Combustion Synthesis and Photoluminescence Studies of Blue-Emitting CaAl_(12)O_(19):Ce~(3+) Lamp Phosphors

摘要

The spectroscopic properties of Ce~(3+) with a favorable response and the ability to integrate the Ce~(3+) ion into diverse host inorganic material, trivalent cerium-activated material is activated with cerium ion cover transformed interest for most of the applications. These materials recombine with high light capitulate, constructive emission wavelength, and faster fluorescence decay with stability of temperature, which make them attractive for use in detectors for elevated energy physics and also medical imaging. Therefore, with the support of outstanding luminescence properties, inorganic materials activated with Ce~(3+) ions are applied in lightings industries, detectors with display systems for ionizing radiation. Here synthesis and photoluminescence (PL) investigation of CaAl_(12)O_(19):Ce~(3+) carried out using combustion synthesis method. The structural and morphological studies and confirmation of phase and purity are done using XRD and SEM. PL spectra of Ce~(3+) due to the 4f-5d transition of Ce~(3+) ions peaking at 331 nm. The photoluminescence emission spectra of CaAl_(12)O_(19):Ce~(3+) phosphor exhibit blue emission band centered at 440 nm. Usually, configuration of Ce~(3+) ion in ground state is divide into two levels, viz., ~2F_(5/2) and ~2F_(7/2) whereas the 5d1 excited configuration is divide by the crystal playing field ranging from 2 to 5 components.