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Article
Growth and Characterization of Semicontinuous Metal Films by Pulsed Laser Ablation
Semicontinuous metals films of copper and gold were grown on different substrates by pulsed laser ablation. The resistance and transmittance of these growing metal films were monitored in situ vs film thickness. ...
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Article
Charge trap** and scattering by extrinsic gas dopants in tris(8-hydroxyquinoline) aluminum (Alq3)
The effects of various ambient gases (N2, O2, H2O) to the electron mobility of tris(8-hydroxyquinoline) aluminum, Alq3, were examined. For a clean Alq3, the electron transport is non-dispersive and essentially tr...
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Article
Hexagonal Lattice Photonic Crystal in Active Metallic Microcavity
A hexagonal lattice photonic crystal was fabricated inside the metallic microcavity. And a thin film of Alq3 was incorporated inside the textured cavity as an active medium. The microcavity is designed such th...
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Article
An angular dependent X-ray photoemission study of Indium-tin-oxide surfaces
The surface properties of indium-tin-oxide (ITO) thin films treated by UV ozone or plasma were analyzed by angular dependent X-ray photoelectron spectroscopy (ADXPS) and by ultraviolet photoemission (UPS). The...
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Article
Charge motion and trap** in molecularly doped hole transporters
The charge transporting properties of N, N’-dipheny l-N, N’-bis(3-methylphenyl)-(1,1’-biphenyl)-4,4’-diamine (TPD), TPD doped with 5,6,11,12- tetraphenylnaphthacene (rubrene), and TPD doped with 4-(dicyanomethyle...
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Article
Angular-dependent photoemission studies of indium tin oxide surfaces
Indium tin oxide (ITO) surfaces were treated by solvent cleaning, by plasma of oxygen, argon, nitrogen and by argon ion (Ar+) sputtering. Angular-dependent X-ray photoelectron spectroscopy (ADXPS) and ultraviolet...
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Article
Surface preparation and characterization of indium tin oxide substrates for organic electroluminescent devices
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Article
Optical Absorptions and EL2-Like Defects in Low Temperature Grown Molecular-Beam-Epitaxial GaAs
The optical absorptions and the defect densities of GaAs grown by low temperature molecular-beam-epitaxy at growth temperatures between 200-580 °C were evaluated by photothermal deflection spectroscopy. The sh...
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Article
Optical Degradation of Poly (P-Phenylene Vinylene)
The influence of laser irradiation on an electroluminescent polymer, poly (2,5-di-n-hexyloxy-1,4-phenylene vinylene) is studied. Photoluminescence, infrared spectroscopy, and photothermal deflection spectrosco...
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Article
Photothermal deflection spectroscopy of polymer thin films
Photothermal Deflection Spectroscopy (PDS) is known to be one of the most sensitive techniques for measuring the absorption of weakly absorbing materials. We have applied PDS for measuring the optical absorpti...
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Article
Photon-induced reactions of No adsorbed on GaAs(110)
The interaction of cw laser radiation with NO adsorbed on GaAs(110) at 90 K has been studied over a wide range of wavelengths from 457 to 900 nm by high resolution electron energy loss spectroscopy (HREELS), t...