Fabrication of light emitting diode with ZnO nanorods on polymer coated silicon substrate

Abstract

ZnO nanorods are grown on p-type silicon substrates coated with a light emitting polymer PFO. Powdered PFO is mixed in toluene and spun coated on the Si substrate and heated before growing ZnO nanorods on them. PMMA solution in toluene is then spun coated on the nanorods to work as an insulating layer and the tips were etched using oxygen plasma. With Au and Al metal being used as top and bottom contacts, we fabricate a hybrid light emitting diode structure. In this work, we report the electrical and optical performances of the fabricated light emitting diode with a hybrid structure of Au/ZnO nanorods/PFO/ p-Si/Al. This fabricated heterojunction LED with 1 dimensional ZnO nanostructures exhibited IV characteristics of diode and photoluminescence were observed in a broad yellow-green spectrum.