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Urbach energy parameter of flash evaporated amorphous gallium arsenide films
(2002-04-01)
The dependence of the optical absorption edge on the deposition crucible temperature is used to investigate the electronic states in As-rich a-GaAs flash evaporated films. The Urbach energy parameter, determined from ...
Thickness dependence of structure and piezoelectric properties at nanoscale of polycrystalline PZT thin films
(2012-10-31)
Lead zirconate titanate Pb(Zr 0.50Ti 0.50)O 3 (PZT) thin films were deposited by a polymeric chemical method on Pt(111)/Ti/SiO2/Si substrates to understand the mechanisms of phase transformations and the effect of film ...
Synthesis of Transparent Semiconducting Metal-oxides via Polymeric Precursor Route for Application in Thin-film Field-Effect Transistors
(2016-01-01)
Solution-processed zinc oxide (ZnO) thin-film transistors (TFTs) obtained via hydrolysis/pyrolysis of an organic precursor present an excellent technique to obtain high performance electronic devices with low manufacturing ...
On the UV-light-induced Desorption/Adsorption Mechanism of Atmospheric Species in Solution-processed Zinc Oxide Thin Films
(2019-01-01)
Zinc oxide (ZnO) is a n-type transparent semiconductor which can be processed by low cost techniques (such as spray-pyrolysis and spin-coating) and can be applied as the active layer of thin-films transistors (TFTs). The ...
Fabrication and characterization of GeO2-PbO optical waveguides
(2009-12-01)
This work presents studies of GeO2-PbO thin films deposited by RF Sputtering for fabrication of rib-waveguide. GeO2-PbO vitreous targets were prepared melting the reagents in alumina crucible. Thin films were deposited at ...
On the nucleation of GaP/GaAs and the effect of buried stress fields
(2006-08-23)
We have recently shown that spatial ordering for epitaxially grown InP dots can be obtained using the periodic stress field of compositional modulation on the InGaP buffer layer. The aim of this present work is to study ...
Reducing the electrical resistance of films of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate).
(Associação Brasileira de PolímerosPorto de Galinhas, 2014-10-12)
Semi-conductive polymer thin films were prepared from solutions of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT/PSS) by spin coating. A commercial solution of PEDOT/PSS was submitted to different modification ...
Active control in flexible plates with piezoelectric actuators using linear matrix inequalities
(2006-12-01)
The study of algorithms for active vibrations control in flexible structures became an area of enormous interest, mainly due to the countless demands of an optimal performance of mechanical systems as aircraft, aerospace ...