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Photoluminescence properties of a new orange–red‐emitting Sm 3+ –La 3 SbO 7 phosphor
Author(s) -
Li ZengMei,
Deng LiGang,
Zhao ShanCang,
Zhang ShuQiu,
Guo ChangYing,
Liang JingYun,
Yue Hui,
Wan ChunYan
Publication year - 2016
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2983
Subject(s) - phosphor , chromaticity , photoluminescence , antimonate , analytical chemistry (journal) , orange (colour) , thermal stability , chemistry , luminescence , materials science , mineralogy , optics , optoelectronics , physics , inorganic chemistry , antimony , food science , organic chemistry , chromatography
Abstract The antimonate compound La 3 SbO 7 has high chemical stability, lattice stiffness and thermal stability. Orange–red‐emitting antimonate‐based phosphors La 3 SbO 7 : x Sm 3+ ( x = 0.02, 0.05, 0.08, 0.10, 0.15, 0.20 and 0.25) were synthesized. The phase structure and photoluminescence properties of these phosphors were investigated. The emission spectrum obtained on excitation at 407 nm contained exclusively the characteristic emissions of Sm 3+ at 568, 608, 654 and 716 nm, which correspond to the transitions from 4 G 5/2 to 6 H 5/2 , 6 H 7/2 , 6 H 9/2 and 6 H 11/2 of Sm 3+ , respectively. The strongest emission was located at 608 nm due to the 4 G 5/2 → 6 H 7/2 transition of Sm 3+ , generating bright orange–red light. The critical quenching concentration of Sm 3+ in La 3 SbO 7 :Sm 3+ phosphor was determined as 10% and the energy transfer between Sm 3+ was found to be through an exchange interaction. The International Commission on Illumination chromaticity coordinates of the La 3 SbO 7 :0.10Sm 3+ phosphors are located in the orange–red region. The La 3 SbO 7 :Sm 3+ phosphors may be potentially used as red phosphors for white light‐emitting diodes. Copyright © 2015 John Wiley & Sons, Ltd.