基质对Tb3+单掺荧光玻璃发光性质的影响

Abstract

Tb3 +doped borate,silicate and phosphate glasses and glass matrixes were prepared by high temperature melting technology. According to the UV-Vis transmission spectra,the experiment oscillator strengths of Tb3 +from7F6to5D3and5D4were calculated,and the luminescent properties of Tb3 +in different glass matrixes were explained. The results show that the 542 nm and 585 nm emissions of Tb3 +doped in phosphate glass have split into two peaks because of the poor symmetry. In borate and silicate glasses,the particles in5D3energy level of Tb3 +have been emptied and moved to5D3energy level because of the cross relaxation,so the emissions from5D3energy level(413,436 nm) are not obvious. In phosphate glass,5D3energy level of Tb3 +has much fewer particles and no cross relaxation,so the emission from5D3energy level is the strongest. The characteristic emission peaks of Tb3 +from5D4energy level are 489,542,585 and 620 nm. In different glass matrixes,the order of their intensities from largest to smallest is borate,silicate and phosphate glass,which is consistent with the order of experiment oscillator strengths from7F6to5D4.