High mobility transparent conductive Oxide for low bandgap solar cells

Abstract

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.