Uncovering self-recoverable NIR mechanoluminescence from Cr³⁺ doped perovskite type aluminate

Mechanoluminescence (ML) located within the near infrared (NIR) spectral range may hold promising applications in in-situ and real-time biomechanical imaging. This is due to the better spatial resolution and penetration depth of the biological tissues, lower optical loss, and the avoidance of autofluorescence.