Photoluminescence with a Quasi-White Spectrum in LiF–UO₂ Crystals with Color Centers

The authors study spectral characteristics of LiF–UO₂ crystals with radiation-induced color centers and their stability under emissions of a blue light emitting diode. A luminescence band with the bandwidth of 500–750 nm is observed upon such excitation, indicating LiF crystals containing a uranium impurity and radiation-induced color centers (F₂, \({\text{F}}_{3}^{ + }\) ) can be used as a phosphor for white light sources that has high stability due to special radiation treatment.