The photostimulable storage phosphors exhibiting PSL phenomenon can act as excellent imaging plates for optical information write-in and read-out. The optical information write-in and read-out processes require optically illuminating the phosphor plate twice.
This is one of the highest energy density values reported thus far. Furthermore, an exceptional light-induced charging capability was demonstrated with phosphor-incorporated supercapacitors. A light-induced charging voltage of up to 354 mV was
In this review paper, I will focus on storage phosphor materials for passive dosimetric detectors and their application to ionizing radiation monitoring.
Light-emission phenomena of storage phosphors have received widespread attention, provoking the continuous developments of persistent luminescence, photostimulated luminescence, and mechanolumi-nescence.
In 2023, Du et al. reported that the single-rare-earth-doped phosphor, Sr 2 YGaO 5:Sm 3+, exhibits multi-responsive luminescence, providing a novel concept for designing inorganic phosphor-based multifunctional optical materials.
The present study successfully harvested visible light to improve the energy density and light-induced charging capacity of a supercapacitor by including a phosphor layer over the electrodes.
We report a deep-trap ultraviolet persistent phosphor with thermoluminescence glow peaks beyond 500 K that exhibits intense and long-lasting ultraviolet luminescence under indoor lighting
Long afterglow phosphors possess the unique "charge storage pool" effect, which enables the photocatalytic clean energy evolution under both day and night, so as to achieving efficient and round-the-clock clean energy preparation.
Phosphor-based optical storage technologies have made significant strides in encoding and decoding processes, yet persistent challenges in flexible, multi-level storage remain.
Wu, H. et al. Optical storage and operation based on photostimulated luminescence. Nano Energy 90, 106546 (2021). Zhang, J. M. et al. Giant enhancement of a long afterglow and optically stimulated luminescence phosphor BaCaSiO 4: Eu 2+ via Pr 3+ codoping for optical data storage. J. Lumin. 263, 119971 (2023).
On the other hand, photostimulable storage phosphor materials, which can once store information of ionizing radiation, can be applied only for passive detectors, which are called “dosimeters”, such as thermally stimulated luminescence (TSL) dosimeters, optically stimulated luminescence (OSL) dosimeters, and radiophotoluminescence (RPL) dosimeters.
The distinctive capability of PSL materials to absorb, store, and release energy on-demand has sparked extensive research and application of these storage phosphors in various critical fields, such as dosimetry, computed radiography, and optical information storage 20, 21, 22.
Furthermore, optical data storage application usually requires the storage phosphors to have a large trap depth (usually >1 eV) and high trap density to ensure storage efficiency in dark environments and high PSL efficiency upon external light stimulation.
The OSL process in photostimulable storage phosphor materials can be useful for two-dimensional imaging of ionizing radiation dose,(3) since two-dimensional scanning with the stimulation light beam on the phosphor sheets, the “imaging plates” (IPs), is very easy.
In this case, storage phosphors emitting in the deep ultraviolet region are preferred, considering that deep ultraviolet radiation encompassing the light spectrum over 200–300 nm, does not overlap with room light and can be detected with zero background noise in a bright indoor-lighting environment 34, 35, 36, 37, 38.
