High-Throughput Information Storage in An Intelligent Response Phosphor

Abstract: Persistent phosphor has emerged as a promising candidate for information storage due to the rapid accessibility and low-energy requirements. However, the low storage capacity has limited its practical application. Herein, we skillfully designed and developed NaGdGeO4:Pb2+,Tb3+ stimulated phosphor by trace doped Sm3+. As expected, this phosphor demonstrates the larger carrier capacity than traditional commercial SrAl2O4:Eu2+,Dy3+ phosphors and super-strong thermo-stimulated luminescence (TSL) that is three times greater than its photoluminescence (PL) intensity (PL efficiency: 17.3%). A mechanism of the enhanced and controllable TSL is proposed based on electron-hole defect pair structure. We further present a high-throughput optical data recording in five dimensions in a single fluorescent film recording layer. The findings described here provides not only a universal approach for construction TSL materials, but also a new paradigm for future generation optical storage technology.