Temperature-dependent properties of organic-on-inorganic Ag/p-CuPc/n-GaAs/Ag photoelectric cell

It was observed that cell parameters such as rectification ratio; threshold voltage; nonlinearity coefficient; junction, shunt and series resistances; diode ideality factor and power conversion efficiency were temperature-dependent. Moreover, experimental data showed that open-circuit voltage decreases with an increase in frequency whereas short-circuit AC current falls with frequency but remains constant as a function of temperature. It was further observed that the short-circuit DC current remained constant with an increase in frequency as well as temperature. Based on the experimental data an equivalent circuit of photoelectric cell was proposed to explain the observed behavior.