Qualification: 
Ph.D, MSc, B.Ed.
sreekalaco@am.amrita.edu

Dr. Sreekala currently serves as Assistant Professor (Sr. Gr)  at the Department of Physics, Amrita School of Arts and Sciences, Amritapuri. She was conferred with a Ph. D. in Physics from Amrita Vishwa Vidyapeetham in 2011. She plays a key role as Principal Investigators in some of the significant projects.

Education

Ph.D. (Physics) Amrita Vishwa Vidyapeetham 2011
SLET State Level Eligibility Test for Lectureship 1996
BEd (Physical Science) Kerala University, Thiruvananthapuram, 1stDiv 1995
M. Sc. (Physics) Kerala University, Thiruvananthapuram, 1stDiv 1994

Experience

Designation University Year
Assistant Professor Department of Physics Jan 11, 2016 to Present
Assistant Professor School of Biotechnology May 21, 2012 to Jan 10, 2016
Principal Investigator of Project Amrita Vishwa Vidyapeetham May 11, 2009 to May 10, 2012
Subject Matter Expert in Physics    VALUE @Amrita Nov 10, 2008 to December 2015
Lecturer School of Biotechnology, Amrita Vishwa Vidyapeetham Aug 5, 2006 to May 20, 2012
Lecturer Devaswom Board Pampa College, Parumala Nov 5, 2004 to Apr 30, 2006 
Lecturer Government Vocational HSS, Mavelikara Nov 26, 1999 to Oct 30, 2004
Lecturer NSS College, Pandalam July 19, 1998 to Nov 24, 1999

Projects

Sl.No Title Cost (in rupees) Duration Agency
1 Pedagogy Development in Engineering Physics 7 Lakhs 2013-2015 (Ongoing) ICT
2 Organic bulk heterojunction devices for photovoltaic solar cell applications 11.65226 Lakhs 2009-2012 (Completed) DST, Govt.of India

Research Experience

Summer Fellowship- Indian Academy of Science Summer Research Fellowship (SRF-2017) in National Physical Laboratory, New Delhi. May 19, 2017 to July 15, 2017
Research Scholar --- Organic bulk heterojunction devices for photovoltaic solar cell application, funded by Government of India, Department of Science and Technology (DST), New Delhi.
Funded by Government of India, Department of Science and Technology (DST), New Delhi
January 2008 to December 2011
Principle Investigator --- VALUE @ Amrita Physics Virtual Labs, Virtual and Accessible Laboratories Universalizing Education,
Funded by Government of India Ministry of Human Resource Development (MHRD)National Mission on Education Through Information and Communication Technology (NME-ICT) (No. F.5-29/2007-DL)
November 10, 2008 to Present

PhD STUDENTS

Sl.No Name of the Student Topic
1 Malini Prabhakaran Synthesis of Lead Salt based Nanostructures and Heteronano structures for Photo voltaic Applications
2 Ancy Albert (Full time) Ameliorating the room temperature stability of perovskite materials for solar cell application

Awards

  • Certificate of appreciation from Amrita Vishwa Vidyapeetham for the year 2011-2012, 2012-2013, 2013-2014, 2014-2015
  • Best Paper Presentation Award, in the ICMENS-2011 conference held at Kuala Lumpur Malaysia, during Nov 4th- 6th, 2011
  • Certificate of appreciation from Amrita Vishwa Vidyapeetham for the year 2010-2011
  • Certificate of appreciation from Amrita Vishwa Vidyapeetham for the year 2009-2010
  • Young Woman Scientist Award (2008) from Department of Science and technology (DST) through a project (SR/WOS-A/PS-04/2008)

INTEREST

  • Organic thin film sensors for radiation sensing and biosensing applications.
  • Thin film solar cells, Dye sensitized solar cells, Perovskite solar cells etc
  • Development of Micro electro mechanical systems (MEMS)
  • Microcontact printing of Biomolecules and Nanoelectronicsic
  • Microfludics and Biosensor
     

TEACHING

Publications

Publication Type: Conference Proceedings

Year of Conference Publication Type Title

2017

Conference Proceedings

V. G. Nandakumar, Suresh, S., Dr. Sreekala C. O., Sudheer, S. K., and Pillai, V. P. Mahadevan, “Hemigraphis Colorata As A Natural Dye For Solar Energy Conversion”, Materials Today: Proceedings, vol. 4. Elsevier, pp. 4358-4365, 2017.[Abstract]


