Faculty of Science: Recent submissions

Now showing items 341-360 of 655

Effect of Interface Modifiers on Hole Mobility in Hybrid Nanoporous Titanium dioxide (TiO2) / Poly(3-hexylthiophene) (P3HT) Solar Cells

Prashanthan, K.; Thivakarasarma, T.; Balashankar, K.; Ravirajan, P. (University of Jaffna, 2015)

This study focuses on influence of interface modifiers on hole mobility in Hybrid Nanoporous Titanium dioxide (TiO2) / Poly(3-hexylthiophene) (P3HT) nanocomposite by using time of flight technique. We found that the ...
The Effect of Polymer Optoelectronic Properties on the Performance of Multilayer Hybrid Polymer / TiO2 Solar Cells

Ravirajan, P.; Haque, S.A.; Durrant, J.R.; Bradley, D.D.C.; Nelson, J. (University of Jaffna, 2005)
Cost Effective Solvothermal Method to Synthesize Zn-Doped TiO2 Nanomaterials for Photovoltaic and Photocatalytic Degradation Applications

Rajaramanan, T.; Shanmugaratnam, S.; Gurunanthanan, V.; Yohi, S.; Velauthapillai, D.; Ravirajan, P.; Senthilnanthanan, M. (University of Jaffna, 2021)

Titanium dioxide (TiO2 ) is a commonly used wide bandgap semiconductor material for energy and environmental applications. Although it is a promising candidate for photovoltaic and photocatalytic applications, its overall ...
Cadmium sulfide interface layer for improving the performance of titanium dioxide/poly (3-hexylthiophene) solar cells by extending the spectral response

Thanihaichelvan, M.; Sockiah, K.; Balashangar, K.; Ravirajan, P. (University of Jaffna, 2015)

This work focused on studying the effect of cadmium sulfide (CdS) interfacial layer on the performance of titanium dioxide (TiO2)/poly (3-hexylthiophene) (P3HT) solar cells and finding out its effect on charge recombinat ...
Controlling recombination kinetics of hybrid poly-3- hexylthiophene (P3HT)/titanium dioxide solar cells by self assembled monolayer

Loheeswaran, S.; Thanihaichelvan, M.; Ravirajan, P.; Nelson, J. (University of Jaffna, 2016)

Self-assembled monolayers (SAMs) of benzoic acid based molecules are used to modify the metal oxide– polymer interface in a hybrid poly-3-hexylthiophene (P3HT)/TiO2 photovoltaic device structure. The effect of SAMs on ...
Polymer/Fullerene Blend Solar Cells with Cadmium Sulfide Thin Film as an Alternative Hole-Blocking Layer

Thanihaichelvan, M.; Loheeswaran, S.; Balashangar, K.; Velauthapillai, D.; Ravirajan, P. (University of Jaffna, 2019)

In this work, chemical bath-deposited cadmium sulfide (CdS) thin films were employed as an alternative hole-blocking layer for inverted poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) bulk ...
Enhanced Performance of Nanoporous Titanium Dioxide Solar Cells Using Cadmium Sulfide and Poly(3-hexylthiophene) Co-Sensitizers

Thanihaichelvan, M.; Kodikara, M.M.P.S.; Ravirajan, P.; Velauthapillai, D. (University of Jaffna, 2017)

This work reports the effect of co-sensitization of nanoporous titanium dioxide using Cadmium Sulfide (CdS) and poly(3-hexylthiophene) (P3HT) on the performance of hybrid solar cells. CdS nanolayer with different thicknesses ...
Selective and electronic detection of COVID-19 (Coronavirus) using carbon nanotube field effect transistor-based biosensor: A proof-of concept study

Thanihaichelvan, M.; Surendran, S.N.; Kumanan, T.; Sutharsini, U.; Ravirajan, P.; Valluvan, R.; Tharsika, T. (University of Jaffna, 2021)

In this work, we propose and demonstrate a carbon nanotube (CNT) field-effect transistor (FET) based biosensor for selective detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). CNT FETs were fabricated ...
Structural and photoelectrochemical characterization of heterostructured carbon sheet/Ag2MoO4-SnS/Pt photocapacitor

Kajana, T.; Velauthapillai, D.; Shivatharsiny, Y.; Ravirajan, P.; Yuvapragasam, A.; Senthilnanthanan, M. (University of Jaffna, 2020)

Photocapacitors can harvest solar energy and store it in the form of electrical energy and are expected to solve the problem of unstable power output of solar cells under fluctuating sunlight. In the present study, a ...
Solid state solar cell made from nanocrystalline TiO 2 with a fluorene-thiophene copolymer as a hole-conductor

Ravirajan, P.; Haque, S. A.; Poplavskyy, D.; Durrant, J. R.; Bradley, D.D.C.; Nelson, J. (University of Jaffna, 2004)

