Effect of electrical poling on the structural, dielectric and photoluminescence properties of small concentration of Ho+3 substituted NBT

Abstract The effect of electrical poling on the room temperature structural, dielectric and photoluminescence properties small concentration (i.e. 0.5 mole%) Ho +3 substituted sodium bismuth titanate ferroelectric material (Na Bi 0.495 0.005 TiO 3 abbreviated as NBT-0.5Ho) has been investigated. Its crystal structure was found to be mixture two phases rhombohedral (R3c) monoclinic (Cc) in which coexisted major phase. Comparative study X-ray diffraction (XRD) patterns electrically poled unpoled specimens NBT-0.5Ho revealed that electric field irreversibly transformed structural dominant Cc (≈-94.05% phase fraction) R3c (≈70.6% Dielectric value its dispersion with frequency were significantly decreased specimen is ascribed driven change. Two (PL) emissions at 655nm 756nm obtained NBT-0.5Ho. PL intensity considerably tuned term quenching. Obtain quenching correlated induced ordering towards higher symmetry confirmed from XRD analysis. Obtained additional functionality tuning opens possibility for optoelectronic devices applications.