Performance of P3HT/c-Si hybrid solar cell

The perfornmance of Au / P3HT (poly [3-hexylthiophene]) / n-type crystalline silicon (n-c-Si) / Al heterojuntion hybrid solar cells are presented. A P3HT layer with 80 nm thick was spin-coated on silicon substrate followed by thermal annealing and metal deposition. The capacitance-voltage measurements showed that the junction is abrupt. The conduction mechanism over temperature range from 300K to 360K is multi-step tunneling for medium voltage values from 0.2 V to 0.5V. Afterwards, the current-voltage characteristic is affected by a relatively high series resistance. The solar cell performance under 60mW/cm² illumination was: VOC = 0.40 V, Isc = 10.0 mA/cm², FF = 0.37 with the conversion efficiency of 2.46 %.