Fabrication and characterization of 4-tricyanovinyl-N,N-diethylaniline/p-silicon hybrid organic-inorganic solar cells

Abstract

Hybrid organic-inorganic solar cell was fabricated by thin film of 4-tricyanovinyl-N,N-diethylaniline deposited on p-Si substrates. The capacitance-voltage characteristics indicated that the junction is of abrupt nature. The dark forward current density-voltage characteristics indicated a tunneling conduction at relatively low voltages followed by a space-charge-limited-conduction mechanism at relatively high voltages. Under illumination, the cell exhibits photovoltaic characteristics with an open-circuit voltage of 0.70 V, a short-circuit current density of 9.15 mA cm-2, and a power conversion efficiency of 3.10%. The effect of γ-rays irradiation (100 kGy absorbed dose) on the characteristics of the cell was also investigated. The fill factor and the power conversion efficiency decrease by 20.9% and 39% of the original value, respectively. © 2007 Elsevier B.V. All rights reserved.