Buscar
Mostrando ítems 21-30 de 3208
Microstructure, dielectric properties and optical band gap control on the photoluminescence behavior of Ba[Zr0.25Ti0.75]O-3 thin films
(Springer, 2009-01-01)
Ba[Zr0.25Ti0.75]O-3 (BZT) thin films were synthesized by the complex polymerization method and heat treated at 400 A degrees C for different times and at 700 A degrees C for 2 h. These thin films were analyzed by X-ray ...
Band gap engineering by anion doping in the photocatalyst BiTaO4: First principle calculations
(2012)
We have shown the effect of mono and co-doping of non-metallic anion atoms on the electronic structure in BiTaO4 using the first-principles method. It can improve the photocatalytic efficiency for hydrogen production in ...
Algoritmos de aprendizaje de máquinas para la predicción de Band GAPS en paneles tipo sándwich
(Universidad de Chile, 2022)
Los band gaps corresponden a rangos de frecuencia para los cuales un material celular bloquea la propagación de ondas mecánicas, esta propiedad también puede ser exhibida por paneles tipo sándwich y sus características: ...
On the use of the whole eigenvalue spectrum to obtain single molecule band structures and solid band gaps for molecular electronics studies
(SOCIEDAD CHILENA DE QUIMICA, 2006-06)
A Density Functional microscopic model of C-60, consisting of seven molecular orbitals (3 occupied and 4 empty), was employed to get the best values for the half-width and the scanning distance of the mathematical function ...
Band-edge states of the zero(th)-order gap in quasi-periodic photonic superlattices
(Spie - Int Soc Optical Engineering, 2008-01-01)
The photonic modes of Thue-Morse and Fibonacci lattices with generating layers A and B, of positive and negative indices of refraction, are calculated by the transfer-matrix technique. For Thue-Morse lattices, as well for ...
Band-edge states of the zero(th)-order gap in quasi-periodic photonic superlattices
(Spie - Int Soc Optical Engineering, 2008-01-01)
The photonic modes of Thue-Morse and Fibonacci lattices with generating layers A and B, of positive and negative indices of refraction, are calculated by the transfer-matrix technique. For Thue-Morse lattices, as well for ...
Optical and reduced band gap in n- and p-type GaN and AlN
(2002-09)
We present a full band calculation of the doping-induced energy shifts of the conduction-band minimum and the valence-band maximum for n- and p-type GaN and AlN. Both wurtzite and zinc-blende structures have been considered. ...
Anomalous Temperature Dependence of the Band Gap in Black Phosphorus
(2016-08-10)
Black phosphorus (BP) has gained renewed attention due to its singular anisotropic electronic and optical properties that might be exploited for a wide range of technological applications. In this respect, the thermal ...
Non-Bragg band gaps in 1D metamaterial aperiodic multilayers
(European Optical Soc, 2007-12)
We investigate the existence of non-Bragg band gaps in 1D aperiodic photonic structures, namely the Fibonacci and Thue-Morse lattices combining ordinary positive index materials and dispersive metamaterials. Both structures ...