Natural dye extracted from Hemigraphis colorata (Red flame) is used as photosensitizer in dye sensitized solar cells along with TiO2 nano particles and its characteristics are studied. The dye is extracted with minimal chemical procedure and is used without further purification. UV-Visible absorption spectroscopy and micro-Raman spectroscopic studies indicate the presence of anthocyanin and beta-carotene in the extracted dye sample. Photovoltaic property of hemigraphis colorata is studied and an energy conversion efficiency of 0.0065% was obtained. The high concentration of anthocyanin in the extracted dye sample is responsible for the photovoltaic property of hemigraphis colorata.

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2012

Conference Proceedings

Dr. Sreekala C. O., Saneesh, P. F., Sreelatha, K. S., Kishnashree, A., and Roy, M. S., “Organic Bulk Heterojunction Solar Cell Based On Rosebengal: Nctio2 And Parameter Extraction By Simulation”, Advanced Materials Research, vol. 403. Trans Tech Publications, pp. 4304-4310, 2012.[Abstract]


In bulk heterojunction solar cells, the donor and acceptor materials are intimately blended throughout the bulk, so that the excitons generated will reach the interface within their lifetime. In this work, Rosebengal (RB) is used as the donor material and nanocrystalline Titanium dioxide (nc TiO2) as the acceptor material. Devices with device structure ITO/RB:TiO2/Ag are prepared and their optical and electrical properties are compared at different temperatures. Optical absorption spectroscopic analysis shows that the absorption of Rose bengal ranges from 650-800 nm corresponding to a band gap of 1.98 eV. Cyclic voltametric analysis, and photo voltaic properties are analysed. Using simulation, the dark current parameters such as ideality factor (n), mobility (µ) potential barrier (φb) and carrier concentration are extracted and tabulated.

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2008

Conference Proceedings

K. S. Sreelatha, Roy, M. S., and Dr. Sreekala C. O., “Photoelectrical Properties of Bulk Heterojunction Devices Based on Rose Bengal and TiO2 Nanoparticle”, Proceeding of the International Conference on Solar Cells IC-SOLACE 2008. pp. 390-392, 2008.

Publication Type: Journal Article

Year of Conference Publication Type Title

2016

Journal Article

Jinchu .I, Jyothi .R, Pandurangan Nanjan, K .S.Sreelatha, Dr. Krishnashree Achuthan, and Dr. Sreekala C. O., “Anthraquinones- A probe to enhance the photovoltaic properties of DSSC”, International Journal of Electrical and Computer Engineering (IJECE), vol. 6, no. 3, pp. 1274-1280, 2016.[Abstract]


Natural dye sensitized solar cells are a promising class of photovoltaic cells with the capacity of generating green energy at low production cost since no expensive equipment is required in their fabrication. Photovoltaics are a precious technology in the hasty world where energy prices are goes on increasing within seconds. Researchers are focusing to facilitate for producing eco-friendly, low cost and more efficient dye sensitized solar cells. In the present work we discuss the comparative photovoltaic studies of Lawsone, a natural dye from henna plant and Alizarin, a natural dye from the root of madder for fabricating the Dye sensitized solar cells (DSSCs). The absorption spectrum of Lawsone and Alizarin is found to be shifted to the longer wavelength region after the complex formation. As a result there is a significant increase in short circuit current density and conversion efficiency. This result compares with the standard dye i.e. N719 dye.

