International Journal of Innovative Research and Development

Dulen Saikia , Nandita Goswami , Pallabi Phukan , P. K. Saikia , P. K. Gogoi

Abstract

In the present study we report the development of a new route for the synthesis of polymer-CdSe nanocomposite thin film by heat induced thermolysis reaction which is completely free from any complexing agents and toxic chemicals. The as synthesized polymer-CdSe th in films were characterized by X-ray diffraction (XRD), Transmission electron microscopy(TEM), UV-Vis and PL spectroscopy. The optical studies showed a direct allowed band gap of 2.5 eV . XRD and SAED pattern shows the polycrystalline nature of CdSe thin film with cubic structure. TEM and HRTEM images indicated the small sized nanoparticles of CdSe (~10 nm) with a good crystalline structure in the CdSe nanoparticles. A proto-type thin film solar cell of CdSe/CdTe was fabricated (1cm × 1 cm) on glass substrates by using this deposition technique for CdSe. The CdTe layer was deposited by vacuum evaporation technique. The current voltage (I-V) characteristics of the cells were measured with a keithley Source Meter(Model No:2400). The efficiency of the solar cell was found as 1.7 %.

Keywords

CdSe-polymer Nanocomposite, Thin Film, Solar Cell, Thermolysis

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R. P. Dutta , P. K. Saikia

Abstract

Group II-VI materials of periodic table are very suitable for electronics and optoelectronics application. A multilayer thin film is prepared on a chemically cleaned glass substrate by depositing CdS, CdTe, CdSe and ZnSe one after another using Thermal Evaporation Method. The vacuum inside thin film coating unit is maintained at 10^-6mbar. The electrical properties of this multilayered thin film have been investigated. The crystal structure and lattice parameter of individual and multilayered film are determined by X-ray diffractograms. The surface morphology of individual film was investigated by SEM analysis.

Keywords

Thin Film, X-ray Diffractogram, SEM

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