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Synthesis and luminescence properties of Li 2 BaSiO 4 :Eu 3+ phosphors
Author(s) -
Xie Mubiao,
Luo Caiyan
Publication year - 2012
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201206316
Subject(s) - phosphor , chromaticity , luminescence , excited state , light emitting diode , materials science , analytical chemistry (journal) , ultraviolet , excitation , optoelectronics , chemistry , optics , atomic physics , physics , chromatography , quantum mechanics
Novel red phosphors Li 2– x Ba 1– x Eu x SiO 4 were synthesized using a high‐temperature solid‐state reaction, and their UV‐Vis luminescence properties as well as decay curves were investigated. The excitation spectra indicate that the Li 2– x Ba 1– x Eu x SiO 4 phosphors can be effectively excited by near‐ultraviolet (∼393 nm) light, dovetailed nicely with the UV light‐emitting diodes (LED) chip. The optimum luminance phosphor Li 1.88 Ba 0.88 Eu 0.12 SiO 4 shows red luminescence with a dominant 5 D 0 → 7 F 2 emission at about 615 nm and suitable chromaticity coordinates (0.639, 0.359), indicating that the phosphor may be a potential candidate for near‐UV InGaN‐based w‐LEDs. (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)