Full‐Spectrum Persistent Luminescence Tuning Using All‐Inorganic Perovskite Quantum Dots

Abstract

The applications of persistent luminescence phosphors as night or dark‐light vision materials in many technological fields have fuelled up a growing demand for rational control over the emission profiles of the phosphors, which, however, remains a daunting challenge so far. Herein, we report a unique strategy to fine‐tuning the persistent luminescence by using all‐inorganic CsPbX3 (X = Cl, Br, and I) perovskite quantum dots (PeQDs) as efficient light conversion materials. Full‐spectrum persistent luminescence with wavelengths covering the entire visible spectral region is achieved through tailoring of the PeQDs bandgap, in parallel with narrow bandwidth of PeQDs and highly synchronized afterglow decay due to the single energy storage source. These findings break through the limitations of traditional afterglow phosphors, thereby opening up new opportunities for persistent luminescence materials towards many revolutionary applications such as making a white‐emitting persistent light source and dark‐light multicolor displays.