Phase‐Manipulated Calcium Borate‐Based Multicolor Mechanoluminescence

in these phases gives rise to tunable ML emission spanning from green to orange (535-605 nm). When incorporated into polydimethylsiloxane (PDMS) elastomers, these materials exhibit remarkable multicolor ML suitable for multi-level optical encryption and motion visualization. The encrypted information remains hidden under daylight or UV illumination can be deciphered only through ML activation, while the stress-induced color variation enables real-time monitoring of joint movement. This work not only establishes a versatile route for the design of low-temperature, phase-tunable ML materials but also reveals promising applications in next-generation information security and intelligent motion-sensing technologies.