Qualification: 
Ph.D
k_duraisamy@cb.amrita.edu

Dr. Duraisamy Kumaresan received his Ph. D. in Inorganic Chemistry from IIT Bombay (India) in 2004. In 2005, he joined as a post-doc in Tulane University, LA (USA) for pursuing photo/electro-chemical studies on various transition metal complexes, and charge injection dynamics between multi-layer titania networks and organic dyes. Later he moved to the University of Houston, Texas (USA) for pursuing dye-sensitized solar cells research. He joined the Department of Chemical Engineering and Materials Science, Amrita Vishwa Vidyapeetham, in 2009.

Currently, he is leading an interdisciplinary research team in developing materials for the construction of more efficient solar cells, photocatalysts, and photodetectors. His major research interests are dye-sensitized solar cells, quantum dot sensitized solar cells, nanostructured inorganic-organic hybrid semiconductors, self-assembly, electron donor-acceptor systems and ionic liquids.

Publications

Publication Type: Journal Article

Year of Publication Publication Type Title

2018

Journal Article

A. Moorthy, Subramaniam, M. Raj, Manivasagam, T. G., and Dr. Duraisamy Kumaresan, “Surfactant-assisted synthesis of metallic cadmium, cadmium hydroxide nanostructures and their electrochemical charge storage properties.”, Dalton Transactions, 2018.[Abstract]


We report a simple, surfactant-assisted room temperature synthesis of metallic cadmium nanoparticle sheets and their subsequent hydrolysis to the formation of rice-shaped monoclinic cadmium hydroxide nanostructures. These new nanostructures have demonstrated 30-40 fold superior electrochemical charge storage capacity along with quantized double layer charging of metal nanoparticles as compared to the bulk cadmium.

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2018

Journal Article

G. K Baiju, Murali, B., and Dr. Duraisamy Kumaresan, “Synthesis of hierarchical barium titanate micro flowers with superior light-harvesting characteristics for dye sensitized solar cells”, Materials Research Express, vol. 5, p. 075503, 2018.[Abstract]


Hierarchical barium titanate (BaTiO 3 ) micro flowers have been successfully grown on the conducting glass substrates by a two-step hydrothermal process. Morphological and crystal structure analyses revealed that the tetragonal phase BaTiO 3 micro flowers have formed as clusters of highly crystalline, one dimensional parallelepiped nanorods of widths ranging from 50 to 500 nm. The as-grown BaTiO 3 micro flowers tested as dye sensitized solar cell (DSSC) photoanode has showed maximum power conversion efficiency (PCE) of 5.13%, which is comparable to the PCE of TiO 2 nanoparticles based DSSC photoanode (5.90%) measured under one sun illumination conditions. Besides, incident photon to current conversion efficiency (IPCE) and UV–visible absorption analyses have confirmed that the superior light-harvesting capability of BaTiO 3 micro flowers over TiO 2 nanoparticles is observed in DSSC due to their favorable morphological features and increased visible light absorption properties along with the superior charge transport characteristics of nanorods.

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2018

Journal Article

M. Raj Subramaniam, Dr. Duraisamy Kumaresan, Jothi, S., McGettrick, J. D., and Watson, T. M., “Reduced graphene oxide wrapped hierarchical TiO2 nanorod composites for improved charge collection efficiency and carrier lifetime in dye sensitized solar cells”, Applied Surface Science, vol. 428, pp. 439 - 447, 2018.[Abstract]


