Now showing items 1-10 of 192
Photoconductivity for silver nitrate in nanostructured sol-gel materials
(Journal of Nanoscience and Nanotechnology, 2013-01-16)
Photoconductivity excitation spectrum for stretch-oriented PPV
(Elsevier B.V., 2005-09-22)
We have obtained the photoconductivity (PC) excitation spectrum for a stretch-oriented poly(paraphenylene vinylene) film over a wide spectral range (up to 5 eV). The measurements were performed in the surface cell configuration ...
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 ...
Determination of the hydrogenated amorphous silicon density of states parameters from photoconductivity measurements
(Natl Inst Optoelectronics, 2009-12)
In this paper, after a short recall of the information that can be extracted from different experiments based on the photoconductivity properties of a semiconductor, we present experimental results obtained on a thin film ...
Vertical versus planar pulsed photoconductive antennas that emit in the terahertz regime
The design process of a photoconductive antenna (PCA), which emits efficiently in the electromagnetic terahertz range, demands some considerations that are discussed through this work. In this work, several essential ...
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 ...
Photoconductivity Measurements in Nanostructured ZnO and ZnO:Al Films
ZnO is a versatile material used in numerous applications, such as antireflective coatings, transparent electrodes for solar cells, gas sensors, varistors and electro and photoluminescent devices. One of the most important ...
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 ...