Novel non-real-time stress recording strategy based on mechanochemically synthesized lead-free perovskite of Cs2TeCl6

The conventional non-real-time stress recording relies on the acquisition of feedback signals from the deformations/fracture/friction of the pressure-responsive media under mechanical stimuli, and thus the history of mechanical processes cannot be recorded without signal receiving terminals especially when mechanical actions occur at an unpredictable moment. In this work, a new strategy of non-real-time stress recording based on mechanochemical synthesis of lead-free perovskite Cs2TeCl6 is proposed for the first time. Significantly different from the conventional strategy, here applied stress is utilized for the mechanochemical synthesis of Cs2TeCl6 with photoluminescence (PL) properties, while stress recording is achieved by collecting PL signals from stress-assisted prepared Cs2TeCl6. The sandwich-structured stress-recording tape is prepared based on the separating distributed precursor salts in opposing layers, and Cs2TeCl6 will be rapidly in-situ synthesized in the stressed region once the tape is stressed. The stress-recording tape provides irreversible recording as well as long storage time for the application history of mechanical stimuli. Finally, the practical applications of stress-recording tape are demonstrated, providing feasible ideas for its application and showing commercial prospects in collision recording, second-hand item identification and security monitoring.