High mobility transparent conductive Oxide for low bandgap solar cells

We have investigated the properties of ITiO (Indium Titanium Oxide) as an alternative to the more commonly used TCO´s, such as ITO (Indium Tin Oxide), ZnO:Al, and SnO₂:F. We have found that a mobility of 50 cm²/Vs could be reached at a consistently low sheet resistivity of <; 3×10⁴ Ωcm. The result is that the transmission exceeds 75% up to a wavelength of 1450 nm (0.85 eV), which constitutes a major improvement over conventional TCO´s that commonly show a sharp transmission drop at 950 nm.