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Browsing Physics by Issue Date

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  • Spectral responses of electrodeposited cuprous oxide thin film electrodes 
    Siripala W (Journal of the National Science Council of Sri Lanka, 1995)
    Photoresponse of the electrodeposited cuprous oxide thin film electrodes were investigated in a photoelectrochemical cell. Spectral response measurements reveal that a Schottky-type junction is formed at the junction between ...
  • Spectral responses of electrodeposited cuprous oxide thin film electrodes 
    Siripala, W. (Natural Resources, Energy and Science Authority of Sri Lanka, 1995)
  • New Experimental Interpretation for the Emitter-size Effect of AIGaAs/GaAs heterojunction bipolar transistors. 
    Kalingamudali, S.R.D.; Woods, R.C.; Wismayer, A.C. (1995)
    AIGaAs/GaAs heterojunction bipolar transistors (HBTs) have an excellent frequency performance. One of the major limitations of these devices is current gain degradation with decreased emitter-base junction size, which is ...
  • Study of Annealing Effects of Cuprous Oxide Grown by Electrodepostion Technique 
    Siripala, W.; Perera, L.D.R.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S.; Dharmadasa, I.M. (Solar Energy Materials and Solar Cells, 1996)
    Low temperature electrochemical deposition of cuprous oxide from aqueous solutions has been investigated. X-ray diffraction, scanning electron microscopy, optical absorption, and photo-response of liquid/cuprous oxide ...
  • Novel LISICON mixed conductors, Li4 ? 2xCoxGeO4 
    Sumathipala, H.H.; Dissanayake, M.A.K.L.; West, A.R. (Solid State Ionics, 1996)
    A novel LISICON type ? solid solution range has been found in the system Li4 ? 2xCoxGeO4 for 0.15 ? x ? 0.8. The highest net conductivity, 8.4 ? 10?6Scm?1, was observed for x = 0.25 at 27 �C rising to 3.35 ? 10?3Scm?1 at ...
  • Type Conversion of Electrodeposited Cuprous Oxide 
    Perera, L.D.R.D.; de Silva, K.T.L.; Siripala, W.; Jayanetti, J.K.D.S. (1996)
    Cuprous oxide is an inexpensive and non-toxic semiconductor material having a direct band gap of 2.0 eV. In view of its possible applications in low-cost solar energy converting devices thin films were fabricated and their ...
  • Potentiostatic electrodeposition of cuprous oxide thin films 
    Perera, L.D.R.D.; Siripala, W.; de Silva, K.T.L. (Journal of the National Science Council of Sri Lanka, 1996)
    Current-potential scans were used to investigate the electrodeposition of coprous oxide thin films in an acetate bath. We found that a narrow potential domain, from OV vs SCE, is available for the potentiostatic electrodeposition ...
  • Study of annealing effects of cuprous oxide grown by electrodeposition technique 
    Siripala, W.; Perera, L.D.R.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S.; Dharmadasa, I.M. (Solar Energy Materials and Solar Cells, 1996)
    Low temperature electrochemical deposition of cuprous oxide from aqueous solutions has been investigated. X-ray diffraction, scanning electron microscopy, optical absorption, and photo-response of liquid/cuprous oxide ...
  • IV characteristics of ITO/Cu2O/ metal junctions 
    Perera, L.D.R.D.; Siripala, W.; Kalingamudali, S.R.D.; Jayanetti, J.K.D.S.; de Silva, K.T.L. (1996)
    Cuprous oxide is an inexpensive and non-toxic semiconductor material having the potential for use in low-cost photovoltaic devices. Electrodeposition is a low-cost method t0 produce thin Cu2O films and electrodeposited ...
  • Growth and Characterization of Copper Indium Diselenide 
    Chithrani, B.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S.; Siripala, W. (Proceedings of the Technical Session of Institute of Physics, Sri Lanka, 1996)
    CuInSe2 thin films were prepared on Ti plates by electrodeposition from an aqueous solution containing CuCl2, InCl3 and SeO2. The deposition was carried out at -0.5V Vs SCE. X-ray diffraction and Scanning electron microscopy ...
  • ITO/n-Cu2O/p-CuxS Thin Film Solar Cell 
    Perera, L.D.R.D.; Wijesundera, R.P.; Siripala, W.; Jayasuriya, K.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S. (Sri Lanka Association for the Advancement of Science, 1997)
  • ITO/ u-Cu2O/ p-Cu2S thin film solar cell 
    Perera, L.D.R.D.; Wijesundara, R.; Jayasuriya, K.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S. (Srilanka association for the advancement od science proceedings of 53rd Anuual Session., 1997)
  • Surface States at CuInSe2/Aqueous Electrolyte Interface 
    Siripala W (Journal of Science of the University of Kelaniya Sri Lanka, 1997)
    Impedance measurements were used to evaluate the relative band edge positions of single crystal p-CuInSej electrodes in aqueous 0.1M IQS04 solution by measuring die extrapolated flat-band potentials, Vf t . We find ...
