Electrical characterization and photovoltaic properties of 7,7′,8,8′ tertracyanoquinodimethane thin films

Thin films of 7,7′,8,8′ tertracyanoquinodimethane (TCNQ) were deposited using thermal evaporation technique. TCNQ was found to be polycrystalline in powder form and preferred to orient at one plane in thin films. The temperature dependence of the electrical resistivity of Au/TCNQ/Au device was studied. TCNQ thin films were deposited on p-GaAs single crystal substrate; the current-voltage and capacitance-voltage for TCNQ/p-GaAs junction sandwiched between two gold electrodes were investigated. The current of the device obeys the thermionic emission model in the voltage range of 0