Organic Electronics & Materials Research Laboratory

                           Department of Physics & Astrophysics, University of Delhi, India

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99.9% regioregular poly(3-hexyl thiophene) was synthesized using Sugimoto method. Zinc sulphide (ZnS), Zinc Selenide (ZnSe), Zinc Telluride (ZnTe) nanoparticles (~8-20 nm) capped with P3HT were synthesized in various concentrations for enhancing photoconducting properties of P3HT. Optical investigations indicated charge transfer process at the interface between ZnX nanoparticles and P3HT.The work led to remarkable improvement in the light dependent charge transport properties.

To improve the photovoltaic properties of P3HT by broadening the absorption in the UV-Visible spectrum, enhancing the charge carrier mobility, and improving the polymer-nanocrystals interaction, CdX (X =S, Te) nanocrystals have been in-situ grown in the P3HT matrix without using of any surfactant. The effect of post thermal annealing also improved device performance.The efficiency and the current density of solar cell devices enhanced after thermal treatment at 150℃ for 10 min. CdX quantum dots worked as transport media along/between the polymer chains, which facilitate percolation pathways for charge transport.