Influence of ZnS quantum dots on optical and photovoltaic properties of poly(3-hexylthiophene)

► Effects of ZnS nanoparticles inclusion on the properties of P3HT were investigated. ► Absorption and Raman spectra show the reduction in conjugation length and inter-chain interaction of the polymer. ► Significantly quenched luminescence confirms the occurrence of charge transfer between the constituents. ► Small amount of ZnS incorporation leads the significant enhancement in Voc.