Emitting-tunable Eu(2+/3+)-doped Ca(8−x)La(2+x) (PO4)6−x(SiO4)xO2 apatite phosphor for n-UV WLEDs with high-color-rendering

Yi Wei, Hui Jia, Hui Xiao, Meng Meng Shang, Chun Che Lin*, Chaochin Su, Ting Shan Chan, Guo Gang Li, Jun Lin

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

26 Scopus citations

Abstract

Currently, developing single-phased white light phosphors based on a single-doped activator is an efficient approach to blends of bicolor/tricolor phosphors for realizing phosphor-converted white light emitting diodes (pc-WLEDs) with a high color rendering index (CRI) and low correlated color temperature (CCT). Here, we present high CRI (Ra = 93-95) and low CCT (3500-6000 K) white lights by cosubstituting [Ca2+-P5+] for [La3+-Si4+] in the solid solution Ca(8→2)La(2→8)(PO4)6−x(SiO4)xO2:Eu2+/Eu3+ (CLPSO_Eu). The results are attributed to the presence of multi Ca2+ sites due to possible mixing nanophases and the simultaneous occupancy of Ca2+ and La3+ sites by Eu, resulting in the mixing of blue (466 nm) and green emissions (540 nm) for Eu2+, and red emission (613 nm) for Eu3+, which were perfectly confirmed using X-ray Rietveld refinement, photoluminescence spectra and extended X-ray absorption fine structure.

Original languageEnglish
Pages (from-to)1899-1904
Number of pages6
JournalRSC Advances
Volume7
Issue number4
DOIs
StatePublished - 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry.

Fingerprint

Dive into the research topics of 'Emitting-tunable Eu(2+/3+)-doped Ca(8−x)La(2+x) (PO4)6−x(SiO4)xO2 apatite phosphor for n-UV WLEDs with high-color-rendering'. Together they form a unique fingerprint.

Cite this