Abstract
Abstract The intrinsic relationship between mechanics and luminescent signals in mechanoluminescence materials presents unique advantages for visualized mechanics sensing. However, the quantitative or semi-quantitative sensing of mechanics in previous mechanoluminescence-based devices are always established based on brightness/intensity variations, which are hard to apply in practice. In this work, we designed an efficient mechanoluminescent system, Sr2P2O7:Eu,Y, in which two types of luminescent centers are introduced with blue and red emissions, respectively. The luminescent centers exhibited a strikingly distinct stress/strain responsiveness, and therefore a stress/strain-induced color manipulation is realized. Based on this intriguing performance, a visualized semi-quantitative sensing technique for mechanics was developed, by which the detailed stress/strain level could be acquired from the mechanoluminescent color. Because the luminescent color possessed a relatively high reliability with no need for complicated monitoring equipment, this visualized semi-quantitative sensing for mechanics presents high application values in various fields.
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