Expertise in design and fabrication of nano-scale energy harvesting devices
Extensive experience in synthesis and characterization of Plasmonic nanoparticles (Nanospheres, Nanostars, Nanorods, Nanopentagons, Nanohexagon, Nanowire etc.).
Hands on experience in electromagnetic simulation tools (FDTD, RCWA)
Familiar with material characterization instruments such as SEM, TEM, AFM, XRD etc.
RESEARCH INTEREST
Solar Cells:
Fabrication techniques for making photovoltaic devices (organic and inorganic) for energy harvesting, plasmon waveguides, Sensors for chemical and biological sensing using plasmon based approach.
Synthesis of nanoparticles and their application in photovoltaic devices, chemical sensors, and biological sensors.
KEY RESEARCH SKILLS WITH EXPERIENCE
Expert user and operator for Ellipsometery (J.A. Woollam) at Nanoscale Research Facility (NRF), IIT Delhi
Regular user in clean room of class 1000 (Nanoscale Research Facility, IIT Delhi) and operating advanced fabrication tools like E-beam evaporation, ALD system, Pulsed Laser Deposition (PLD) systems.
Expert user and operator for characterization facilities like AFM, UV-VIS spectrometer, Solar Simulator, and Dark field spectroscope.
Simulation and analysis tools like FDTD (Lumerical, RSoft), RCWA (RSoft).
Patents
2019
IIT-JATC has approved filing of patent for "Plasmonics Based Hydrogen Sensing"
IIT-JATC has approved filing of patent for "Plasmonics Enhanced Multijunction Organic Solar Cells (Doctoral Research)"
JOURNEY
2019
Indian Institute of Technology
Research Associate, Delhi
2019
Doctor of Philosophy (Electrical Engineering) [Thesis submitted in 2019]
Indian Institute of Technology, Delhi
2012
Master of Technology (Opto Electronics and Optical Communication)
Indian Institute of Technology, Delhi
2005
Master of Science (Physics)
MGS university, Bikaner, Rajasthan
TECHNICAL EXPERTISE
5 years class 1000 clean room working experience as an expert in Ellipsometry for characterization of thin films
Fabrication Tools:
E-beam evaporation to deposit a thin film of metals and oxide
Thermal evaporation to deposit a thin film of metals and oxide
Organic evaporation to deposit a thin film of organic semiconductors
ALD to deposit a thin film of oxides
PLD to deposit a thin film of oxides and conducting materials
Chemical Synthesis Tools:
Hot plate with stirrer to synthesize nanoparticles
Spin coater to spin coat a thin film of organic semiconductors and oxide precursor
Ultra sonicator to clean the samples and to prevent the nanoparticles from agglomeration
UV ozone cleaner to clean and change the work function of the ITO film
Characterization Tools:
Atomic force microscopy (Nanosurf) for surface topology of thin films
UV-vis spectrometer for the resonance peak of the nanoparticles and to calculate the absorption and transmission of the thin films of organic semiconductors and other oxide materials
Solar simulator for IV characteristic of solar cells
Transmission Electron Microscopy (TEM) to characterize the nanoparticles
Ellipsometry to characterize the thin films of metals, semiconductors, and oxides
Other Tools:
Glove Box for thin film of organic semiconductors in N2 environment
Research Tools:
RSoft (RCWA), Lumerical (FDTD)
REVIEW EXPERT
International Conference on Nanotechnology & Nanophotonics at Kerala in April 2020
KEY CONTRIBUTION TO RESEARCH & DEVELOPMENT
Plasmonic Enhanced Organic Solar Cells (Doctoral Research) at IIT Delhi
Plasmon Based Gas and Bio Sensor at IIT Delhi
Plasmonic Waveguide at IIT Delhi
RESEARCH PROJECTS
Surface plasmon and localized surface plasmon resonance based solar cells, biological and chemical sensing, plasmonic waveguides.
