where a 0 is the effective Bohr radius (18.9 Å for Sb The charge transport properties are calculated using amset, with the results shown in Figure . Figure illustrates how the conductivity changes with temperature at different carrier concentrations, from 1 order of magnitude smaller to 3 orders larger than the Mott Criterion value. The conductivity is more sensitive to temperature at lower carrier concentrations, with conductivity decreasing as temperature increases -as expected for band-like carrier transport. At carrier concentrations of 10 19 cm -3 , the conductivity can reach over 100 S cm -1 at room temperature, which can be increased to just under 10 4 S cm -1 at carrier concentrations of 10 21 cm -3 . Therefore, to achieve sufficient conductivity for TCO applications, high doping concentrations are needed in this system. The change of mobility with carrier concentration at room temperature is shown in Figure . A maximum mobility of around 106 cm 2 V -1 s -1 is obtained at low carrier concentrations, while it declines with higher carrier concentrations. The typical mobility for n-type TCOs is from 50 cm 2 V -1 s -1 to 70 cm 2 V -1 s -1 , and so Sb 2 O 5 has a competitive mobility compared with established TCOs. The analysis of the limiting scattering type for mobility is shown in Figure . Polaroptical phonon (POP) is the dominant limiting factor for carrier concentrations below 10 20 cm -3 across all temperatures above 300 K. For carrier concentrations over 10 20 cm -3 , the limiting scattering type becomes ionized impurity (IMP) at temperatures lower than 800 K.