Multi-modal emissions from trinary active centers in piezoelectric semiconductor materials for intelligent sensing of stress and temperature

Abstract

Mechanoluminescence materials have important promise as smart phosphors, offering wide-ranging applications in sensing technologies. Nevertheless, the creation of photonic materials capable of responding to various external stimuli and demonstrating multiple functionalities in different contexts remains a major challenge. In this research, we synthesized the doped piezoelectric semiconductor CaZnOS, incorporating trinary luminescent centers. This material exhibited multi-modal responses to diverse stimuli, including ultraviolet and near-infrared light, mechanical stress, and temperature variations. Notably, it demonstrated rapid responsiveness to various forms of mechanical stress, with a response time on the millisecond scale and outstanding stability. By adjusting the doping ratio of emitting ions, we achieved modulation of luminescent colors. Furthermore, the integration of dual-mode emission facilitated highly sensitive temperature sensing, independent of external light sources. These findings indicate that our material holds great promise for applications in intelligent sensing of stress and temperature.

Keywords

• Mechanical luminescence
• Spectrum control
• Piezoelectric semiconductors
• Temperature sensing
• Stress sensing