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2016

Journal Article

A. George, Thanseema, A. P., Sreelatha, K. S., Dr. Sreekala C. O., and Jinchu, I., “Device stability study of dye sensitized solar cells incorporated with MWCNTs”, Electrical, Electronics, and Optimization Techniques (ICEEOT), International Conference on, 2016.[Abstract]


A dye sensitized solar cell [1] is a new class of low cost solar cell that belongs to the group of thin film solar cells and offer enormous potential as an alternative renewable energy provider. The necessity of energy in all over the world has been growing abruptly over the years. Since conventional energy cannot handle with these unexpected escalating changes, so we must think about options to overcome this fast growing energy crisis, there has been raising interest in non conventional energy sources. Solar photovoltaic cell [2] could be one such alternative energy source since solar energy is abundantly in all over world which is renewable, and ecofriendly to the living things. Significant enhancement in the power-conversion efficiency of natural dye sensitized solar cells has been reported by mimicking the principles of natural photosynthetic light-harvesting complexes. DSSCs based on co-sensitization of chlorophyll-a derivative with a chlorophyll-b or c derivative a highest power conversion efficiency of up to 5.4% has been obtained [3]–[5]. More »»

2016

Journal Article

A. JS, NP, S., S, S., KP, V., ,, Prabhakaran, M., Isonc, V. V., and Dr. Sreekala C. O., “Surface Modified Lead Sulphide Quantum Dots For In Vitro Imaging Of Breast Cancer Cells Adopting Confocal Raman Spectroscopy”, International Journal of Chemical Sciences, vol. 14, 4 vol., 2016.[Abstract]


Nanoparticles are potentially used for early cancer detection, accurate diagnosis, and cancer treatment. Due to their small direct band gap and large excitation Bohr radius, lead sulphide quantum dots are important semiconductor material. The red shifted emission band, coupled with the small particle size, is facilitating clearance of imaging. Lead sulphide quantum dots bio-conjugates are promising candidates for targeted infrared molecular imaging and future infrared tissue imaging applications. Because of these many characters, in this paper, we tagged cancer cells with quantum dots for better imaging in IR region. We synthesized lead sulphide quantum dots using Hines and Scholes method. Surface modification of quantum dots is carried out using L-cysteine. Surface modification makes semiconductor quantum dots water soluble. The amino groups present in L-cysteine will bind to the cancer cells and the thiol group will bind to the quantum dots. Confocal Raman spectroscopy is used to image the cancer cells tagged with modified lead sulphide quantum dots.

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2016

Journal Article

S. Suresh, Deepak, T. Gangadhara, Ni, C., Dr. Sreekala C. O., Satyanarayana, M., A. Nair, S., and Pillai, V. Pappukkuty, “The Role Of Crystallinity Of The Nb2O5 Blocking Layer On The Performance Of Dye-Sensitized Solar”, New Journal of Chemistry, vol. 40, 7 vol., pp. 6228-6237, 2016.[Abstract]


The prevention of back electron transfer by inserting an energy barrier layer at the interface of a photo-anode is an effective method for improving the photovoltaic parameters in dye sensitised solar cells (DSSCs). In this study, phase a modified Nb2O5 blocking layer was inserted at the fluorine doped tin oxide (FTO)/TiO2 interface via a Rf magnetron sputtering process. For a critical tunnelling distance of ∼40 nm, the crystalline Nb2O5 blocking layer improved the efficiency close to 7% and outperformed the amorphous blocking layer by about 68%. The longer electron lifetime observed in DSSCs containing an inhomogeneous Nb2O5 layer indicates that trapping/de-trapping impedes the discharge of electrons to the TiO2 band edge. The origin of the longer electron lifetime is explained by formulating a theory from photovoltage decay measurements.

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2015

Journal Article

Dr. Sreekala C. O., Jinchu, I., Sajeev, U. S., Achuthan, K., and Sreelatha, K. S., “Photoanode Engineering Using TiO2 Nanofibers for Enhancing the Photovoltaic Parameters of Natural Dye Sensitised Solar Cells”, Journal of Nano-and Electronic Physics, vol. 7, no. 4, pp. 4002-1, 2015.[Abstract]


Dye Sensitized solar cell (DSSC) have been looked upon as having the potential to modernize photovoltaic as a cost effective technology. Especially nanostructured DSSC is proposed to have the capability to boost the efficiency by limiting charge recombination, thereby increasing the charge transportation which affects the overall conversion efficiency favourably. In the present work we discuss the effect of nanofibers as photo anode for increasing the efficiency of a dye sensitized solar cell. As we know nanostructured metal oxides have paying much attention in the field of photovoltaics due to their physical properties and dimensionality. This type of geometry provides direct and spatially separated charge transport channels for electrons and holes. TiO2 single-crystalline nanofibers of different diameter are prepared by electrospinning process and TiO2 nanoparticles by doctor blade technique are used for fabricating the device using natural sensitizers.