Three dimensional hierarchical TiO2 nanorods-reduced graphene oxide (HTNs-rGO) composites with different rGO wt% were directly grown on conducting glass substrate by an in situ hydrothermal process for improved charge separation and collection in dye sensitized solar cells (DSSCs). The crystal structure and chemical composition of as grown composites were confirmed by X-ray diffraction and optical studies. Electron microscopic studies on the composites surface morphologies revealed the formation of rGO wrapped or intertwined HTNs architectures onto the FTO substrates with thicknesses ranging from 14.33 to 15.70μm. 2wt% rGO loaded HTNs composite photoanode showed a superior power conversion efficiency of 4.54% as compared to the other wt% rGO loaded HTNs composite and bare HTNs photoanodes in DSSCs. This is due to optimal loading of rGO facilitating formation of a better charge transport channel within HTNs matrix and reducing charge transport resistance (Rtr), which resulted in a higher charge collection of HTNs-rGO composite. Besides, the solar cell current-voltage (J-V) and electrochemical impedance characterizations confirmed the superior light scattering and dye loading capabilities of HTNs, together with a low charge transport resistance and improved charge carrier lifetime in HTNs-rGO composites contributed to the photovoltaic performance enhancement of their DSSCs.

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2015

Journal Article

Dr. Murali Rangarajan, Jelmy, E. J., S. Raj, M., Rajamani, A. R., Kothurkar, N., and Dr. Duraisamy Kumaresan, “Highly Solution Processable Camphor Sulfonic Acid-Doped Multiwalled Carbon Nanotube/Polyaniline Composite and Its Uses in Dye-Sensitized Solar Cells (Under Review)”, Journal of Polymer Science B: Polymer Physics, 2015.

2015

Journal Article

M. R. Subramaniam and Dr. Duraisamy Kumaresan, “CdSe Quantum Dots and N719-Dye Decorated Hierarchical TiO² Nanorods for the Construction of Efficient Co-Sensitized Solar Cells”, ChemPhysChem, vol. 16, pp. 2543-2548, 2015.[Abstract]


Three-dimensional hierarchical TiO2 nanorods (HTNs) decorated with the N719 dye and 3-mercaptopropionic or oleic acid capped CdSe quantum dots (QDs) in photoanodes for the construction of TiO2 nanorod-based efficient co-sensitized solar cells are reported. These HTN co-sensitized solar cells showed a maximum power-conversion efficiency of 3.93, and a higher open-circuit voltage and fill factor for the photoanode with 3-mercaptopropionic acid capped CdSe QDs due to the strong electronic interactions between CdSe QDs, N719 dye and HTNs, and the superior light-harvesting features of the HTNs. An electrochemical impedance analysis indicated that the superior charge-collection efficiency and electron diffusion length of the CdSe QD-coated HTNs improved the photovoltaic performance of these HTN co-sensitized solar cells. © 2015 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim.

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2015

Journal Article

M. R. Subramaniam and Dr. Duraisamy Kumaresan, “CdSe Quantum Dots and N719‐Dye Decorated Hierarchical TiO2 Nanorods for the Construction of Efficient Co‐sensitized Solar Cells”, ChemPhysChem, vol. 16, no. 12, pp. 2543-8, 2015.[Abstract]


Three-dimensional hierarchical TiO2 nanorods (HTNs) decorated with the N719 dye and 3-mercaptopropionic or oleic acid capped CdSe quantum dots (QDs) in photoanodes for the construction of TiO2 nanorod-based efficient co-sensitized solar cells are reported. These HTN co-sensitized solar cells showed a maximum power-conversion efficiency of 3.93 %, and a higher open-circuit voltage and fill factor for the photoanode with 3-mercaptopropionic acid capped CdSe QDs due to the strong electronic interactions between CdSe QDs, N719 dye and HTNs, and the superior light-harvesting features of the HTNs. An electrochemical impedance analysis indicated that the superior charge-collection efficiency and electron diffusion length of the CdSe QD-coated HTNs improved the photovoltaic performance of these HTN co-sensitized solar cells.