We study the charge recombination kinetics and photovoltaic performance of composites of poly (9,9-dioctylfluorene co-bithiophene) polymer with nanocrystalline TiO2. Transient optical spectroscopy confirms that photoexciation ...
Controlling recombination kinetics of hybrid nanocrystalline titanium dioxide/polymer solar cells by inserting an alumina layer at the interface

Loheeswaran, S.; Balashangar, K.; Jevirshan, J.; Ravirajan, P. (University of Jaffna, 2013)
SnS2/TiO2 Nanocomposites for Hydrogen Production and Photodegradation under Extended Solar Irradiation

Shanmugaratnam, S.; Selvaratnam, B.; Baride, A.; Koodali, R.; Ravirajan, P.; Velauthapillai, D; Shivatharsiny, Y. (University of Jaffna, 2021)

Earth–abundant transition metal chalcogenide materials are of great research interest for energy production and environmental remediation, as they exhibit better photocatalytic activity due to their suitable electronic and ...
Perovskite Solar Cells: A Porous Graphitic Carbon based Hole Transporter/Counter Electrode Material Extracted from an Invasive Plant Species Eichhornia Crassipes

Pitchaiya, S.; Eswaramoorthy, N.; Natarajan, M.; Santhanam, A.; Asokan, V.; Ramakrishnan, V.M.; Rangasamy, B.; Sundaram, S.; Ravirajan, P.; Velauthapilla, D. (University of Jaffna, 2010)
Effect of Temperature and Light Intensity on the Performance of PolymerFullerene Solar Cells with Titanium Dioxide Nanolayers

Sarathchandran, S.; Haridas, K.; Kim, Y.; Ravirajan, P. (University of Jaffna, 2010)

n this work, alternative architecture for polymer/fullerene solar cells has been explored using titanium dioxide nanolayers which invert the polarity of the cell and may relax the necessity to have a hole-collecting buffer ...
Role of Poly(Ethylenedioxythiophene)/Poly(Styrene Sulphonate) on the Performance of Nanocrystalline Titanium Dioxide/Poly(3-Hexylthiophene) Polymer Solar Cells

Sarathchandran, S.; Prashanthan, K.; Ravirajan, P. (University of Jaffna, 2011)

Hybrid nanocrystalline titanium dioxide (TiO2)/polymer solar cells draw intense interest due to the potential advantages of nanocrystalline TiO2. The poly(styrenesulfonate)-doped poly(ethylenedioxy thiophene) (PEDOT:PSS) ...
Quantitative Analysis Of Trace Metal In Water And Soft Tissues Of Balanus Amphitrite In Nandikadal Lagoon, Sri Lanka

Sivashanthini, K.; Dilini Jayaweera, D.; Shivatharshini, Y.; Gunaalan, K. (International Conference on Research in Science Engineering and Technology, 2019)

Due to long-term military activities carried out in Nandikadal lagoon situated at Mullaitivu, Sri Lanka, there are high possibilities to impact water and biota with heavy metals .Balanus amphitrite( Barnacles )has been ...
Application Of Water Quality Index For Groundwater Quality Assessment In Chunnakam And Jaffna Town

Harshan, S.; Gunatilake, J.; Thushyanthy, M.; Srivaratharasan, T.; Gunaalan, K. (2016)

Jaffna peninsula is completely dependent on groundwater resources for all its needs. The quality of groundwater has been progressively declining largely due to sea water intrusion - salinity development and inorganic ...
Salinity variations in surface water systems in Delft Island Sri Lanka

Sivashanthini, K.; Gunaalan, K.; Harichandra, K.; Sutharshiny, S.; Warnasuriya, T.W.S; Ragavan, N. (ResearchGate, 2019)

The present study was carried out to identify the locations and salinity variations of surface water systems in Delft Island. Regular field visits were made from January 2016 to January 2017, GPS locations for all water ...
Vulnerability Of The Aquifer Adjacent To Vadamaradchchi Lagoon, Jaffna Peninsula Using Drastic Index

Gunaalan, K.; Ranagalage, M.; Vithanage, M.; Srivaratharasan, T.; Saravanan, S. (ResearchGate, 2017)

Groundwater is often a forgotten resource in Sri Lanka, which is the hidden prime resource that is the only source of freshwater in the Jaffna peninsula. Saltwater intrusion is alarmingly increasing making freshwater at ...
CoS2TiO2 Nanocomposites for Hydrogen Production under UV Irradiation

Shanmugaratnam, S.; Velauthapillai, D.; Ravirajan, P.; Christy, A.A.; Shivatharsiny, Y. (University of Jaffna, 2019)

Transition metal chalcogenides have intensively focused on photocatalytic hydrogen production for a decade due to their stronger edge and the quantum confinement effect. This work mainly focuses on synthesis and hydrogen ...

Now showing items 341-360 of 655

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