Abstract
Mechanoluminescence materials that emit light under mechanical stimulation have attracted widespread attention in sensing, anticounterfeiting, and imaging applications. In this study, a series of Sr1-xBixZnSO (0.001 ≤ x ≤ 0.1) samples was synthesized by the method of high temperature solid-state reaction. It is worth noting that the distortion degree of the SrO3S3 octahedron was increased with increasing Bi3+ concentration, and the color manipulated Sr1-xBixZnSO which can emit different photoluminescence (blue to dark blue and finally red) and mechanoluminescence (orange to red) colors is obtained. Moreover, the deep traps can stably store and provide electronic supplements in shallow traps released under mechanical stimulation. Therefore, devices made of SrZnSO:Bi3+ phosphor and polydimethylsiloxane (PDMS) can be used as thermo-mechano-opto three-mode anticounterfeiting. The ML intensity is linear to the external load and can be utilized for stress sensing or imaging.
Highlights
Functional materials that exhibit excellent luminescence properties and chemical stability show a wide range of applications in sensing, detection, memory, display, lighting, optical storage and other fields [1, 2]
The comparison between Sr1-xBixZnSO patterns and calculated diffraction patterns appears that SrZnSO is the main phase of these samples with a trace of SrS as an impurity phase
These results indicate Bi3+ were successfully incorporated into the samples while maintaining the crystal structures intact
Summary
Functional materials that exhibit excellent luminescence properties and chemical stability show a wide range of applications in sensing, detection, memory, display, lighting, optical storage and other fields [1, 2]. ML materials can convert the mechanical energy into light emission with the application of various external mechanical stimuli such as compression, impact, stress and friction, even ultrasound [4, 5]. It is worth noting that ML materials show numerous advantages, such as recoverability, wireless detection, intense luminescence, nondestructive analysis, high mechano-optical conversion efficiency, and more importantly, the accurate linear relationship between ML emission intensity and external load in the elastic deformation range providing real-time detection signals of stress in a reliable way [6,7,8]. There are still some problems in the existing ML materials, such as weak ML intensity, limited ML color and structural damage during stress application [19]. To develop new ML materials with strong ML intensity and tunable emission colors is pressing
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