No abstract

Cadmium sulfide (CdS) thin films have been deposited on glass/conducting glass substrates using low-cost chemical bath deposition method. The deposited films have been characterized using various techniques in order to optimize growth parameters. It has been confirmed by X-ray diffraction measurement that the deposited layers are mainly consisting of CdS phase. The PEC measurements indicate that the deposited CdS layer is n-type in electrical conduction, and optical absorbance measurements show that the band gap is 2.42 eV for as-deposited film and 2.27 eV upon heat treatment for one hour in air ambient. Both atomic force microscopy and scanning electron microscopy measurements indicate the formation of pinhole free and smooth surface of CdS films of nanosized grains. The electrical resistivity is also observed in the order of 1044 Ω cm and decreases as temperature increases.

No abstract

No abstract

High refractive index dispersant of silane coupling agent for nanoparticles were synthesized by thiol-ene reaction of 3-mercaptopropyltrimethoxysilane (MPTMS) and bis-(3-methylphenyl)fluorene allyl ether (BCF-allyl) . Zirconia nanoparticle dispersions were prepared by a bead milling process using this dispersant. Thus obtained zirconia nanoparticle dispersions show good dispersibility in MEK. Bis-phenoxyethanolfluorene diacrylate (BPEFA) and the zirconia nanoparticle dispersion formed homogenous mixtures in a wide variety of component ratio, and these coated thin films were photo-cured by UV irradiation with a photo-radical initiator. These hybrid thin films with zirconia nanoparticles indicated high refractive index and good transparency even at high particulate concentration.