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2015

Journal Article

Dr. Sreekala C. O., “Photovoltaic studies of dye sensitized solar cell with modified PEDOT:PSS as counter electrode”, International Journal of Advance Research in Science and Engineering, vol. 4, no. 4, pp. 90-95, 2015.

2015

Journal Article

B. Krishnan, .M, A., .S, A., .J, S., Kumar.M, K., .U.S, S., and Dr. Sreekala C. O., “Electrospun TIO2 nanofibers as a matrix to enhance the drug loading”, IJARSE, vol. 4, no. 05, 2015.

2014

Journal Article

V. Kumar. A, Dr. Sreekala C. O., M, M., Ashok, A., and Rasheed, R., “Benchtop Nanoscale Patterning using Soft Lithography for the Printing of DNA Molecules”, International journal of Engineering research and technology, vol. 3, 2014.

2014

Journal Article

I. Jinchu, Sharma, A. B., Dr. Sreekala C. O., Sreelatha, K. S., and Dr. Krishnashree Achuthan, “Enhanced photovoltaic performance of the dye sensitized solar cell using natural dyes with surface modification of the photoanode”, Materials Science Forum, vol. 771, pp. 159-168, 2014.

2014

Journal Article

I. Jinchu, Dr. Sreekala C. O., and Sreelatha, K. S., “Dye sensitized solar cell using natural dyes as chromophores-review”, Materials Science Forum, vol. 771, pp. 39-51, 2014.[Abstract]


The molecular dye is an essential component of the Dye sensitized solar cell (DSSC), and improvements in efficiency over the last 15 years have been achieved by tailoring the optoelectronic properties of the dye. The most successful dyes are based on ruthenium bipyridyl compounds, which are characterized by a large absorption coefficient in the visible part of the solar spectrum, good adsorption properties, excellent stability, and efficient electron injection. However, rutheniumbased compounds are relatively expensive, and organic dyes with similar characteristics and even higher absorption coefficients have recently been reported; solar cells with efficiencies of up to 9% have been reported. Organic dyes with a higher absorption coefficient could translate into thinner nano-structured metal oxide films, which would be advantageous for charge transport both in the metal oxide and in the permeating phase, allowing for the use of higher viscosity materials such as ionic liquids, solid electrolytes or hole conductors. Organic dyes used in the DSSC often bear a resemblance to dyes found in plants, fruits, and other natural products, and several dye-sensitized solar cells with natural dyes have been reported. This paper gives an over-view of the recent works in DSSC using the natural dyes as chromophores. © (2014) Trans Tech Publications, Switzerland. More »»

2013

Journal Article

Dr. Sreekala C. O., Roy, M. S., K .S.Sreelatha, Kumar, K. B. S. P., and Jinchu, I., “Functionalized Multi Walled Carbon Nanotubes (MWCNTs) for enhanced Photocurrent in Dye Sensitized Solar Cells”, Journal Of Nanostructure in Chemistry, vol. 3, 2013.[Abstract]


The influence of the incorporation of nitric acid-treated (functionalized) multi-walled carbon nanotubes (f-MWCNTs) and unmodified MWCNTs in TiO2 films are investigated by observing the photocurrent-voltage characteristics of dye-sensitized solar cells (DSSCs) with and without MWCNTs. The short-circuit photocurrent (J sc) of the modified DSSC increased by 46% compared with that of a cell with plain TiO2 film. The open-circuit voltage remained the same for all cases. The enhanced J sc is explained by the increased surface area of the film, enhanced cluster formation of TiO2 particles around f-MWCNTs, and improved interconnectivity of TiO2 particles in the presence of f-MWCNTs. The efficiency of the cell increased by 45% due to J sc enhancement.

