High mobility transparent and conducting oxide films of La-doped SrSnO _3

The synthesis and characterization of high mobility thin films of La-doped SrSnO _3 are reported. The mobility for the 7% La-doped sample was found to be 228 cm ^2 V ^-1 s ^-1 . The observed high mobility was associated with the reduced carrier effective mass and scattering centers of various scattering mechanisms. The enhancement in mobility and the increase in carrier concentration after doping reduced the resistivities of the thin films by five orders of magnitude. X-ray absorption spectroscopy and X-ray photoelectron spectroscopy revealed that La-dopant and oxygen vacancies donated the electrons in the films. Films were highly transparent (> 90%) in the visible region. These materials have great potential to be used in optoelectronic and heterostructure devices