Physics: Recent submissions

Now showing items 81-100 of 247

Computational Study of I-V characteristics of ITO/Cu2 O/Metal junctions, Technical Session of Institute of Physics

Wijesinghe, W.M.P.L.; Siripala, W.; Jayasuriya, K.D.; Kalingamudali, S.R.D. (Processing of the Technical Session of Institute of Physics, 1999)

A theoretical model for current-voltage (I-V) characteristics of back-to-back diode systems was developed using the ideal diode equation. A computer model was developed using the language C++ to fit the experimental data ...
Methods for improving n-type photoconductivity Cu2O thin films

Kalubowila, K.D.R.N.; Gunawardena, L.K.A.D.D.S.; Wijesundera, R.P.; Siripala, W. (Semiconductor Science and Technology, 2014)

Electrodeposition technique is very useful for depositing n-type Cu2O thin films on various substrates. However, most of the reported n-type Cu2O thin film electrodes exhibit not only n-type photoactivity but also p-type ...
Observation of n-type Photoconductivty in Electrodeposited Copper Oxide Film Electrodes in a Photoelectrochemical cell

Siripala, W.; Jayakody, J.R.P. (Solar Energy Materials, 1986)

Copper oxide films were cathodically deposited on various metal substrates (Cu, Ti and Pt) using a basic solution of CuSO4, and it is found that they produce n-type photoconductivity in a photoelectrochemical cell. The ...
Study of Daytime Variation of Convective and Non-Convective Zones in Salt Pan Solar Ponds

Perera, P.A.A.; Amarasekara, C.D.; Jayakody, J.R.P.; Punyasena, M.A. (Annual Research Symposium, Faculty of Graduate Studies, University of Kelaniya, 2002)
Construction and Filling of a Large-area Deep-tank Solar Pond for Harnessing Solar Energy

Jayakody, J.R.P.; Punyasena, M.A.; Perera, P.A.A.; Amarasekara, C.D.; Kumarasinghe, M.A.S. (Annual Research Symposium, Faculty of Graduate Studies, University of Kelaniya, 2002)
Daytime Variation of Temperature and Salinity Profiles in Large-Area Saltpan Solar Ponds at Palavi, Sri Lanka

Perera, P.A.A.; Amarasekara, C.D.; Jayakody, J.R.P.; Punyasena, M.A. (Proceedings of the 18th Technical Session of the Institute of Physics - Sri Lanka, 2002)
Investigation of Temperature and Density Profiles of Brines in Evaporating Salt Pans at Palaviya in the North-Western Region of Sri Lanka

Hewageegana, P.S.; Amarasekara, C.D.; Jayakody, J.R.P.; Punyasena, M.A. (Proceedings of the 16th Technical Session of the Institute of Physics - Sri Lanka, 2001)
A Study of Wind Effects on Thermal Stability of Salt Pan Solar Ponds

Punyasena, M.A.; Amarasekara, C.D.; Jayakody, J.R.P.; Perera, P.A.A. (Annual Research Symposium, Faculty of Graduate Studies, University of Kelaniya, 2001)
A Study of Temperature and Salinity Variations with Depth in Salt Pans at Palavi in North-West Region of Sri Lanka

Hewageegana, P.S.; Amarasekara, C.D.; Jayakody, J.R.P.; Punyasena, M.A. (Annual Research Symposium, Faculty of Graduate Studies, University of Kelaniya, 2000)
A Home Made Double Slab Pyranometer for Irradiance Measurements

Punyasena, M.A.; Jayasuriya, K.D. (Proceedings of the 44th Technical Session of the Sri Lanka Association for the Advancement of Science (SLAAS), 1988)
Bound state solutions of the Manning-Rosen potential

Falaiye, B.J.; Oyewumi, K.J.; Ibrahim, T.T.; Punyasena, M.A.; Onate, C.A. (Canadian Journal of Physics, 2013)

Using the asymptotic iteration method (AIM), we have obtained analytical approximations to the ?-wave solutions of the Schr�dinger equation with the Manning?Rosen potential. The energy eigenvalues equation and the corresponding ...
Optimization of Thermal Insulation of a Small-scale Experimental Solar Pond

Jayatissa, N.W.K.; Attalage, R.; Hewageegana, P.S.; Perera, P.A.A.; Punyasena, M.A. (Sri Lankan Journal of Physics, 2012)

A small-scale experimental salinity-gradient solar pond, which will be utilized for the research and development in harnessing solar energy for desalination of seawater and generation of electricity, has been constructed. ...
Ammonium sulfide surface treatment of electrodeposited p-type cuprous oxide thin films

Jayathileke, K.M.D.C.; Kapaklis, V.; Siripala, W.; Jayanetti, J.K.D.S. (Electronic Materials Letters, 2014)

The effects of ammonium sulfide surface treatment on electrodeposited p-type polycrystalline cuprous oxide (Cu2O) thin films deposited on Ti substrates were studied. The structural and morphological properties of the films ...
Sulfidation of electrodeposited microcrystalline/nanocrystalline cuprous oxide thin films for solar energy applications

Jayathileke, K.M.D.C.; Kapaklis, V.; Siripala, W.; Jayanetti, J.K.D.S. (Semiconductor Science and Technology, 2012)

Grain size of polycrystalline semiconductor thin films in solar cells is optimized to enhance the efficiency of solar cells. This paper reports results on an investigation carried out on electrodeposited n-type cuprous ...
Observation of Defect Interface States at the Cu2O/CuxS Junction Using Thermally Stimulated IV Measurements.

Kalingamudali, S.R.D.; Siripala, W. (Sri Lankan Journal of Physics, 2001)

A simple method was developed to fabricate a Cu2O/CuxS p-n junction diode and I-V characteristics of the diode was measured at various temperatures. It was revealed that there are current transport mechanisms at the junction ...
Electrodeposition and Characterisation of CuInSe2 for applications in thin film solar cells

de Silva, K.T.L.; Priyantha, W.A.A.; Jayanetti, J.K.D.S.; Chithrani, B.D.; Siripala, W.; Blake, K.; Dharmadasa, I.M. (Thin Solid Films, 2001)

Copper indium diselenide (CuInSe2) layers have been grown at room temperature by electrochemical deposition technique in an aqueous medium. Resulting thin films have been characterised using XRD, XRF, XPS, GDOES and SEM ...
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 ...
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 ...
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 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 ...

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