahedra. This octahedral Zr(PO4)6 moiety appears to be an important structural element for efficient X-ray excited luminescence, as are the edge-sharing octahedral TaO6 chains for tantalate emission.",
keywords = "Potassium hafnium-zirconium phosphate, Tantalum luminescence, UV emission, X-ray phosphor, Zirconium luminescence",
author = "Torardi, {C. C.} and Miao, {C. R.} and Jing Li",
year = "2003",
month = "2",
day = "1",
doi = "10.1016/S0022-4596(02)00087-7",
language = "English",
volume = "170",
pages = "289--293",
journal = "Journal of Solid State Chemistry",
issn = "0022-4596",
publisher = "Academic Press Inc.",
number = "2",

}

TY - JOUR

T1 - Efficient UV-emitting X-ray phosphors

T2 - Octahedral Zr(PO4) 6 luminescence centers in potassium hafnium-zirconium phosphates K2Hf1-xZrx(PO4)2 and KHf2(1-x)Zr2x(PO4)3

AU - Torardi, C. C.

AU - Miao, C. R.

AU - Li, Jing

PY - 2003/2/1

Y1 - 2003/2/1

N2 - Potassium hafnium-zirconium phosphates, K2Hf 1-xZrx(PO4)2 and KHf 2(1-x)Zr2x(PO4)3, are broad-band UV-emitting phosphors. At room temperature, they have emission peak maxima at approximately 322 and 305nm, respectively, under 30kV peak molybdenum X-ray excitation. Both phosphors demonstrate luminescence efficiencies that make them up to ∼60% as bright as commercially available CaWO4 Hi-Plus. The solid-state and flux synthesis conditions, and X-ray excited UV luminescence of these two phosphors are discussed. Even though the two compounds have different atomic structures, they contain zirconium in the same active luminescence environment as that found in highly efficient UV-emitting BaHf1-xZrx(PO4)2. All the three materials have hafnium and zirconium in octahedral coordination via oxygen-atom corner sharing with six separate PO4 tetrahedra. This octahedral Zr(PO4)6 moiety appears to be an important structural element for efficient X-ray excited luminescence, as are the edge-sharing octahedral TaO6 chains for tantalate emission.

AB - Potassium hafnium-zirconium phosphates, K2Hf 1-xZrx(PO4)2 and KHf 2(1-x)Zr2x(PO4)3, are broad-band UV-emitting phosphors. At room temperature, they have emission peak maxima at approximately 322 and 305nm, respectively, under 30kV peak molybdenum X-ray excitation. Both phosphors demonstrate luminescence efficiencies that make them up to ∼60% as bright as commercially available CaWO4 Hi-Plus. The solid-state and flux synthesis conditions, and X-ray excited UV luminescence of these two phosphors are discussed. Even though the two compounds have different atomic structures, they contain zirconium in the same active luminescence environment as that found in highly efficient UV-emitting BaHf1-xZrx(PO4)2. All the three materials have hafnium and zirconium in octahedral coordination via oxygen-atom corner sharing with six separate PO4 tetrahedra. This octahedral Zr(PO4)6 moiety appears to be an important structural element for efficient X-ray excited luminescence, as are the edge-sharing octahedral TaO6 chains for tantalate emission.

KW - Potassium hafnium-zirconium phosphate

KW - Tantalum luminescence

KW - UV emission

KW - X-ray phosphor

KW - Zirconium luminescence

UR - http://www.scopus.com/inward/record.url?scp=1642282702&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1642282702&partnerID=8YFLogxK

U2 - 10.1016/S0022-4596(02)00087-7

DO - 10.1016/S0022-4596(02)00087-7

M3 - Article

VL - 170

SP - 289

EP - 293

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

SN - 0022-4596

IS - 2

ER -