Epitaxial YBa2Cu3O7−xnanocomposite thin films from colloidal solutions

Epitaxial growth of thin films

The term ‘epitaxial’ is applied to a film grown on top of the crystalline substrate in ordered fashion that atomic arrangement of the film accepts crystallographic structure of the substrate. Epitaxial growth is one of the most important techniques to fabricate various ‘state of the art’ electronic and optical devices. Modern devices require very sophisticated structure, which are composed of t...

Epitaxial Growth of Thin Films

This chapter gives an introduction to the epitaxial growth of thin films on solid substrates. The term epitaxy refers to the growth of a crystalline layer on (epi) the surface of a crystalline substrate, where the crystallographic orientation of the substrate surface imposes a crystalline order (taxis) onto the thin film. This implies that film elements can be grown, up to a certain thickness, ...

MOCVD growth of non-epitaxial and epitaxial ZnS thin films

Thin films of ZnS have been deposited by MOCVD on both BaTa206/ITO/glass and Si substrates. Diethylzinc (DEZn) and H2S are used for deposition on substrates heated to the 250-400°C temperature range. The microstructure and properties of ZnS films were studied by X-ray diffractometry (XRD), ultraviolet/visible spectrophotometry (UVS) and scanning electron microscopy (SEM). Films prepared on BaTa...

Temperature Dependent Excitonic Photoluminescence from Epitaxial ZnO Thin Films

We have studied the photoluminescence of highly transparent and c-axis oriented ZnO thin films grown on (0001) sapphire by Pulsed Laser Deposition at different temperatures ranging from 10K to 300K. We observed temperature dependent recombination from free excitons, bound excitons and LO phonon assisted free and bound excitonic transitions. The energies of free excitonic transitions are close t...

Ferromagnetism in nanocrystalline epitaxial Co:TiO2 thin films