We report 808 nm NIR light renewable NIR persistent luminescence sensitized photodynamic therapy (PDT). Persistent luminescence provides an internal light source to generate singlet oxygen for PDT. This work paves the way for the next generation of PDT without any need for continuous external light irradiation.

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The near-infrared (NIR) emitting wavelength-tunable Cr 3 -doped barium gallate (BGO:Cr) persistent luminescence (PersL) phosphors with enhanced luminescence were reported. The emission wavelength of the BGO:Cr PersL phosphors was adjusted from 715 to 739 nm by varying the amount of Cr 3 and the ratio of Ga:Ba. Meanwhile, the luminescence intensity and afterglow of the BGO:Cr PersL phosphors were enhanced. BGO:Cr PersL phosphors exhibited UV excitation, LED light restimulation, PersL for more than 6 days, and excellent capability for information storage, which was expected to promote the development of cheap and wavelength-tunable PersL materials for practical applications.