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2014

Journal Article

M. Raj Subramaniam, Dr. Sriram Devanathan, and Dr. Duraisamy Kumaresan, “Synthesis of micrometer-sized hierarchical rutile TiO2 flowers and their application in dye sensitized solar cells”, Royal Society of Chemistry (RSC) Advances, vol. 4, pp. 36791–36799, 2014.[Abstract]


Cactus-like hierarchical rutile TiO2 flowers and three dimensional (3D) highly branched rutile TiO2 nanorods with sizes measuring up to 5 microns were synthesized on conductive substrates by a facile hydrothermal route without the presence of a surfactant or template. These samples with different morphologies and microstructures were studied by X-ray powder diffraction (XRD), field emission-scanning electron microscopy (FESEM) and high resolution transmission electron microscopy (HRTEM). We also studied the photovoltaic performances of these samples by using them as photoanodes in dye-sensitized solar cells (DSSCs). The highly branched TiO2 nanorod based photoanode in DSSCs showed a power conversion efficiency of 3.07% which was significantly higher than that of the cactus TiO2 flower based (2.66%) photoanode. The electrochemical impedance spectroscopy (EIS) analysis of the interfacial charge transfer kinetics in these photoanodes in DSSCs showed higher recombination resistance (R2) and longer electron lifetime in highly branched nanorods. The enhancement of the efficiency of the highly branched TiO2 nanorod photoanode based DSSC compared to that of cactus TiO2 flower DSSC is mainly attributed to the superior light scattering capability, fast electron transfer and longer electron lifetime with suppressed recombination.

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2014

Journal Article

A. Nikhil, Thomas, D. A., Amulya, S., S. Raj, M., and Dr. Duraisamy Kumaresan, “Synthesis, characterization, and comparative study of CdSe-TiO2 nanowires and CdSe-TiO2 nanoparticles”, Solar Energy, vol. 106, pp. 109-117, 2014.[Abstract]


Cadmium selenide (CdSe) quantum dots in selective size were prepared by using inverse micelle technique without the presence of trioctylphosphine (TOP) and characterized by UV-visible absorption, Fourier transform infrared (FTIR) and photoluminescence (PL) spectroscopic studies. The UV-visible absorption and PL studies showed strong quantum confinement effect and bandgap energy about 2.1eV in CdSe quantum dots. Particle size and electron diffraction analyses in high resolution transmission electron microscopy (HRTEM) confirmed the formation of CdSe crystalline particles in the range of 3.1-3.9nm. These wide bandgap CdSe quantum dots were used for the preparation of CdSe-TiO2 nanocomposites of TiO2 nanoparticles and TiO2 nanowires. HRTEM images of the CdSe-TiO2 nanowires (CdSe-TNW) and the CdSe-TiO2 nanoparticles (CdSe-TNP) composites revealed the uniform, layered distribution of CdSe quantum dots on TiO2 nanoparticles and on TiO2 nanowires in different dimensions. Further, the differences in the dimensional distributions and optical properties of CdSe-TNW and CdSe-TNP nanocomposites were investigated for their applications to TiO2 sensitized solar cells. © 2014 Elsevier Ltd.

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2012

Journal Article

Dr. Duraisamy Kumaresan, “Photophysical Studies on Terpyridyl Platinum(II) Chromophore-Electron Acceptor Dyads for the Photocatalytic Hydrogen Generation from Water ”, ACS Division of Fuel Chemistry, vol. 57, pp. 66-68, 2012.

2009

Journal Article

Dr. Duraisamy Kumaresan, Thummel, R., Bura, T., Ulrich, G., and Ziessel, R., “Colour Tuning in a Novel Metal-free Organic Sensitizer (Bodipy) for Dye-sensitized Solar Cells”, Chemistry: A European Journal, vol. 15, pp. 6335-6339, 2009.[Abstract]


Fun in the sun! A strategy has been devised for functionalizing and solubilizing boron dipyrromethene (Bodipy) dyes at the central boron atom and changing the color by increasing delocalization on the central core. This approach leads to the formation of stable BC≡C and pyrroleCC linkages suitable for use in TiO2‐sensitized devices (see figure).

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2009

Journal Article

Dr. Duraisamy Kumaresan, Lebkowsky, K., and Schmehl, R. H., “Synthesis, Photophysics and Gel Formation of Terpyridyl Platinum(II) Complexes Covalently Linked to a Naphthalene Diimide”, J. Photochem. Photobio. A: Chemistry, vol. 207, pp. 86-93, 2009.

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