Photoelectric properties by interface effect of organic/inorganic(CuPc/PbTe) multilayer prepared by pulsed laser deposition and thermal evaporation

Highly crystallized CuPc/PbTe multilayer are prepared at substrate temperat ure from room temperature to 300 degrees C by pulsed laser deposition and t hermal evaporation method. From the measurement of AFM image, these all fil m exhibits composed of round grains and flat matrix. For observation the in terface effect of multilayer, we measured the transverse current-voltage ch aracteristics in the dark and under illumination. The photocarrier is gener ated in the CuPc layer and the electron-hole pairs are separated by the ste ep incline of the potential near the CuPc/PbTe interface. The CuPc/PbTe mul tilayers in the in-plane current-voltage curve exhibit larger photoconducti on effect than that of CuPc single layer.