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2012

Journal Article

Dr. Sreekala C. O., Jinchu, I., Sreelatha, K. S., Janu, Y., Prasad, N., Kumar, M., Sadh, A. K., and Roy, M. S., “Influence of Solvents and Surface Treatment on Photovoltaic Response of DSSC Based on Natural Curcumin Dye”, Photovoltaics, IEEE Journal of, vol. 2, pp. 312–319, 2012.[Abstract]


Dye-sensitized solar cells have recently drawn much attention because of their cost effectiveness and easy manufacturing process. However, the challenge lies in minimizing the cost of sensitizer dyes and the platinum-based counter electrode. Natural dyes such as red cabbage, red perilla, rosella, blue pea, and curcumin represent a low-cost, environmentally friendly alternative to costly ruthenium-based complexes for sensitization of nc-TiO$_2$. Attempts are being made to improve the efficiency of a cell based on natural dyes by way of selecting a proper sensitizer, modifying the surface of a working electrode by chemical treatment, and replacing a platinum-based counter electrode. We have adopted two approaches to improve the photovoltaic response of a cell, i.e., 1) modifying the surface of a working electrode by treating it with HCl and TiCl$_4$ and 2) using different organic solvents to enhance the extent of sensitization. PEDOT:PSS grown over graphite-coated fluorine-doped tin oxide is used as a counter electrode to catalyze the reduction of triiodide (${rm I}_3^ -$) to iodide (I$^-$). A TiCl$_4$ -treated photoelectrode, on sensitization with curcumin, gives maximum power conversion efficiency. The impact of the solvent's polarity in dye diffusion was determined with cyclic voltametry. Kelvin probe, SEM, and Raman spectroscopy are employed to justify the surface modification of nc-TiO$_2$ induced by TiCl$_4$ treatment.

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Publication Type: Conference Paper

Year of Conference Publication Type Title

2016

Conference Paper

A. Ramachandran, Jinchu, I., and Dr. Sreekala C. O., “Studies on polymer based counter electrodes for DSSC application”, in 2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016.[Abstract]


Dye-sensitized solar cell provides a precisely and economically reliable alternate concept of present day energy crisis. DSSC have emerged as the next generation of photovoltaic devices, offering several advantages, including moderate light to conversion efficiency, low cost, flexible and easy fabrication. DSSC have many components that have to be optimized, are a mesoporous titania layer adsorbed with dye molecule, electrolyte and a counter electrode. In this work we focused on making polymer based counter electrodes for DSSC application. We made counter electrodes with PEDOT:PSS incorporated with MWCNTs and compared with the standard platinum counter electrode. The optical transmittance of the counter electrodes is studied to examine their possibility for use as transparent counter electrodes for DSSC application. More »»

2016

Conference Paper

I. Jinchu, Dr. Sreekala C. O., Sreelatha, K. S., and Mohan, R. E., “Photovoltaic parameters of DSSCs using natural dyes with TiO2 nanopowder and nanofiber as photoanodes: A comparative study”, in 2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016.[Abstract]


Dye-sensitized solar cells (DSCs) are currently attracting academic and commercial interest as regenerative low-cost alternatives to conventional solar cell devices. Researchers are focusing to facilitate for producing a low cost, eco-friendly and more efficient dye sensitized solar cells. Natural dye sensitized solar cells are a promising class of photovoltaic cells with the capacity of generating green energy at low production cost since no expensive equipment is required in their fabrication. In the present work we discuss the effect of Photoanodes sensitized with natural dyes Lawsone and Alizarin. We compared the efficiency of the devices fabricated with TiO2 nanofibers and nanopowder as photoanodes using these natural dyes. It is found that when we used nano fibers instead of nano powder as photo anode the dye adsorption on the TiO2 surface increases. This helps to harvest more photons and increases photocurrent density. As a result there is a significant increase in short circuit current density and conversion efficiency. More »»

2016

Conference Paper

I. Jinchu, Krishnan, B., Dr. Sreekala C. O., Balakrishnan, N., Sajeev, U. S., and Sreelatha, K. S., “Escalating the performance of perovskite solar cell via electrospun TiO2 nanofibers”, in 2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016.[Abstract]


A Perovskite solar cell is a type of solar cell which includes a perovskite structured compound, most commonly a hybrid organic-inorganic lead or tin halide based material, as the light harvesting active layer. In this work solar cell based on titanium dioxide (TiO2) thin film, sensitized with methyl ammonium lead iodide (CH3NH3PbI3) perovskite are prepared. Thin films were grown on fluorine doped tin oxide (FTO) glass plate. TiO2 is working as the anode and a noble metal will work as the cathode. A perovskite is more efficient than a dye in sensitizing a solar cell. It will act both as hole transporting material and sensitizer. It is found that the efficiency of solar cell devices using these materials shows considerable change in Voc and Jsc by the use of TiO2 nanofibers as the anode material. More »»

