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Browsing Physics by Title

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  • Ozone production using pulsed dielectric barrier discharge in oxygen 
    Samaranayake, W.J.M.; Miyahara, Y.; Namihira, T.; Katsuki, S.; Hackam, R.; Akiyama, H. (IEEE Transactions on Dielectrics and Electrical Insulation, 2000)
    The production of ozone was investigated using a dielectric barrier discharge in oxygen, and employing short-duration pulsed power. The dependence of the ozone concentration (parts per million, ppm) and ozone production ...
  • Ozone synthesis in a cylindrical dry air-fed ozonizer by non thermal gas discharges 
    Samaranayake, W.J.M.; Hackam, R.; Akiyama, H. (2003)
    Ozone is increasingly being used as an alternative oxidant to chlorination processes in various industrial applications without any objectionable by products to the environment and requiring less energy for its production. ...
  • Ozone synthesis in oxygen using a pulsed discharge 
    Samaranayake, W.J.M.; Hackam, R.; Akiyama, H. (2001)
    Ozone is a strong oxidizing and bleaching agent, which makes it a potent germicide, viricide and bactericide. Therefore, ozone can be used as an alternative to chlorination processes with low energy consumption and without ...
  • Pedestrian and vehicular traffic friendly uninterrupted solar powered traffic signal light system 
    Kalingamudali, S.R.D.; Harambearachchi, J.C.; Kumara, L.S.R.; de Silva, J.H.S.R.; Piumwardena, D.D.F.; de Silva, L.D.L.; Abeynanda, L.T.; Chameera, K.H.G.G.; Dissanayake, D.P.; Attenayake, A.M.C.R.; Molligoda, S.A.G.N. (2006)
    During power failures and power cuts road users suffer immense difficulties due to non-availability of traffic signal lights all over the world. Use of solar cells with lead acid accumulators to provide required power and ...
  • Pentacene acoustic charge transfer devices 
    Kalingamudali, S.R.D.; Shao, H.; Woods, R.C.; Neelam, R.; Singh, V. (2011)
    Acoustic charge transfer (ACT) devices use a charge transfer channel formed from a thin-film of the organic semiconductor pentacene deposited on the surfaces of either LiNbO(3) 0r Bi(12)GeO(20)substrates. Organic semiconductor ...
  • 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. ...
  • Photocurrent enhancement of electrodeposited Cl doped cuprous oxide thin films on Ti substrates by annealing 
    Jayathileka, K.M.D.C.; Kapaklis, V.; Siripala, W.; Jayanetti, J.K.D.S. (Sri Lanka Association for the Advancement of Science, 2012)
  • Photoelectrochemical Characterisation of ZnSe coated Copper Indium Sulphide Thin Film Electrodes 
    Wijesundera, R.P.; Siripala, W.; Jayasuriya, K.D.; Kalingamudali, S.R.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S. (1999)
    Capper Indium Sulphide thin films were prepared by sulphidation of Cu-In alloy on Ti substrate. Cu-In alloy was potentiostatically electrodeposited at ~1.4 V Vs SCE in an aqueous bath containing 5 mM CuCl2) 37.5m1 InCl3,1% ...
  • Photoelectrochemical Hydrogen Production Using New Combinatorial Chemistry Derived Materials 
    Baeck Sung-Hyeon; Choi Kyoung-Shin; Ivanovskaya, A.; Jaramillo, T.F.; Siripala, W.; Stucky, G.; McFarland, E.W. (2002)
    The overall project objective is the development and application of combinatorial methods to discover an efficient, practical, and economically sensible material for photoelectrochemical production of hydrogen from water ...
  • Photoelectrolysis of water using double-semiconductor electrodes 
    Wijesundera, R.P.; Siripala, W. (2003)
    Production of hydrogen by splitting water using solar energy is an attractive method to store solar energy as chemical energy. Semiconductor material cuprous oxide (Cu20) is a candidate material for this because it possesses ...
  • Photoluminescence characterization of polycrystalline n-type Cu2O films 
    Garuthara, R.; Siripala, W. (Journal of Luminescence, 2006)
    Electrodeposition was used to deposit Cu2O thin films on ITO substrates. Photoresponse of the film clearly indicated n-type behavior of Cu2O in photoelectrochemical cells. The temperature dependence of photoluminescence ...
  • Photovolatic properties of Cu2O/CuxS heterojunction 
    Siripala W; Kumara K P (Journal of the National Science Council, Sri Lanka, 1990)
    A simple electrochemical method was developed to fabricate a Cu2O/CuxS heterojunction and it was then used in preparing a thin film photovoltaic soar cell. Cu2O was prepared by the method of electrodeposition and CuxS was ...
  • Plantain Pith Battery Powered Lighting System 
    Kumara, K.S.J.; Wijesundera, R.P.; Jayasuriya, K.D. (Institute of Physics, Sri Lanka, 2015)
  • Plasmonic enhancing nanoantennas for photodetection 
    Hewageegana, P.; Stockman, M.I. (Infrared Physics & Technology, 2007)
    This paper discusses the use of plasmonic nanostructured systems as nanoantennas for photodetection. Even though semiconductors and their heterostructures have many useful properties and widely used in photodetection, 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 ...
  • Preparation of CuInS2 thin films by electrodeposition and sulphurisation for applications in solar cells 
    Wijesundera, R.P.; Siripala, W. (Solar Energy Materials and Solar Cells, 2004)
    Thin films of copper indium disulphide (CuInS2) were grown on Ti substrates by sulpherisation of Cu?In precursors prepared by sequentially electrodeposited Cu and In layers. CuInS2 films were characterised using X-ray ...
  • Pulsed power production of ozone in O2/N2 in a coaxial reactor without dielectric layer 
    Samaranayake, W.J.M.; Miyahara, Y.; Namihira, T.; Katsuki, S.; Hackam, R.; Akiyama, H. (IEEE Transactions on Dielectrics and Electrical Insulation, 2001)
    Very short duration pulsed streamer discharges have been used to produce ozone in a gas mixture of nitrogen and oxygen at atmospheric pressure. The ratio of nitrogen to oxygen in the mixture was varied in the range from ...
  • Pulsed power production of ozone using nonthermal gas discharges 
    Samaranayake, W.J.M.; Miyahar, Y.; Namihira, T.; Katsuki, S.; Sakugawa, T.; Hackam, R.; Akiyama, H. (IEEE Transactions on Dielectrics and Electrical Insulation, 2001)
    This paper discusses ozone synthesis by employing a short duration (?120 ns) of pulsed power and using positive voltages in dry air and in oxygen, with and without a dielectric barrier. Ozone concentration and ozone ...
  • Pulsed streamer discharge characteristics of ozone production in dry air 
    Samaranayake, W.J.M.; Miyahara, Y.; Namihira, T.; Katsuki, S.; Sakugawa, T.; Hackam, R.; Akiyama, H. (IEEE Transactions on Dielectrics and Electrical Insulation, 2000)
    Experimental investigation of HV short pulsed streamer discharges in dry air-fed ozonizers under various operating conditions are reported. Ozone concentration, energy input and ozone production yield (efficiency) were ...
  • A quantum dot in topological insulator nanofilm 
    Herath, T.M.; Hewageegana, P.; Apalkov, V. (2014)

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