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Energy transfer rate and electron–phonon coupling properties in Eu 3+ ‐doped nanophosphors
Author(s) -
Ren Y. D.,
Liu Y. H.,
Tan S. M.,
Cui H. Y.,
Wang Y. L.,
Li X. M.,
Yang R.,
Wei X.,
Zhang H. W.,
Sun Y. D.
Publication year - 2017
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.3198
Subject(s) - chromaticity , phosphor , doping , sideband , color temperature , analytical chemistry (journal) , materials science , luminescence , optoelectronics , optics , chemistry , physics , chromatography , quantum mechanics , microwave
A series of controllable emissions SrWO 4 :Eu 3 + and charge‐compensated SrWO 4 : Eu m 3 +(m = 0.01 or 0.20) phosphors was successfully prepared via a simple co‐precipitation method. The energy transfer mechanism was studied based on the Huang's theory. A low magnitude of Huang‐Rhys factor (10 −2 ) was calculated using phonon sideband spectra. The Judd–Ofelt parameters Ω λ (λ = 2, 4 and 6) of Eu 3 + ‐activated SrWO 4 doped with charge compensation were obtained. The calculated Commission Internationale de l'Eclairage chromaticity coordinates were found to be about (0.67, 0.33) for SrWO 4 : Eu 0.20 3 +and charge‐compensated SrWO 4 : Eu 0.20 3 +phosphors, which coincided with the National Television Standard Committee system standard values for red. A white light emission was obtained under 362 nm excitation. The correlated color temperature was computed by a simple equation to characterize light sources. Thus, warm white light‐emitting diodes with higher Ra can be constructed by combining as‐prepared high efficiency, low correlated color temperature and high color purity phosphor.