Luminescence properties of CsAlP2O7 crystals doped with chromium ions under VUV and UV excitation

Abstract The luminescence properties of CsAlP2O7 double pyrophosphate crystals, undoped and doped with chromium ions, under VUV and UV excitation have been investigated. Their luminescence spectra under high-energy excitation consist of several bands, covering wavelengths from 300 to 950 nm. The luminescence spectra of the undoped crystals consist of a complex wide band in the 275–800 nm range. The “red” luminescence band with maxima near 780 nm appears in the luminescence spectra of the crystals doped with chromium ions. The matrix own luminescence and luminescence of the centers formed by Cr3+ impurity ions are distinguished. The formation of various luminescence centers is considered.