2016

Conference Paper

M. Prabhakaran, Dr. Sreekala C. O., Tom, A. E., Thomas, A., and Ison, V. V., “Synthesis and characterization of Lead Selenide quantum dots for photovoltaic application”, in 2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016.[Abstract]


Lead Selenide (PbSe) quantum dots (QDs) with absorption in the NIR region are synthesized in a non-coordinating solvent, octadecene by organometallic synthesis procedure. The high resolution transmission electron microscopy (HRTEM) analysis demonstrated spherical shape and monodispered nature of PbSe Quantum dots. Absorption spectrum demonstrates that the QDs show absorbance in the near infrared (NIR) region. The synthesized QDs give a good dispersion in n-hexane. More »»

2016

Conference Paper

S. Mohan, Dr. Sreekala C. O., Tom, A. E., Thomas, A., and Ison, V. V., “Photovoltaic studies of PbSe quantum dot based solar cells”, in 2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016.[Abstract]


The PbSe quantum dots are synthesized by organometallic synthesis method. The current-voltage (J-V) characteristics of TiO2/PbSe quantum dot (QD) solar cells from a Schottky junction that forms at the back metal electrode opposing the desirable diode formed between the TiO2 and PbSe QD layers. We study the J-V curves of the FTO/TiO2/PbSe/Au device under dark and illuminated condition. The FESEM image of the device cross section is taken and analyzed. We also study the band structure of the device. More »»

2016

Conference Paper

N. Ajayakumar, Dr. Sreekala C. O., Tom, A. E., Thomas, A., and Ison, V. V., “Heterojunction TiO2/PbS quantum dot solar cells”, in 2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016.[Abstract]


PbS Quantum dots are promising materials for photovoltaic applications due to their absorption in the NIR region. In this work monodisperse lead sulfide quantum dots are synthesized using colloidal procedures using oleic acid and oleylamine as the stabilizing agents and 1-octadecene as the non-coordinating solvent. Heterojunction solar cell with FTO/TiO2/PbS/Au structure is fabricated and characterized. The current-voltage characteristics shows the roll-over effect that refers to the saturation of photocurrent in forward bias and crossover effect which occurs when the light and dark J-V curves intersect. More »»

2014

Conference Paper

Dr. Krishnashree Achuthan, S., F., Prof. Nedungadi, P., Raghu Raman, l., B., Dr. Sreekala C. O., and Sreelatha, K. S., “Improving Perception of Invisible Phenomena in UG Physics Education Using ICT”, in International Conference on Information and Communication Technology (IEEE Xplore), 2014.[Abstract]


Experimental learning plays paramount role in Physics education. Experimental physics requires phenomenological investigations in several cases and this includes understanding visible and invisible heuristic procedures to discern underlying concepts. This study investigates the invisible yet evident occurrences of physical phenomena that are difficult to grasp from a learner's perspective. In this work the contribution of compounded effects of using computational techniques, multimedia enhanced simulations and interactive animations to draw the learner's attention to those physically undiscernable aspects of physics experiments is presented. The study has investigated three physics experiments by engineering students (N= 42) and the methodology focused on differentiating the learning outcomes between classroom teaching, laboratory experimentation and virtual laboratories. The students were divided into two batches. Visual and conceptual understanding was quantified by assessments that included their visual and conceptual understanding. Our study not only revealed severe limitations in learning invisible phenomena based on traditional classroom methods but also empirically validated the positive impact on learning outcomes when the classroom method is combined with Virtual Labs approach.

