Influence of the Coordinated Ligand on the Optical and Electrical Properties in Titanium Phthalocyanine-Based Active Films for Photovoltaics.

Tetravalent titanyl phthalocyanine (TiOPc) and titanium phthalocyanine dichloride (TiClPc) films were deposited via the high-vacuum thermal evaporation technique and subsequently structurally and morphologically characterized, to be later evaluated in terms of their optoelectronic behavior. The IR and UV-vis spectroscopy of the films displayed α- and β-phase signals in TiOPc and TiClPc. Additionally, the UV-vis spectra displayed the B and Q bands in the near-UV region of 270-390 nm and in the visible region between 600 and 880 nm, respectively.