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• Optical stimulated luminescence is observed from SrAl 12 O 19 : Mn2+, Gd3+. • The detrapping of electrons is operable by controlling the IR laser. • An optical information storage that integrate a writing-storing-readout-erasing-rewriting is realized. In the current big data era, state-of-the-art optical data storage has become a front-runner in competing data storage technologies. In this work, we propose an information storage prototype using optical stimulated luminescent phosphor of SrAl 12 O 19 : Mn2+, Gd3+, which converts the photon into trapped electrons and partially releases them in a form of luminescence when irradiated by infrared irradiation, rendering an optical information storage ability. Information storage can be realized in both graphical and digital formats. In this way, graphical patterns can be stored and rejuvenated by infrared irradiation, and a set of digital data is recorded step by step by a home-make decoding system, completing an optical data reading process. This work provides a practical example for future application of writing-storing-readout-erasing-rewriting integrated optical information storage. [ABSTRACT FROM AUTHOR]

Abstract A dual-emission long persistent luminescence phosphor SrZrO 3 : Yb3+ is synthesized through a conventional high-temperature solid-state reaction method. A combined experiment and first-principles methods are carried out to study the inner link between the electronic structures and spectroscopic characteristics of SrZrO 3 : Yb3+ phosphor. The calculation shows that the incorporation of Yb3+ ions into SrZrO 3 lattice can be done through substituting Yb3+ ions for Sr site. It is found that vacancy defects of SrZrO 3 : Yb3+ system easily produce around the doping positions. Especially, the oxygen vacancies, which are deduced as the intrinsic vacancy defect, are responsible for the persistent luminescence in SrZrO 3 : Yb3+ phosphor. The persistent luminescence of SrZrO 3 : Yb3+ consists of two parts: near-ultraviolet persistence originate from self-trapped excitons of host, and near-infrared one stems from 2F 5/2 → 2F 7/2 transitions of Yb3+. The photoluminescence and persistent performance are studied as function of the concentration of Yb3+ ions. The optimal concentration of Yb3+ ions for the photoluminescence emission and long persistent luminescence are both approximately 2.5%. The long persistent luminescence mechanism for SrZrO 3 :Yb3+ is illuminated on the basis of photoluminescence and first-principle calculation results. Highlights • SrZrO 3 : Yb3+ presents a dual-emission (NUV and NIR) long persistent luminescence. • Oxygen vacancies in SrZrO 3 :Yb3+ play an important role in the persistent luminescence. • The PL and calculation results confirm the persistent mechanism of SrZrO 3 :Yb3+. [ABSTRACT FROM AUTHOR]