Dielectric Relaxation Studies of Eu3+ Doped Graphene Oxide Nano Layers

Abstract

A bulk amount of Graphene Oxide nanosheets is prepared using the Modified Hummers’ Method. Rare earth material such as Europium nitrate pentahydrate compound is added to graphene oxide in varying percentages to study the dielectric behaviour of graphene oxide. Morphological analysis results reveal a nano sheet-like pattern in pure graphene oxide, while for the Europium-doped graphene oxide, a cluster of Europium atoms seems trapped between layers of graphene. The electron diffraction rings are indexed using multiphase analysis, and the hexagonal carbon structure remains unaltered in doped samples. Electrochemical Impedance Spectroscopy (EIS) studies are conducted on pure and Europium-doped graphene oxide. Frequency variations with the real and imaginary parts of dielectric constants are studied for both the composite material and the pure graphene oxide. Also performed are Photoluminescence (PL) studies. The emission spectrum of Eu³⁺ doped Graphene oxide is used to study the Judd-Ofelt parameters and allowed transition probability is determined.