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3 November 2004 Schottky barrier formation and transport properties in copper phthalocyanine dispersed in polycarbonate
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Abstract
The electrical and photoelectrical properties of photovoltaic cells, made by dispersing particles of copper phthalocyanine (CuPc) in a binder polymer (polycarbonate MK) and sandwiching between gold nad indium electrodes, have been studied. A complete study of the current as a function of voltage and temperature is carried out. At low voltages, the current in the forward direction varies exponentially with voltage. At higher voltages, two separate regions of ohmic and space charge limited conduction (SCLC) are observed. The latter process is controlled by an exponential distribution of traps above the valence band edge. Analysis of the results enables the determination of the important trapping parameters. Reverse characteristics are interpreted in terms of both the Poole- Frenkel and Schottky effects. Barrier heights and widths are determined as a function of applied voltage. The photovoltaic parameters of the cells are determined from the analysis of the current -voltage characteristics under illumination. Trap density and Schottky barrier built in potential are estimated from capacitance-voltage measurements.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tharwat G. Abdel-Malik "Schottky barrier formation and transport properties in copper phthalocyanine dispersed in polycarbonate", Proc. SPIE 5520, Organic Photovoltaics V, (3 November 2004); https://doi.org/10.1117/12.558927
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