Effect of doping on the luminescence properties of Li2B4O7

In this work, we have investigated the influence of doping agents on the luminescence properties of multiply doped Li₂B₄O₇ and the temperature lag between TSL materials and the heating element. The results of thermoluminescence studies show that the Ag doping leads to the appearance of a new glow curve peak at 165 °C and the increasing sensitivity of Li₂B₄O₇:Cu,Ag,P is correlated with copper and phosphate concentrations. Under the excitation at 245 nm the emission spectra show maxima at 365 and 450 nm in the ceramic, crystal and glass. The low energy shift in the latter system might be related to the local structural distortion in the glass around Cu⁺ ions.