Long persistent and photo‐stimulated luminescence in Pr3+‐doped layered perovskite phosphor for optical data storage

Abstract As the time for big data is coming, the demand for data's storage density and capacity exerts explosive growth. However, traditional optical storage is hard to get rid of the bottleneck of optical diffraction limit. The persistent luminescence materials could be used for optical data storage based on the photon trapping and de‐trapping mode. Herein the performance of thermoluminescence ( TL ), photo‐stimulated luminescence, and photoluminescence of Pr 3+ ‐doped Ca 4 Ti 3 O 10 were studied in order to explore the optical storage property of this material. The TL glow curves show that the deep‐trap in Ca 4 Ti 3 O 10 :0.01Pr 3+ , Y 3+ has a narrow distribution from 0.9 to 0.98 eV, which is qualified for maintaining the recorded data at RT for a long duration time. NIR photo‐stimulated red persistent luminescence ( NIR ‐to‐red mode) as presented in the Y‐containing Ca 4 Ti 3 O 10 :Pr 3+ phosphor could be a promising technique for optical data storage.