Influence Of Blend Composition And Annealing Temperature On Optical Properties Of Organic Photovoltaic Cell Based On P3ht:Pcbm Interpenetrating Blend

In this paper, the influence of blend composition and annealing temperature on optical properties of organic photovoltaic (OPV) cells based on P3HT:PCBM interpenetrating blend is presented. Optical optimization of the OPV cell is first performed to determine the optimal geometry of the stack. The studied device structure is: glass/ITO/PEDOT:PSS/P3HT:PCBM/Ca/Al. Simulation results give as optimized thicknesses: d(PEDOT:PSS) = 27 nm and d(Active layer) = 91 nm. The optimized OVP cell gives a short-circuit current J(SC) = 12.48 mA/cm(2). The influence of technological parameters on the performance of the optimized P3HT:PCBM blend OPV cell is then clearly defined. Simulation results show that among the mass ratio of P3HT:PCBM blend active layers studied (1:1, 1:2, 2:1, 2:3 and 3:2), the active layer with the higher blend mass ratio (2:1) gives the best optical properties. Also, increasing the annealing temperature of the active layer leads to increase absorption. The blend active layer annealed at 140 degrees C presents the best optical properties of the OPV cell.