Now showing items 1-10 of 67
Oxygen related defects excitation and photoconductivity dependence of SnO2 sol-gel films with several light sources
Since oxygen vacancies act as donors in SnO2, the electrical properties are related to deviation from stoichiometric composition. Depending on stoichiometry SnO2 can be highly insulating or may exhibit fairly high n-type ...
Light-intensity dependence of the steady-state photoconductivity used to estimate the density of states in the gap of intrinsic semiconductors
(Elsevier Science Sa, 2005-09)
We present a method to obtain the density of states of photoconductive semiconductors based on the light-intensity dependence of the steadystate photoconductivity. A simple expression—relating the density of states at the ...
A concentration-dependent model for silver colloids in nanostructured sol-gel materials
(SPIE Proceedings, 2013-01-16)
Modulated photoconductivity in the high and low frequency regimes
(Elsevier Science, 2008-12)
Different methods have been proposed to use modulated photoconductivity (MPC) measurements in order to extract information about the density of states (DOS) within the gap of defective semiconductors. Depending on the ...
Photoelectrochemical response and photoconductivity of poly(3-methylthiophene)
(Pergamon-elsevier Science LtdOxfordInglaterra, 1998)
Filmes finos de Zn(1-x)Cu(x)O crescidos por Spray Pirólise
(Universidade Federal de São CarlosUFSCarPrograma de Pós-graduação em FísicaCâmpus São Carlos, 2017-11-24)
This work consists of investigations of the structural, morphological and optical properties of thin films of the Zn(1-x)Cu(x)O system grown on glass substrate using the Spray-Pyrolysis technique with Zinc and Copper ...
Electron scattering and effects of sources of light on photoconductivity of SnO2 coatings prepared by sol-gel
(Elsevier B.V., 1999-05-01)
Electro-optical properties of sol-gel derived 2 mol% antimony or niobium doped tin dioxide films have been measured. The electron density has been calculated considering all the relevant scattering mechanisms and experimental ...
Contribution of oxygen related defects to the electronic transport in SnO2 sol-gel films
SnO2 deposited by sol-gel is a polycrystalline film with small grain size. Oxygen present at a less grain boundary traps electrons and then the depletion layer around the potential barrier of the grain boundary becomes ...