Potential red-emitting NaGd(MO4)(2):R (M = W, Mo, R = Eu3+, Sm3+, Bi3+) phosphors for white light emitting diodes applications

作者：Mo, Fuwang; Zhou, Liya^*; Pang, Qi; Gong, Fuzhong; Liang, Zhijuan

来源：Ceramics International, 2012, 38(8): 6289-6294.

DOI：10.1016/j.ceramint.2012.04.084

• Luminescence
• Phosphor
• Solid-state reaction

NaGd(MO4)(2):R (M = W, Mo, R = Eu3+, Sm3+, Bi3+) phosphors were synthesized by solid-state reaction. The structure and photoluminescence properties of the samples were characterized using X-ray powder diffraction and fluorescence spectrophotometry. The D-5(0) -> F-7(2) transition of Eu3+, which led to a red emission of the phosphors, was dominantly observed in the photoluminescence spectra. The doped Bi3+ and Sm3+ efficiently sensitized the emission of Eu3+ and effectively extended and strengthened the absorption of near-UV light with wavelengths ranging from 395 to 405 nm. In addition, energy transfers from Bi3+ to Eu3+ and from Sm3+ to Eu3+ occurred. The chromaticity coordinates of the obtained phosphors were close to the standard values of the National Television Standard Committee (x=0.670, y=0.330). The results suggest that NaGd(WO4)(2-y)(MoO4)(y):Eu3+, Sm3+, Bi3+ is an efficient redemitting phosphor for light-emitting diode applications.

• 出版日期2012-12
• 单位玉林师范学院; 广西大学