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Tunable white light emission from single‐phased Li 2 SrSiO 4 :Dy 3+ phosphors by co‐doping with Eu 3+
Author(s) -
Zhang ZhiWei,
Shen XiHai,
Peng YouShun,
Ren YanJun,
Mao ZhiYong
Publication year - 2015
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.2692
Subject(s) - phosphor , chromaticity , photoluminescence , analytical chemistry (journal) , doping , luminescence , materials science , photoluminescence excitation , light emitting diode , chemistry , optoelectronics , optics , physics , chromatography
A series of single‐phase full‐color emitting Li 2 Sr 1− x−y SiO 4 : x Dy 3+ , y Eu 3+ phosphors were synthesized by solid‐state reaction and characterized by X‐ray diffraction and photoluminescence analyses. The samples showed emission peaks at 488 nm (blue), 572 nm (yellow), 592 nm (orange) and 617 nm (red) under 393 nm excitation. The photoluminescence excitation spectra, comprising the Eu–O charge transfer band and 4f–4f transition bands of Dy 3+ and Eu 3+ , range from 200 to 500 nm. The Commission Internationale de I'Eclairage chromaticity coordinates for Li 2 Sr 0.98− x SiO 4 :0.02Dy 3+ , x Eu 3+ phosphors were simulated. By manipulating Eu 3+ and Dy 3+ concentrations, the color points of Li 2 Sr 1− x−y SiO 4 : x Dy 3+ , y Eu 3+ were tuned from the greenish‐white region to white light and eventually to reddish‐white region, demonstrating that a tunable white light can be obtained by Li 2 Sr 1− x−y SiO 4 : x Dy 3+ , y Eu 3+ phosphors. Li 2 Sr 0.98− x SiO 4 :0.02Dy 3+ , x Eu 3+ can serve as a white‐light‐emitting phosphor for phosphor‐converted light‐emitting diode. Copyright © 2014 John Wiley & Sons, Ltd.