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

In this work, a comparative study of hybrid solar cells based on P3HT and TiO2 nanofibers wasaccomplished. Electrospinning, a low cost production method for large area nanofibrous films, wasemployed to fabricate the organic-inorganic hybrid solar cells based on poly (3-hexylthiophene) and TiO2nanofibers. The performance of the hybrid solar cells was analyzed for four density levels of TiO2nanofibers which resulted in the average power conversion efficiency of about 0.0134% under AM 1.5simulated illuminations (100 mWcm-2). It is found that the higher densities of TiO2 lead to more interfacearea and generating exciton, so the power conversion efficiency will be increased till the active layerthickness is about 400 nm; but, with increasing thickness more than 400 nm the increasing density did nothave positive effect