Abstract
Ultrathin films of tetra-tert-butyl-phthalocyaninato-iron (FettbPc) mixed with promoting stearic acid (SA) were deposited on clean and Al-coated glass substrates by the Langmuir-Blodgett (LB) method. The LB films were investigated by X-ray diffraction (XRD) analysis, UV-visible spectroscopy and FT-IR to determine their structures and to analyze the optical and electrical properties. The photovoltaic efficiencies of solar cells composed of Al/FettbPc:SA LB film/Au and Al/CuttbPc:SA LB film/Au were 1.65×10-5% and 3.20×10-6%, respectively. The junctions at Al/Pc seem to be disrupted by interfacial layers of Al2O3. The magnitudes of the efficiencies were smaller than those of Al/In/M-Pc/Au cells, fabricated by an evaporation method, by a factor of 2 or 3.
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