PHOTOLUMINESCENCE AND STRUCTURAL PROPERTY OF Ce3+ DOPED KCl SINGLE CRYSTALS

Abstract

In the present work, namely Ce3+
doped KCl single crystals for light emitting diode applications were
grown by Bridgeman Stockbarger technique and characterized by Photoluminescence[PL], Powder X-Ray
Diffraction[PXRD], Fourier Transform Infrared[FTIR], Scanning Electron Microscopy[SEM], and Vickers
Microhardness[HV], Electron Paramagnetic Resonance[EPR].The PL spectrum of the KCl:Ce3+
crystals shows a
broad emission band centered at 428nm and 453nm. X-ray diffraction analysis exposed a cubic structure for the
grown crystals. FTIR spectrum were used to analyze the various functional groups of the grown crystals. SEM
contribute information about the surface morphology of the crystal. Mechanical strength of the grown crystals is
estimated by Vicker’smicrohardness test. The work hardening co-efficient ‘n’ value is 2.8, this value indicates that the
soft material category for the grown crystals. EPR measurements were made at X-band frequencies with 9-10 GHz field
modulation at room temperature and the g-factor value are 2.3 and 2.2, calculated by using Lande’s formula.