OICC Press International Nano Letters 2228-5326 3 1 (December 2013) 2013 07 30 Strong localization of the charge carriers in CdSe nanostructural films 10.1186/2228-5326-3-47 EN Nader Ghobadi Physics Department, Faculty of Science, Malayer University, Malayer, IR Rostam Moradian Physics Department, Faculty of Science, Malayer University, Malayer, IR Journal Article 2013 07 30 Abstract Cadmium selenide nanoparticle films were deposited on usual glass substrate by chemical bath deposition method. Temperature dependence of dc conductivity of the present samples was studied. In the nanocrystalline materials due to small size of grains and confined charge carriers, the electronic states near the Fermi level are localized. When states are localized, the conduction occurs by hopping of carriers between the occupied and unoccupied localized states. Variable range hopping was identified as a predominant conduction mechanism and occurs above room temperature. The density of localized states near the Fermi level was observed to increase with increase of average grain size in the film.