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Mechanoluminescence (ML) materials, which can emit light under external mechanical stimuli, have attracted wide attention in diverse applications such as display, anti-counterfeiting and 3D signature. However, weak ML intensity and limited ML regulation methods are still limiting the development of ML materials. In this study, a series of Li0.997YGeO4: 0.5% Bi3+, xTb3+ samples are synthesized by high temperature solid-state reaction method. Based on photoluminescence (PL), crystal structure, ML, persistent luminescence (PersL), diffuse reflectance spectra (DR) and thermoluminescence (TL) analysis, the inherent relationship between PL, PersL and ML is further clarified in detail. The existence of abundant trap sites created by the vacancy of Li+ ion and the Bi3+鈫扵b3+ energy transfer can improve the ML properties of the phosphors. This excellent material can open up a new approach for enhancing ML intensity and expand the application of ML materials in the anti-counterfeiting fields.
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