Self?Recoverable Mechanically Induced Instant Luminescence from Cr ³⁺ ?Doped LiGa ₅ O ₈

Currently, most of the mechanoluminescence (ML) phosphors strongly depend on postirradiation stimulation using ultraviolet light (denoted as “UV exposure” from hereon) to show ML. However, only a few transition metal cations are proven be effective luminescence centers, which hinder development more ML phosphors. This study reports self-recoverable deep-red-to-near-infrared Cr3+-doped LiGa5O8 phosphor with fully recoverable performance. The performance can further optimized by tuning trap redistributions codoping Al3+ and Cr3+ cations. Theoretical calculations reveal important role Cr dopants in modulation local electronic environments for achieving Owing induced interelectronic levels shallow electron distributions, recombination efficiency is enhanced both through direct tunneling energy transfer toward dopant levels. Moreover, penetrate 2-mm-thick pork slice, showing that it have wide-ranging vivo applications, including optical imaging intracorporal stress/strain distribution dynamics. Therefore, this work fabricates novel material an extended wavelength range, increasing number potential candidates promoting fundamental understanding practical applications materials.