Native Point Defect Modulated Cr3+-Laalo3 As An In Vitro Excited Contrast Medium For In Vivo Near-Infrared Persistent Deep-Tissue Bio-Imaging

Due to the synergistic effect of Cr3+ dopant levels and defect state, the luminescence intensity and decay time in LaAlO3 are remarkably enhanced, and the emission wavelength from deep-red (Cr3+ as the luminescent center) to NIR-II/III (defect states as the luminescent center) can be effectively tuned via an energy transfer process.