Qualification: 
Ph.D, MPhil
ks_rajani@cb.amrita.edu

Dr. K. S. Rajni did her M. Phil from Bharathiar University, India and completed her Doctoral dissertation in Physics from Bharathiyar University, India.

Her M. Phil. work was based on Characterization of CdS Thin Films Prepared by Spray Pyrolysis Technique. Her doctoral studies were focused on Preparation of Photo Electro Chemical (PEC) Cells based on CdSe, InSe Doped CdSe and ZnSe Doped CdSe Thin Films by Electron Beam Evaporation Technique.

Dr. Rajni is guiding a number of undergraduate & postgraduate student projects and Ph. D. research scholars. She currently researches on Dye Sensitized Solar Cell using Naturally Available Organic Materials as Sensitiser.

She involved in the project titled, Developing Nano Electrodes and Membrane for Direct Methanol and Ethanol Fuel Cells – Preliminary Studies.

Workshops Attended

  • Participated in Bhabha Atomic Research Centre (BARC) sponsored two day workshop on Macro-Nanotechnology for societal cause conducted by PSG Institute of Advanced Studies, Coimbatore during October 4 - 5, 2012.
  • Attended DST sponsored two day national workshop on Exigent Apprehensions in Scaling up & Stacking Fuel Cells, during June 22 - 23, 2012 at Department of Automobile Engineering, PSG College of Technology, Coimbatore.
  • Participated in DST PURSE sponsored national workshop on Advanced Instruments for Characterization at Department of Nanosciences and Technology, Bharathiyar University, Coimbatore.
  • Attended in DAE-BRANS theme meeting on Materials Chemistry (TMMC-2012), UGC-DAE CSR during Feb 13 – 15, 2012 at Kalpakkam,Tamil Nadu.
  • Attended a two day workshop on Fuel Cell Technology at National Institute of Technology, Calicut, Kerala during June 11- 12, 2011.
  • Participated in fifth NIAS- DST workshop on Nano Technology: Dimensions of Nano Science, Nano Technology & Society for Women Scientists & Technologists during Dec 14 - 18, 2009 at National Institute of Advanced Studies, Bangalore.

Invited Talks

  • Delivered a talk on Quantum confinement in Fifth NIAS- DST Workshop on Nano Technology: Dimensions of Nanoscience, Nanotechnology & Society for Women Scientists & Technologists at National Institute of Advanced Studies, Bangalore.

Publications

Publication Type: Conference Proceedings

Year of Conference Publication Type Title

2013

Conference Proceedings

Dr. Rajni K. S., “Conduction Studies on Cadmium Selenide (CdSe) Thin Films,”, International Conference on Thin Films & Applications (ICTFA-2013) . 2013.

2013

Conference Proceedings

S. S, D., A., C., G., P., S., Dr. Rajni K. S., and T., R., “Fabrication And Optimization Of Parameters For Dye Sensitized Solar Cell”, International Conference on Nanomaterials for Frontier Applications and Indo-Norwegian Workshop on Advanced Materials for Solar Cell Applications (ICNFA 2013), vol. 3. Coimbatore, pp. 1-5, 2013.[Abstract]


The interest in the dye sensitized solar cell is due to its low cost, simple preparation techniques and benign effect on the environment. Thin film of TiO2 deposited on FTO (Fluorine doped Tin Oxide) acts as one electrodes, platinum coated FTO acts as the other electrode and eosin B solution acts as the sensitizer. Lithium iodide, iodine in acetonitrile solution is used as the electrolyte. It is noted that an efficiency of 7.4% was observed for a cell with Intensity 70 lux. Also the open circuit voltage of 0.5V, short circuit current of 150µA and a fill factor of 0.68 were observed for the cell of area 1X1 cm 2. The experimental model is checked with theoretical model using MATLAB software. It is noted that the simulated values follow a pattern which closely resembles the actual values of the experiment. The effect of the aging process on the overall performance of the device was analyzed by means of electrochemical impedance spectroscopy. The results shows that the electrolyte-TiO2 capacitance of 20 µF (parallel) and the resistance of 14.74 k ohms (parallel) in series with the platinum resistance of 25.58 ohms.

More »»

2012

Conference Proceedings

Dr. Rajni K. S., S., V. V., and M., J., “In Doped CdSe Nanocrystalline Thin Film for PEC Solar Cells”, International Conference on Nanoscience and Nanotechnology-ICREU 2012 . Mexico, 2012.

2012

Conference Proceedings

Dr. Rajni K. S., S., V. V., and M., J., “Cadmium Selenide (CdSe) PEC (Photo Electro Chemical) Solar Cells”, International Conference on Renewable Energy Resources for 21st Century - Challenges & Opportunities. Ettimadai, 2012.

2012

Conference Proceedings

Dr. Rajni K. S., S., V. V., and M., J., “Structural Investigations of CdSe and Indium Selenide Doped CdSe Films”, International Conference on Recent trends in Advanced Materials . Vellore, 2012.

2012

Conference Proceedings

Dr. Rajni K. S., “Structural and Bandgap Analysis of Electron Beam Evaporated Indium Selenide Nanocrystalline Thin Film”, NanoSciTech 2012, International conference on frontiers of nanoscience, nanotechnology and their applications . 2012.

2012

Conference Proceedings

Dr. Rajni K. S., S., V. V., and M., J., “Raman Spectroscopy Studies of Electron Beam Evaporated CdSe Films Prepared at Different Substrate Temperatures”, International conference on frontiers in materials science for Energy and Environment. Loyola College, Chennai , 2012.

2011

Conference Proceedings

Dr. Rajni K. S., “Microstructural and Optical Investigations of Thermally Evaporated CdSe Thin Film”, International conference on Advanced Materials ICAM-2011. 2011.

2011

Conference Proceedings

Dr. Rajni K. S., “Structural Investigations of Electron Beam Evaporated Indium Selenide Thin Film at Different Thicknesses”, DRDO sponsored National Conference on Recent trends in Materials Science - 2011 (NCRTMS-2011) . KS Rengasamy college of Technology, Tiruchencode , 2011.

2011

Conference Proceedings

Dr. Rajni K. S., S., V. V., and M., J., “Effects of Substrate Temperature on the Structural Properties of CdSe and In Doped CdSe Thin Films”, 7th international conference on MEMS NANO and Smart system. Kaulalampur, Malaysia , 2011.

2010

Conference Proceedings

Dr. Rajni K. S., S., V. V., and M., J., “Nanocrystalline CdSe Thin Films Photo Electrochemical (PEC) Solar Cells”, International Workshop on Applications of Nanotechnology to Energy, Environment and Biotechnology (NANO EEB). St. Aloysius College Mangalore, 2010.

2009

Conference Proceedings

Dr. Rajni K. S., S., V. V., and M., J., “Structural Properties of Electron Beam Evaporated CdSe Polycrystalline Films”, UGC Sponsored National Conference on Nanomaterial for Energy Conversion and Conservation (NMCEE'09) . Tiruchirappalli, 2009.

Faculty Research Interest: 
207
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15
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8th
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