硼酸掺量对SrAl2O4长余辉发光材料的发光性能影响

用燃烧法制备了Eu2 ,Dy3 共掺杂SrAl2O4长余辉发光材料,研究了不同硼酸掺量对Eu2 ,Dy3 共掺杂SrAl2O4长余辉发光材料发光性能的影响。为了分析B2O3在材料制备中的作用,用XRD对所合成材料进行物相分析,用荧光光谱仪记录其发射光谱,并在暗室里拍摄紫外激发下的发光照片。结果表明:硼酸掺量为0.8的样品的发光光谱,其发射峰峰值位于518 nm,是典型的Eu2 的4f5d→4f的特征发射,为一宽谱带发光光谱。硼酸掺量为2的样品的发光光谱,其在518 nm位置的峰十分弱,而在487 nm处同时出现了一个弱峰,整个谱线呈一斜坡状。随着硼酸加入量的不同,Eu2 ,Dy3 共掺杂铝酸锶的发光效果、形貌特征均不同。在某一范围内,随着硼酸添加量的增加,合成了发光主晶相,烧结温度有所降低,材料的发光性能和发光亮度均有所提高。

The Influence of Boric Acid Content on Luminescent Properties of SrAl2O4

Long persistence phosphor powder of E2+, Dy3+ co-doped SrAl2O4 were prepared by combustion method. The influence of boric acid with different contents on the luminescent properties of Eu2+, Dy3+ co-doped alkaline earth aluminates were studied. To analyze the role of B2O3, phase identification was carried out by X-ray powder diffraction, emission spectra were recorded using a luminescence spectrometer, and luminescence photos were taken in a dark room after being excited by UV. The results indicated that the lambda(em) of the sample with content of 0.8 is 518 nm, which is the typical emission of Eu2+ 4f5d --> 4f and is a wide emission spectrum. There are two peaks in the emission spectra of the sample with content of 2, one is at 518 nm, and the other is at 487 nm, both of which are weak. The whole spectral line is a declining line. With the increase in boric acid content, the luminescence property and appearance character of Eu2+, Dy3+ co-doped strontium aluminates long persistence phosphor were different. In some range, with the increase in boric acid content, luminescence property and luminescence intensity were increased, and the sintering temperature was lowd.