Low Temperature Luminescence Properties of Tm~(3+) Doped Aluminate Phosphor

• 作 者: 夏天 庄卫东 崔向中 赵春雷 滕晓明 黄小卫
• 机 构: National Engineering Research Center for Rare Earth Materials General Research Institute for Nonferr
• 出 处: Journal of Rare Earths
• 发表日期: 2006年S1期
• 关键词: ultraviolet phosphor excitation Phosphor hexagonal luminescence luminous monitor

(Ba0.66Sr0.33)Mg0.8Al11.47O19:Tm0.013+(BSMA:Tm3+ ) phosphor was synthesized by solid-state reactions. The sample was characterized by X-ray diffraction (XRD), scanning electronic microscope (SEM), vacuum ultraviolet (VUV) spectra, ultraviolet (UV) spectra and FT-IR spectrum. XRD pattern reveals that BSMA: Tm3 + has the same structure as BaAl12O19 phase. SEM image illustrates that the phosphor has the hexagonal shape and deep slice structure. VUV and UV emission spectra at 20, 50 and 100 K show that the low temperature luminescence intensities become weak gradually with the increasing of the temperature under 147 and 254 nm excitation. The strong broadband peaks at around 357 and 397 nm and the peak at 516 nm under 147 nm excitation all correspond to the characteristic transitions of Tm3 + ions. However, under UV (254 nm) excitation, the main peak becomes 530 nm which has very high line intensity, and the peaks at about 362 and 403 nm are very weak. The excitation spectrum at 20 K shows that there are three absorption peaks at around 153, 186 and 193 nm when 516 nm emission is monitored. The absorption peaks of [AlO4], [AlO6] and Al-0 can be observed in FT-IR spectrum.

(Ba0.66Sr0.33) Mg0.8Al11.47O19: Tm0.013 + (BSMA: Tm3 +) phosphor was synthesized by solid-state reactions. The sample was characterized by X-ray diffraction (XRD) X-ray diffraction patterns of the BSMA: Tm3 + has the same structure as BaAl12O19 phase. SEM image shows that the phosphor has the hexagonal shape and deep slice structure. VUV and UV emission spectra at 20, 50 and 100 K show that the low temperature luminescence intensities became weak gradually with the increasing of the temperature under 147 and 254 nm excitation. The strong broadband peaks at around 357 and 397 nm and the peak at 516 However, under UV (254 nm) excitation, the main peak becomes 530 nm which has very high line intensity, and the peaks at about 362 and 403 nm are very weak. The excitation spectrum at 20 K shows that there are three absorption peaks at around 153, 186 and 193 nm when 516 nm emission is monitored. The absorption peaks of [AlO4], [AlO6] and Al-0 can be observed in the FT-IR spectrum.