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Effect of Different Annealing Methods on the Performance Parameters of PEDOT:PSS/n-Si Solar Cells

PEDOT:PSS have shown promising results as hole selective and passivating layer in organic-inorganic hetero-junction solar cells. It not only passivates the silicon surface, but also has high conductivity in its pristine form to be used as a passivating hole transport layer. These properties can be enhanced by treating the layer with surfactants and co-solvents, respectively. In addition, annealing of the spin coated PEDOT:PSS films play a vital role as it influences the interface properties. Here we have compared two ways of annealing the spin coated PEDOT:PSS film to explore their impact on performance of Solar cells. The first method (Method A) involves a gradual increase in the annealing temperature of spin coated samples, while in the second method (Method B) the spin coated samples are directly subjected to annealing at a high set temperature. Our results indicate that the later method improves efficiency and hence could be of interest towards further process optimization.