Strong conductivity enhancement of La-doped BaSnO(3) transparent films on Al(2)O(3) with the assistance of templated epitaxy for electromagnetic shielding in extreme environments

Transparent La-doped BaSnO(3) (BLSO) epitaxial films grown on expensive perovskites show promising conductive properties. However, BLSO films on Al(2)O(3) have a higher sheet resistance by two orders of magnitude. In this research, the sheet resistance of BLSO films is recovered to that of the single-crystalline level by growing (111)-oriented BLSO epitaxial films on (0001)Al(2)O(3) with the assistance of (111)BaZrO(3)/MgO template bilayer. Their intriguing transparent conductive properties, including high electromagnetic shielding effectiveness (~ 13.2 dB at 10 GHz) and high stability at 700 °C, will promote stable optoelectronic applications in extreme environments with economic benefits. GRAPHICAL ABSTRACT: [Image: see text] SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s40580-023-00355-9.