Time-Responsive Visualization of Cryogenic Detection Based on the Dynamic Optical Signals of CaZnOS

Cryogenic detection technology is essential to ensure safety and effectiveness in fields such as medical refrigeration, cold chain transport, and cryogenic bioengineering. In this paper, a time-responsive visual cryogenic detection strategy is developed based on the storage properties of CaZnOS: Pb²⁺, Pr³⁺ phosphors with shallow traps. Since the carrier release rate from the trap center receives the influence of ambient temperature and storage time, the storage time of the temperature-sensitive product can be determined by the different optical signals of CaZnOS: Pb²⁺, Pr³⁺ phosphors obtained under 980 nm laser irradiation. In addition, CaZnOS: Pb²⁺, Pr³⁺ phosphors with multimode luminescence enable time-responsive visual detection of ambient temperature under extreme conditions. This work not only demonstrates the potential of CaZnOS: Pb²⁺, Pr³⁺ phosphors for visual detection of temperature and time but also paves the way for the development of various applications relying on cryogenic monitoring.