Preparation and Structural Characterization of Superionic Conductor RbAg 4 I 5 Crystalline Grain Film

Superionic conductor RbAg 4 I 5 crystalline grain films were prepared by vacuum thermal evaporation on NaCl crystalline substrates. The surface morphology, microstructure and the electronic energy states of the films were examined by atomic force microscopy, transmission-electron microscopy, x-ray diffraction and x-ray photoelectron spectroscopy. The results show that the obtained RbAg 4 I 5 layer has an epitaxial film of perfect crystalline structure, and the unit cell of crystalline grain RbAg 4 I 5 films belongs to cubic crystal system. The principal x-ray diffraction peaks at d = 3.7447 and 1.8733 Å are related to the structure of ternary compound RbAg 4 I 5 films.