Efficiency enhancement in DSSC using metal nanoparticles: A size dependent study

► The effect surface plasmons on Dye Sensitised Solar Cells was investigated. ► Au nanoparticles of size 20, 49, 75 and 94 nm were synthesised. ► The interaction between the incident light and gold nanoparticle showed a size dependence. ► The efficiency of the solar cell improved from 0.74% to 1.52% on employing 94 nm size Au particle.