Effect of TiO2 Nanofiber Density on Organic-Inorganic Based Hybrid Solar Cells

Abstract In this work, a comparative study of hybrid solar cells based on P3HT and TiO2 nanofibers was accomplished. Electrospinning, a low cost production method for large area nanofibrous films, was employed to fabricate the organic-inorganic hybrid solar cells based on poly (3-hexylthiophene) and TiO2 nanofibers. The performance of the hybrid solar cells was analyzed for four density levels of TiO2 nanofibers, which resulted in the average power conversion efficiency of about 0.0134 % under AM 1.5 simulated illuminations (100 mWcm-2). It is found that the higher densities of TiO2 lead to more interfaces area and generating exciton, so the power conversion efficiency will be increased till the active layer thickness is about 400 nm but with increasing thickness more than 400 nm the increasing density hasn’t positive effect.