Farbrication Of Buffer Layer Of Polymer Solar Cells And Optimization Of Polymer Solar Cells

Polymer solar cell has been paid more attention on by the researcher, forwhich it is low cost and promising to use printing or roll to roll routes for massproduction. The buffer layer material is very important to obtain ahigh-efficiency polymer solar cell. In this paper, the process of fabricated ofnormal and inverted structure polymer solar cells in the air has been optimizedThe buffer layer materials synthesized by the lab has been used for polymersolar cell.The samples of graphene oxide, the composite of graphene oxide andCoNi2S4, nickel oxide film, TiO₂film and TiO₂nanorod array have beencharacterized by using scanning electron microscopy （SEM）, transmissionelectron microscopy （TEM）, X-ray diffraction （XRD）, Raman spectroscopy（Raman）.The effect of the heat treatment, the solvent annealing treatment and thesmall molecule additives on the conventional structure polymer solar cellswhich active layer was composes of P3HT and PCBM have been optimized inthe air. And the conventional structure of polymer solar cell efficiency hasreached2.55%. At the same time the graphene oxide and nickel oxide filmapplied as hole transport layer material in the Polymer solar cells was studied.The optimization of power conversion efficiency of inverted structurepolymer solar cell that the TiO₂film was selected as electron transport layer was1.77%. The performance of new structure that TiO₂film/TiO₂nanorod wasbetter than the same thinckness cell that TiO₂film as electron transport layertransport layer and the efficiency has reach1.78%。Electrochemical impedance spectroscopy explain how the thickness ofbuffer layer and composite structure affect the performance of polymer solarcell.