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  1. No Access

    Chapter

    Charge Transport Study of OPV Polymers and Their Bulk Heterojunction Blends by Admittance Spectroscopy

    The measurement and understanding the conductivity/ mobility of an organic semiconductor is one of the most critical issues in organic electronics including organic solar cells. The standard “JV-approach” using s...

    Kevin K. H. Chan, Harrison K. H. Lee… in Progress in High-Efficient Solution Proces… (2015)

  2. No Access

    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. ...

    S. K. So, H. H. Fong, N. H. Cheung in MRS Online Proceedings Library (2011)

  3. No Access

    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...

    H.H. Fong, S.K. So in MRS Online Proceedings Library (2004)

  4. No Access

    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...

    H. L. Tam, R. Huber, K. F. Li, W. H. Wong, Y. B. Pun… in MRS Online Proceedings Library (2003)

  5. No Access

    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...

    H. H. Fong, W. J. Song, S. K. So in MRS Online Proceedings Library (2003)

  6. No Access

    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...

    H. H. Fong, K. C. Lun, S. K. So in MRS Online Proceedings Library (2002)

  7. No Access

    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...

    W. Song, S.K. So, L. Cao in Applied Physics A (2001)

  8. No Access

    Article

    Surface preparation and characterization of indium tin oxide substrates for organic electroluminescent devices

    S.K. So, W.K. Choi, C.H. Cheng, L.M. Leung, C.F. Kwong in Applied Physics A (1999)

  9. No Access

    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...

    S. K. So, M. H. Chan, K. T. Chan in MRS Online Proceedings Library (1995)

  10. No Access

    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...

    S. K. So, M. H. Chan, C. S. Hon, Louis M. Leung in MRS Online Proceedings Library (1995)

  11. No Access

    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...

    S. K. So, M. H. Chan, L. M. Leung in Applied Physics A (1995)

  12. No Access

    Chapter and Conference Paper

    Photophysics and Photochemistry of NO on Ag(111), Cu(111), and Si(111)7 × 7

    We have performed photon induced desorption (PID) from NO adsorbed on Ag(111), Cu(111), and Si(111)7 × 7 at 85 K in the wavelength region 250–800 nm by using Xe and Hg-Xe arc lamps in combination with a monoch...

    R. Franchy, S. K. So, Z. C. Ying, W. Ho in Desorption Induced by Electronic Transitio… (1990)

  13. No Access

    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...

    S. K. So, W. Ho in Applied Physics A (1988)