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Photoluminescence Properties of Er/Pr‐Doped K 0.5 Na 0.5 NbO 3 Ferroelectric Ceramics
Author(s) -
Wu Xiao,
Lau Chi Man,
Kwok Kin Wing
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13605
Subject(s) - photoluminescence , photon upconversion , natural bond orbital , materials science , doping , ferroelectricity , ion , ferroelectric ceramics , analytical chemistry (journal) , infrared , excitation , optoelectronics , ceramic , photoluminescence excitation , polarization (electrochemistry) , mineralogy , optics , chemistry , physics , dielectric , molecule , organic chemistry , chromatography , quantum mechanics , composite material
Er/Pr‐doped K 0.5 Na 0.5 NbO 3 ceramics have been fabricated and the effects of Pr 3+ on their photoluminescence properties have been investigated systematically. The visible upconversion emissions, near‐infrared and mid‐infrared downconversion emissions of Er 3+ ions under the excitation of 980 nm have been studied in detail. The effects of Pr 3+ on PL properties and energy‐transfer processes have also been elucidated. By selecting an appropriate excitation source, simultaneous visible downconversion emissions of Er 3+ and Pr 3+ ions can be realized, and the emission colors of the ceramics can be tuned via the concentration of Pr 3+ ions in a wide range from yellowish green to yellow. Our results also reveal that the photoluminescence emissions of the ceramics can be enhanced by the alignment of polarization of the ferroelectric host.