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Item Electrocatalytic activity of nanocubic and microcrystalline Cu2O electrodes for glucose oxidation(Sri Lanka Association for the Advancement of Science, 2016) Jayasinghe, J.L.K.; Jayathilaka, K.M.D.C.; Kaumal, M.N.; Dissanayake, D.P.; Jayanetti, J.K.D.S.Item Effect of temperature on photosensitivity of electrodeposited n-Cu2O/p-CuxS thin film junctions(Faculty of Science, University of Kelaniya, Sri Lanka, 2016) Madusanka, H.D.P.; Kalubowila, K.D.R.N.; Jayathilaka, K.M.D.C.; Jayanetti, J.K.D.S.The purpose of this study was the construction of a standalone microcontroller based ambient light sensing device to interface an ambient light sensor with a temperature correction and to study the effects of temperature on photosensitivity of electrodeposited Cu2O based thin film p-n junction diodes. Environmentally friendly, low cost, nontoxic cuprous oxides have highly acceptable electrical and optical properties. It has a direct energy gap of about 2 eV at room temperature and has a good absorption coefficient. Cuprous oxide has a good mobility for the majority carriers and a diffusion length of the minority carriers is several micrometers. In this study, an electrolytic solution of 0.1M sodium acetate and 0.01M cupric acetate was used to fabricate Cu2O thin films on top of Ti substrates using electrodeposition. Electrodeposition was carried out potentiostatically at a potential of -200 mV with respect to the saturated calomel electrode. A Na2S solution was used to make the n- Cu2O/p-CuxS junction. In order to increase the photocurrent from the fabricated n- Cu2O/p-CuxS junction, the sulphided Cu2O sample was exposed to ammonium sulphide gas. Then the photocurrent of the n-Cu2O/p-CuxS thin film junction was measured by a constructed microcontroller based light sensing device simultaneously monitoring the intensity of light with a luminance meter HS1010. An important observation made in this study was that the photocurrent of the electrodeposited Cu2O/CuxS thin film junctions depended greatly on the variation of temperature during exposure to light. Thus the junction photocurrent was studied by exposing the junctions to light while monitoring the variation in the photocurrent with the temperature using a DS18B20 temperature sensor. The resulting data were plotted using MATLAB software and it was found that the photocurrent of the thin film p-n junction displayed a variation that was very much linear at low intensities of light. The measured output currents obtained from the p-n junctions and the output values obtained from the temperature sensor were used to display the intensity of light with the temperature correction using an electronic circuit.Item Surface treatment of electrodeposited n-type Cu2O thin films for applications in Cu2O based devices(2014) Jayathilaka, K.M.D.C.; Kapaklis, V.; Siripala, W.; Jayanetti, J.K.D.S.Item Electrodeposited chlorine doped cuprous oxide thin films for gas sensing applications(Sri Lanka Association for the Advancement of Science, 2013) Bandara, K.N.D.; Jayathileka, K.M.D.C.; Dissanayake, D.P.; Siripala, W.; Jayanetti, J.K.D.S.Item Enhancement of the photovoltaic conversion efficiency of electrodeposited p-n homojunction cuprous oxide solar cells by surface passivation(Sri Lanka Association for the Advancement of Science, 2013) Jayathileka, K.M.D.C.; Kapaklis, V.; Siripala, W.; Jayanetti, J.K.D.S.Item Fabrication and characterization of electrodeposited CuO/Cu2O heterojunction solar cells(Sri Lanka Association for the Advancement of Science, 2013) Jayathileka, K.M.D.C.; Kapaklis, V.; Siripala, W.; Jayanetti, J.K.D.S.Item Photocurrent enhancement of electrodeposited Cl doped cuprous oxide thin films on Ti substrates by annealing(Sri Lanka Association for the Advancement of Science, 2012) Jayathileka, K.M.D.C.; Kapaklis, V.; Siripala, W.; Jayanetti, J.K.D.S.Item Electrodeposited nano-crystalline cuprous oxide thin films for gas sensing applications(Sri Lanka Association for the Advancement of Science, 2012) Bandara, K.N.D.; Jayathileka, K.M.D.C.; Siripala, W.; Dissanayake, D.P.; Jayanetti, J.K.D.S.Item ITO/n-Cu2O/p-CuxS Thin Film Solar Cell(Sri Lanka Association for the Advancement of Science, 1997) Perera, L.D.R.D.; Wijesundera, R.P.; Siripala, W.; Jayasuriya, K.D.; de Silva, K.T.L.; Jayanetti, J.K.D.S.Item Construction of Cu2O Thin Film based Light Detector(Proc. 28th Technical Sess. of Institute of Physics, Sri Lanka, 2012) Kalubowila, K.D.R.N.; Jayathilaka, K.M.D.S.; Siripala, W.; Jayanetti, J.K.D.S.
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