  • Gamow-Teller Strength from the 76Se(n,p)76As Reaction: Implication for the Double Beta Decay of 76Ge 
    Helmer, R.L.; Punyasena, M.A.; Abegg, R.; Alford, W.P.; Celler, A.; El-Kateb, S.; Engle, J.; Frekers, D.; Henderson, R.S.; Jackson, K.P.; Long, S.; Miller, C.A.; Olsen, W.C.; Spicer, B.M.; Trudel, A.; Vetterli, M.C. (Physical Review C, 1997)
    Cross sections have been measured up to 35 MeV excitation for the 76Se(n,p)76As reaction at five laboratory angles between 0� and 15�. The incident neutron energy was 198 MeV. The distribution of Gamow-Teller (GT) strength ...
  • Perimeter and bulk recombination currents in GaAs homojunction diodes and heterojunction bipolar transistors after surface processing 
    Kalingamudali, S.R.D.; Wismayer, A.C.; Woods, R.C.; Wight, D.R. (Solid State Electronics, 1997)
    The emitter-mesa surface (perimeter) and emitter-base bulk recombination currents, in heterojunction bipolar transistors (HBTs), are known to degrade device performance at low applied voltages, where these currents dominate. ...
  • Construction of a Near Ideal Nanoammeter 
    Wijesundera, R.P.; Kalingamudali, S.R.D.; Jayasuriya, K.D. (1998)
    A near ideal ac/dc nanoammeter was constructed using two operational amplifiers (op-amp) and a voltmeter. Small currents were converted into a voltage by the first op-amp and this was amplified into a larger voltage by ...
  • Investigation of the 12C(p,d,pi+)11B Reaction in the Quasifree Region 
    Benjamintz, M.; Falk, W.R.; Auld, E.G.; Campbell, J.R.; Green, A.; Korkmaz, E.; Ling, A.G.; Punyasena, M.A.; Roos, P.G.; Walden, P.L.; Yen, S. (Physical Review C, 1998)
    12C(p? ,d?+)11B has been investigated in the quasifree region at energies of 370 and 500 MeV. For each energy, measurements were made at the four angle combinations of (?d,left,??,right) equal to (15�, 30�), (15�, 55�), ...
  • Study of Sulphidation of Electrodeposited Cu2O Thin Films for Solar Cell Applications 
    Siripala, W.; Wijesundera, R.P.; Perera, L.D.R.D.; Jayasuriya, K.D. (1998)
    Cuprous oxide (Cu20 ) layers were potentiostatically electrodeposited on glass/ITO substrates and then they were partially sulphided using Na2S and H2S. Resulting layers were used to fabricate ITO/n-Cu20/p-CuxS thin film ...
  • Ozone production using cylindrical reactors with and without solid dielectric layers in dry air 
    Samaranayake, W.J.M.; Miyahara, Y.; Namihira, T.; Katsuki, S.; Hackam, R.; Akiyama, H. (1999)
    An investigation into ozone production in dry air-fed ozonizers under different operating gas discharge conditions at a pressure of 1.01?105 Pa using a spiral wire made to a cylindrical configuration is reported. A magnetic ...
  • Optical Design and Performance of the SASP Spectormeter at TRIUMF 
    Walden, P.L.; Walton, T.G.; Miller, C.A.; Yen, S.; Abegg, R.; Auld, E.G.; Campbell, J.R.; Chakhalyan, J.; Churchman, R.; Duncan, F.; Falk, W.R.; Frekers, D.; Green, A.; Green, P.E.W.; Hartig, M.; Hausser, O.; Haddock, C.; Hicks, K.; Hutccheon, D.; Jones, G.; Korkmaz, Y.Ke.E.J.; Khan, N.; Ling, A.; Lobb, D.E.; Naqvi, S.I.H.; Olsen, W.C.; Opper, A.; Otter, A.; Punyasena, M.A.; Reeve, P.; Zhao, J. (Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1999)
    A new Q?Q-Clamshell magnetic spectrometer called SASP has been commissioned in the proton hall at TRIUMF. The principal optical characteristics are: a solid angle acceptance of 13.5 msr, a momentum bite of 25%, a momentum ...

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