Exploring zinc oxide/cerium oxide/indium tin oxide nano-structures as LEDs: An optical and structural investigation

Abstract

Multilayer optoelectronic devices play a crucial role due to their ability to combine the novel properties of dissimilar materials for superior performance leading to enhanced or novel functionalities. This study focuses on designing, fabricating and characterizing a novel nano multilayer structure of zinc oxide/cerium oxide/ITO in a simple chemical method. X-ray diffraction (XRD) and scanning electron Microscopy (SEM), UV-visible, and photoluminescence were investigated. Optical properties revealed two wide band gaps of 3.15eV for prepared multilayer structures. The multilayer devices exhibit a broad photoluminescent peak at 340eV. Results show significant improvements in charge carrier, optical absorption and quantum efficiency. Addition of the cerium layer enhances conductivity and photocurrent of nano structures by facilitating electron-hole pair separation under photo excitation. These findings highlight the importance of the prepared multilayer nano structure in various optoelectronic technologies such as photodetectors, sensors and light emitting diodes.