A novel pure red phosphor Ca8MgLu(PO4)7:Eu3+ for near ultraviolet white light-emitting diodes

Feiyan Xie, Zhiyue Dong, Dawei Wen, Jing Yan, Jianxin Shi, Jianying Shi, Mingmei Wu

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

Abstract A novel red-emitting phosphor Ca8MgLu(PO4)7:Eu3+ was synthesized by a high-temperature solid-state reaction method. Its crystal structure, photoluminescence emission and excitation spectra, and decay time were investigated in detail. X-ray diffraction (XRD) results indicate that Ca8MgLu(PO4)7 crystallizes in single-phase component with a whitlockite-like structure and the space group R3c of β-Ca3(PO4)2. The emission spectrum shows a dominant peak at 612 nm due to the dipole 5D07F2 transition of Eu3+, and the luminescence intensity keeps increasing with increasing the content of Eu3+ to 100%. The excitation spectrum is coupled well with the emission of near ultraviolet (NUV) LED (380-410 nm). The CIE coordinates of Ca8MgLu(PO4)7:Eu3+ phosphor is (0.654, 0.346), being close to the standard value of National Television Standard Committee (NTSC) for red phosphor, (0.670, 0.330). The internal quantum efficiency of the phosphor is 69% under the excitation of 394 nm. The results show that Ca8MgLu(PO4)7:Eu3+ is a very appropriate red-emitting phosphor with a high ratio of red and orange for NUV-based white LEDs.

Original languageEnglish
Article number10430
Pages (from-to)9610-9614
Number of pages5
JournalCeramics International
Volume41
Issue number8
DOIs
Publication statusPublished - 2015 Sep 1

Keywords

  • CaMgLu(PO):Eu
  • Luminescence
  • Phosphors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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