Owing to the unique mechanism of photoelectron storage and release, long persistent
phosphorescence, also called long persistent luminescence or long lasting afterglow …

Ever since the discovery of SrAl2O4: Eu, Dy persistent afterglow material, that can
intensively glow up to 20 h, the mechanism of long-lasting luminescence has been a …

Persistent luminescence or afterglow is caused by a gradual release of charge carriers from
trap** centers. The energy needed to release these charge carriers is determined by the …

Multifunctional phosphors with photochromism and persistent luminescent (PersL)
properties have attracted increasing interest owing to the capability of absorbing the photon …

Light sensors are widely used to monitor light intensities, for instance in medical
applications, in agriculture or for conservation of art. Most of these sensors are electronic …

With do** concentration varying from 0.1 to 5.0 mol%, a series of Dy3+ doped calcium
aluminate (CaAl2O4: Dy3+) phosphors were synthesized via a sol–gel combustion …

In recent years, a wide range of persistent phosphors with different emission colors have
been developed. Most of these compounds require excitation in the ultraviolet or blue part of …

We made a systematic investigation on the optical properties of non-doped and Cr-doped
ZnxGa2O3+ x (0.98≤ x≤ 1.02) spinel crystals. Absorption, photoluminescence excitation …

Different phosphors emit different wavelengths of light depending upon the doped impurity
ions. They have various applications in the technological fields. Therefore, the majority of …

Persistent luminescence is the phenomenon whereby a material keeps emitting light for
seconds to hours after the excitation has stopped. This chapter describes the history of this …