Electronic Properties and Photoresponse of Polycarbazole-Multiwalled Carbon Nanotube Nanocomposite/Aluminum Schottky Diode

We report an electrochemically synthesized polycarbazole (PCz)-nitrogen doped multiwalled carbon nanotube (n-MWNT) nanocomposite-based organic Schottky diode. The current-voltage (J-V) and capacitance-voltage (C-V) characteristics of the Schottky diode were studied and subsequently used for extracting the electronic parameters of the device. A significant enhancement in the photoresponse of the device in comparison to pure PCz Schottky contact was observed under illumination with a laser source operating at 650 nm having an incident optical power density of 10 mW/cm
²
. The nanocomposite was studied for its structural/morphological properties using scanning electron microscope and high-resolution transmission electron microscope.