Open AccessSynthesis and Photoluminescence Properties of Ca2Ga2SiO7:Eu3+ Red Phosphors with an Intense 5D0 → 7F4 Transition
Author(s) -
Gaganpreet Kaur Behrh,
Romain Gautier,
Camille Latouche,
Stéphane Jobic,
Hélène SerierBrault
Publication year - 2016
Publication title -
inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 233
eISSN - 1520-510X
pISSN - 0020-1669
DOI - 10.1021/acs.inorgchem.6b00989
Subject(s) - phosphor , photoluminescence , chemistry , chromaticity , melilite , excited state , crystal structure , emission spectrum , light emitting diode , luminescence , absorption spectroscopy , analytical chemistry (journal) , crystallography , spectral line , optoelectronics , atomic physics , optics , physics , materials science , astronomy , metallurgy , spinel , chromatography
Novel melilite-type Ca2Ga2SiO7:Eu(3+) red-emitting phosphors with different Eu(3+) contents were synthesized via high-temperature solid-state reaction. The crystal structure, optical absorption, and photoluminescence properties were investigated, while density functional theory calculations were performed on the host lattice. The excitation spectra indicate that phosphors can be effectively excited by near-UV light for a potential application in white-light-emitting diodes. Because of the abnormally high intensity emission at about 700 nm arising from the (5)D0 → (7)F4 transition of Eu(3+), the phosphors Ca2Ga2SiO7:Eu(3+) show a deep-red emission with chromaticity coordinates (0.639, 0.358).
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