Sponsoring Agency: Industrial Research & Development (IRD), IIT Delhi
RESEARCH EXPERIENCE
Indian Institute of Technology, Delhi
Background: The research is primarily focused on electromagnetic simulations & synthesis of plasmonic nanostructures that could be employed for wide range applications ranging from solar cells, chemical and biological sensing, and plasmonic waveguides.
Approach & Scientific Outcomes: The basic approach employed in the research is based on surface plasmon resonance (SPR) and localized surface plasmon resonance (LSPR) by utilizing several electromagnetic simulation algorithms such as Finite Difference Time Domain (FDTD) and Rigorous Coupled Wave Analysis (RCWA) there by optimized the results and further the nanostructures are chemically synthesized. The outcomes are culminated in the form of filing patents and publications in high impact factor International journals and International conferences.
Chemical synthesis using solution chemistry to make nanostructures (Nanospheres, Nanostars, Nanorods, Nanopentagon, Nanohexagon, Nanowire etc.).
Spin coated thin films using spin coater
Deposition of thin films using E-beam evaporation, thermal evaporation, organic evaporation, ALD, and PLD.
Performed successful characterization using AFM, TEM, SEM for thin film
Performed successful characterization using TEM, SEM, UV-VIS spectrometer for nanoparticles
Measured particles size and their distribution
Achievements
Certificate of Appreciation
Awarded by IEEE Photonics Society Chapter, Madras for reviewing manuscripts for International Conference on Nanotechnology and Nanophotonics
All India Rank of 29
Graduated Aptitude Test in Engineering (GATE) in Physics securing All India Rank of 29.
All India Rank 79
Qualified Council of Scientific & Industrial Research (CSIR) JRF & NET with All India Rank 79.
National Fellowship/Scholarships
• Junior Research Fellowship (JRF) & Senior Research Fellowship (SRF) awarded by Council of Scientific & Industrial Research (CSIR), Government of India
• Senior Research Fellowship (SRF) awarded by Ministry of Human Resources & Development, Government of India
• Senior Research Fellowship (SRF) awarded by Industrial Research & Development (IRD), IIT Delhi
Plasmonic Modes of Low-Cost Aluminum Nanospheres in Triple Junction Tandem Organic Solar Cells for Enhanced Performance
Journal Progress in Photovoltaic Research and Applications (Journal)
2019
Tandem Organic Solar Cells Containing Plasmonic Nanospheres and Nanostars for Enhancement in Short Circuit Current Density
Optics Express (Journal)
InGaN/GaN Solar Cells with Improved Performance due to Plasmonic and Dielectric Nanostructures
Energy Science and Engineering (Journal)
Plasmonic Enhanced Microcrystalline Solar Cells
Journal of the Optical Society of America (Journal)
Plasmonic Enhancement of Absorption in Bulk-Heterojunction Organic Solar Cells
"Organic Photonic Materials and Devices XXI" & "International Society for Optics and Photonics" (Conference)
2018
Enhanced Absorption in Organic Solar Cells by Employing Plasmonics Nanostructures
IEEE 18th International Conference on Nanotechnology (IEEE-NANO) (Conference)
Plasmonic and Dielectric Nanostructures for Improved Performance of InGaN Thin Film Solar Cells
IEEE 18th International Conference on Nanotechnology (IEEE-NANO) (Conference)
2017
Light Trapping Plasmonic Butterfly-Wing-Shaped Nanostructures for Enhanced Absorption and Efficiency in Organic Solar Cells
Journal of the Optical Society of America (Journal)
Au Nanowire-VO2 Spacer-Au Film Based Optical Switches
Journal of the Optical Society of America (Journal)
2015
Enhanced Performance of InGaN Thin-Film Solar Cells Containing Plasmonic and Dielectric Nanostructures
"Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VIII" & "International Society for Optics and Photonics" (Conference)
PUBLICATION IN PREPARATION
"Plasmonic Nano-Antennas for Highly Sensitive Bulk- and Localized LSPR Sensing," in preparation for submission to the journal "RSC Advances"
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