Study of the Electrical Characteristics of Poly Para-Amino Benzaldehyde as Schottky diode Solar Cells application

Organic polymer semiconductors as new materials for solar cells (solar energy conversion) have been explored. In this study Schottky diode solar cells of Poly Para-Amino Benzaldehyde (PPAB) doped with (0.5) of Oxonium salt (AsF6), were fabricated at room temperature by cast technique. The current-voltage characteristics of the (Cu / PPAB / Al) structure was investigated under light (illumination) and dark conditions, and can be explained in terms of the charge transport mechanism operating in sample at different voltage regions and at different temperatures (303 – 343K). The electrical conductivity as a function of reciprocal absolute temperature (1/T) under illumination condition was investigated. It was found to be increases when temperature increase from (1.3x10-11 S/cm) at 303K to (1.5x10-9 S/cm) at 343K. This behavior indicates that the sample behaves as semiconductor material. The activation energy was obtained from the curve at room temperature as (0.53 eV), while the barrier height (?Bn) was obtained at room temperature (303K) as (1.61 eV) and (5.73 eV) at (343K). The electrical parameters [ideality factor (n), series resistance (Rs), saturation current (Is)], of the device are measured at different temperature.