Enhanced UV–vis photoconductivity and photoluminescence by doping of samarium in ZnO nanostructures synthesized by solid state reaction method (original) (raw)

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UV Photoluminescence of ZnO Nanostructures Based Thin films synthesized by Sol Gel method

2016

During past few decades, Zinc oxide thin films have gained much interest of the researchers, due to its applications in the wide range of fields of optoelectronic devices, photovoltaic, semiconductor lasers and modern LED’s. Selection of proper growth technique for ZnO nanostructures governs several structural and electrical parameters. ZnO shows n-type behavior naturally, donor defects are responsible for emission of UV spectra. ZnO is a wide band gap material with excellent physical properties, good heat conductor, transparent, electron mobility is high and it is non-toxic. Nanostructures based ZnO thin films are prepared using sol-gel and spin coating method. XRD results reveals hexagonal structure of ZnO. Photoluminescence in the utra-violet range maybe due to near-band-edge (NBE) transitions. Ultra violet emissions are observed and can be induced by the band edge recombination of ZnO. This ultra-violet luminescence has origin in free exciton emission. UV luminescence is due to ...

Photoluminescence and photoconducting properties of ZnO nanoparticles

Solid State Communications, 2009

Photoluminescence and photoconducting properties of thinfilms of colloidal ZnO nanoparticles have been investigated by annealing them in an oxygen atmosphere at different temperatures. The changes in the defect-related emission and the photoconducting properties with the annealing temperature have been examined in detail.

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