科研之友
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摘要
A novel Ba2MgMoO6:Eu3 orange-red phosphor was synthesized by the Pechini method and characterized by x-ray diffraction. Photoluminescence properties of BaMgMoO6:Eu3 phosphors have been represented in the excitation and emission spectra. The charge transfer (CT) band of Ba2MgMoO6 host is situated at near-ultraviolet (UV) region, whose central wave length and bandwidth are 394 and 80 nm, respectively. And it matches well the emission wave length from near-UV light emitting diodes (LEDs). The most intensive emission of D-5(0) F-7(1) (598 nm) of Eu3 in Ba2MgMoO6:Eu3 is much narrow with a full width at half-maximum less than 2 nm under excitation with either CT band or 394 nm. And a low concentration quenching occurs in Ba2MgMoO6:Eu3 , and the optimal doping concentration is about 0.05. The mechanism of charge and energy transfer from Ba2MgMoO6 host to Eu3 is proposed and analyzed on the basis of its crystal structure. In a word, Ba2MgMoO6:Eu3 may be a promising orange-red component for near UV white LEDs.
- 出版日期2013-11-28
- 单位广东工业大学
