Abstract
Perovskite-structured stannate La0.05Sr0.95SnO3 and La0.05Ba0.95SnO3 films were deposited on SrTiO3, LaAlO3, LSAT, PMN-PT, and MgO substrates using pulsed laser deposition, respectively. The effects of substrates on the structure, transport properties, and optical properties of the films were investigated in detail. High-resolution X-ray diffraction results revealed the epitaxial growth of all films on each substrate without any impurity phase, and a high lattice quality indicated by the rocking curves. Atomic force microscopy images confirmed the low root-mean-square roughness observed in all films. Hall effect measurements showed that the maximum mobility was obtained for both La0.05Sr0.95SnO3 films and La0.05Ba0.95SnO3 films grown on SrTiO3 substrates, with values of 26.46 cm2/Vs and 43.09 cm2/Vs, respectively. The temperature dependence of resistivity at low temperatures was attributed to e−-e− interactions. Optical transmittance spectra showed high transparency of all films in both visible and near-infrared regions. Collectively, these results indicate that La-doped SrSnO3 and BaSnO3 films exhibit excellent performance across various substrates, providing a wide range of options for optoelectronic device applications.
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