The effect of metal oxide nanoparticle concentrations in PEDOT:PSS layer on the performance of P3HT:PCBM organic solar cells

摘要

An improved organic solar cell was obtained by focusing on the effects of metal oxide nanoparticles (NPs) concentrations in the buffer layer. The performance was compared by mixing metal oxide nanoparticle into PEDOT:PSS (Poly(3,4 ethylenedioxy-thiophene) Poly(styrene-sulfonate)) based buffer layer. We studied the effect of Fe_2O_3 NPs by changing its concentration from 0.1 to 1 wt.%. Increasing concentrations of NPs showed good light absorption ability. The solar cells with a bare active layer showed a power conversion efficiency (PCE) of 2.79% while with Fe_2O_3 NPs at 0.7 wt.% concentration, showed higher performance resulting a PCE of 3.68% under AM 1.5G illumination. A decline in PCE was seen at 1 wt.% of Fe_2O_3 NPs. This phenomenon was also compared with the use WO_3 NPs in place of Fe_2O_3 NPs.