Raman and X-ray photoelectron spectroscopic investigation of solution processed Alq3/ZnO hybrid thin films

In this study, we characterize the solution processed tris-(8-hydroxyquinoline)aluminum(Alq(3))/ZnO hybrid thin films using Raman and X-ray photoelectron spectroscopic (XPS) techniques. Raman studies reveal the sol-gel derived spin-coated ZnO thin film has hexagonal wurtzite structure. The incorporation of Alq(3) molecules in the hybrid film results in the formation of bonding onto the surface of highly crystalline ZnO nanoparticles. The XPS confirms the incorporation of Alq(3) in the hybrid thin films and corroborates that the Alq(3) molecules may be adsorbed onto the surface of ZnO nanoparticles (chemisorption), showing the existence of chemical interaction between Alq(3) and ZnO in the hybrid films. These studies support that the chemisorbed Alq(3) molecules onto the ZnO nanoparticles may facilitate the charge transfer (non-radiative) between Alq(3) and ZnO in the hybrid thin films which will be useful to enhance the optical and electrical properties for the optoelectronic device applications. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

In this study, Raman and XPS techniques were used to characterize tris-(8-hydroxyquinoline)aluminum(Alq(3))/ZnO hybrid thin films, revealing that Alq(3) molecules can chemisorb onto the surface of ZnO nanoparticles, facilitating charge transfer. This finding suggests potential enhancements in optical and electrical properties of the hybrid thin films.