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PDF iconimproving-perception-of-invisible-phenomena-in-ug-physics-education-using-ict.pdf

2011

Conference Paper

Dr. Krishnashree Achuthan, Sreelatha, K. S., Surendran, S., Dr. Shyam Diwakar, Prof. Nedungadi, P., Humphreys, S., Dr. Sreekala C. O., Dr. Zeena S. Pillai, Raghu Raman, Deepthi, A., Gangadharan, R., Dr. Saritha A., Ranganatha, J., Sambhudevan, S., and Mahesh, S., “The VALUE @ Amrita Virtual Labs Project: Using Web Technology to Provide Virtual Laboratory Access to Students”, in Global Humanitarian Technology Conference (GHTC), 2011 IEEE, 2011, pp. 117-121.[Abstract]


In response to the Indian Ministry of Human Resource Development (MHRD) National Mission on Education through Information and Communication Technology (NME-ICT) Initiative, the Virtual and Accessible Laboratories Universalizing Education (VALUE @ Amrita) Virtual Labs Project was initiated to provide laboratory-learning experiences to college and university students across India who may not have access to adequate laboratory facilities or equipment. These virtual laboratories require only a broadband Internet connection and standard web browser. Amrita Vishwa Vidyapeetham University is part of a consortium of twelve institutions building over two hundred virtual labs covering nine key disciplines in science and engineering. This National Mission project hopes to reach out to India's millions of engineering and science students at both undergraduate and postgraduate levels. The Virtual Labs Project is providing virtual laboratory experiments that directly support the All India Council for Technical Education (AICTE) and the University Grants Commission (UGC) model curricula for engineering and sciences undergraduate and postgraduate programs.

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PDF iconthe-value-amrita-virtual-lab-project-using-web-technology-to-provide-virtual-laboratory-access-to-students.pdf

2011

Conference Paper

Dr. Sreekala C. O., Sreelatha, K. S., and Roy, M. S., “Hybrid Bulk Heterojunction Solar Cells based on Metal Phthalocyanines”, in National Seminar on Trends in Physical Sciences (TriPS-2011), SreeSankara College, Kalady, Kerala, 2011.

2010

Conference Paper

K. B. S. Pavan Kumar, Sreelatha, K. S., .S.Roy, M., and Dr. Sreekala C. O., “Improvement in Conversion Efficiency of Dye-sensitized Solar Cells Using Functionalized Multi-wall Carbon Nanotubes in the TiO2 Sensitization Process”, in International Conference in nanotechnology for Sustainable Energy-2010, organized by European Science Foundation (ESF), Innsbruck, Austria, 2010.

2010

Conference Paper

Dr. Sreekala C. O., Sreelatha, K. S., and Roy, M. S., “Electrical and Optical Studies of Bulk Hetrojunction Device Based on CuPc and ZnS”, in International conference on Materials for the Millennium (MatCon 2010), University of Science and technology, Kochi, Kerala, 2010.

2010

Conference Paper

Y. Janu, Roy, M. S., Dr. Sreekala C. O., and K .S.Sreelatha, “Enhancement of Photovoltaic Properties by the Surface Treatment of Nanostructured TiO2 in DSSCs using Curcumin Dye as Sensitizer”, in International Conference on Photochemical Conversion on Solar Energy (icpse-2010), Amrita Vishwa Vidyapeetham, Coimbatore, 2010.

2008

Conference Paper

Dr. Sreekala C. O., Balraju, P., Deol, Y. S., Pradeep, P., and Roy, M. S., “Photo Response in Zinc Oxide Doped Alizarin Thin Film”, in Thermophysical Properties of Materials and Devices: IVth National Conference on Thermophysical Properties-NCTP'07, 2008.[Abstract]


Hybrid structure based on organic and inorganic materials are emerging as most promising materials for photovoltaic applications. We have designed a hybrid structurc based on Alizarin (1, 2 dihydroxy anthraquinone) and a wide band gap zinc oxide. Alizarin acts as donor and zinc oxide acts as an acceptor material. The device having configuration of ITO/Aln:ZnO/Ag was characterized by analyzing its optical and electrical characteristics. It is found that the doping with zinc oxide imparts an accelerated improvement in device performance particularly in terms of its photo response. Impedance analysis of the device was carried out by recording Cole‐Cole plot in between real and imaginary impedance under biasing varying from 0 to 5 V.

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Publication Type: Thesis

Year of Conference Publication Type Title

2012

Thesis

Dr. Sreekala C. O., “Studies On Organic Bulk Heterojunction Devices For Photovoltaic Solar Cell Applications”, 2012.

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