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Preparation, characterization, Optical and Photoluminescence studies of gamma rayed Erbium doped nanocrystalline CaF2

Venkata Reddy G N

Erbium doped Calcium fluoride (CaF2) nanoparticles are synthesized by coprecipitation method. Preliminary characterization of the samples are carried out using PXRD, SEM and FTIR. The nanoparticles are irradiated with -rays and optical absorption and Photoluminescence measurements are made on the irradiated samples. From the study of optical absorption (OA) spectra various color centers responsible for the absorption are identified.Photoluminescence (PL) spectrum exhibited emission peaks at ~387, 442, 460 and 517 nm. The mechanisms of OA and PL of the observed samples are discussed in detail.