Fabrication, electrical transport mechanisms and photovoltaic properties of methyl violet 2B/n-Si hybrid organic/inorganic solar cell

Hybrid organic-inorganic heterojunction solar cell, Au/methyl violet 2B (MV2B)/n-Si/Al, was fabricated. The MV2B films were deposited by spin coating technique onto n-type silicon single crystal wafer substrate with orientation <100>. The current-voltage characteristics of the heterojunction diode have been studied at a temperature range of 300-368 K and the voltage applied during measurements varied from -1 to 1 V. The device showed low series resistance of 518 Omega, high shunt resistance of 16 k Omega, rectification ratio of 33 at +/- 1 V and ideality factor of 2.67 at room temperature. The I-V characteristics of the diode showed that the conduction mechanisms of the diode are controlled by the thermionic emission at forward voltage bias <= 0.3 V and Ohmic conduction in the voltage range 03 < V <= 1 V. The capacitance-voltage characteristics of the device were studied at room temperature in dark condition. Photovoltaic parameters of the solar cell under illumination have been determined as: The open circuit voltage (V-oc), short circuit current (I-sc), fill factor (FF) and power conversion efficiency (eta) are 0.405 V, 0.15 mA, 029 and 237%; respectively. (C) 2016 Elsevier B.V. All rights reserved.