Photoluminescence Analytical Study of Ce3+‐Activated Blue‐Emitting SrAl12O19 Lamp Phosphors

Abstract

AbstractBecause of the favorable spectroscopic properties of Ce3+ and the ability to incorporate trivalent cerium ion into many different host materials, trivalent cerium‐activated materials have received renewed interest for many applications. These prepared materials combine with higher yield, emission wavelength with favorable response, faster decay studies of luminescence, and stable temperature, which makes them attractive for uses in high‐energy physics research area and medical imaging applications. Therefore, based on exceptional properties of luminescence, Ce3+‐activated inorganic materials are applied in displays, lightings applications, and others for radiation ionizing. Cerium ions can be stabilized in host material in trivalent oxidation state. Here, synthesis and photoluminescence (PL) investigation of SrAl12O19:Ce3+ is carried out using combustion synthesis method. The structural and morphological studies and confirmation of phase and purity are done using XRD and morphological terms identified with the help of SEM. PL excitation and emission spectra of SrAl12O19:Ce3+ phosphors, which shows a wide absorption band in the range of 280–380 nm due to the 4f–5d transition of Ce3+ ions peaking at 331 nm. The PL emission spectra of SrAl12O19:Ce3+ phosphor as shown in figure exhibit blue emission band centered at 442 nm. Usually, configuration of Ce3+ ion in ground state is divide into two levels viz., 2F5/2 and 2F 7/2, whereas the 5d1 excited configuration is divided by the crystal playing field ranging from two to five components.