X-ray and UV Excited Long Persistent Luminescence Properties of Zn 3 Ga 2 GeO 8 : Cr 3+ , Pr 3+

Near-infrared long persistent luminescence (NIR-LPL) has attracted increasing attention due to their potential applications in the different fields. The application of different scenes urges us to obtain NIR-LPL under the excitation of different light sources. Herein, we report NIR-LPL phosphors Zn 3 Ga 2 GeO 8 (ZGGO): Cr 3+ and ZGGO: Cr 3+ , Pr 3+ , which all shows excellent LPL properties. Either under UV excitation or under X-ray excitation, ZGGO: Cr 3+ exhibits NIR-LPL, with emission wavelength at ∼700 nm within the first biological tissue-transparent window (NIR-I: 650–950 nm). Moreover, by co-doping Pr 3+ , the LPL intensity of ZGGO: Cr 3+ , Pr 3+ is significantly enhanced, and the LPL duration time is also prolonged by 3 times under UV excitation and X-ray excitation. Our results provide the possibility for us to use a single matrix material in different environments.