Avijit Saha | Biomedical Imaging | Best Researcher Award

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Dr. Avijit Saha | Biomedical Imaging | Best Researcher Award

Dr. Technical university of Dresden , Germany

Avijit Saha is a Materials Scientist with extensive expertise in semiconductor quantum dots (QDs), focusing on their optical, electronic, and magnetic properties for optoelectronic applications. His research includes developing RoHS-compliant QDs and innovative UV/NIR sensors. Saha has worked as a Marie Curie Fellow at TU Dresden, and previously at ICFO-Barcelona and IRIG CEA Grenoble, achieving breakthroughs in QD-based devices and sustainability. He holds a PhD from JNCASR, India, and has received numerous awards, including the Marie Skłodowska-Curie Fellowship and ‘SEAL of Excellence’ from the European Commission. Saha also mentors students and has experience in teaching and supervising research projects.

 

Professional Profiles:

Google scholar

Education 🎓

PhD in Materials Science, Quantum Dot Lab, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), India (Jan 2012-May 2017)
Thesis: Interface Engineering of Quantum Dot Heterostructures for Optoelectronic Applications and/or Magnetic PropertiesMaster’s Degree in Physics, Department of Physics, Indian Institute of Technology (IIT), Madras, India (2011)
Thesis: Synthesis, Optical and Magnetic Properties of Ni Doped and (Na, Ni) Co-doped ZnO NanoparticlesBachelor’s Degree in Physics (Honors), Burdwan Raj College, The University of Burdwan, India (2009)

Research Experience & Key Achievements 🔬

  • Marie Curie Fellow (June 2023-Present), TU Dresden, Germany
    Leading research on SWIR technology advancements using low-toxic semiconductor QDs, developing record PLQY (>50%) SWIR emitting Cd/Pb-free QDs with very low FWHM (102meV), and exploring PbS QDs in SWIR photodetectors.
  • Postdoctoral Researcher (Dec 2021-May 2023), STEP Group, IRIG, CEA Grenoble, France
    Developed UV, blue, and NIR-emitting QDs for LED applications in collaboration with SAMSUNG, prepared grant proposals, and provided monthly research updates.
  • Postdoctoral Researcher (July 2017-Oct 2021), Functional Optoelectronic Nanomaterials Group, ICFO-Barcelona, Spain
    Led the design of QD-based UV enhanced Si-CMOS sensors and QD-based UV band discriminators, synthesized NIR-efficient kesterite-based quaternary QDs, and PbS QDs for amplified spontaneous emission applications.
  • Doctoral Student (Jan 2012-May 2017), Quantum Dot Lab, JNCASR, India
    Engineered QD interfaces for efficient light emission from CdSe/CdS and CdTe/CdS heterostructures, demonstrated anomalous exchange bias effects in magnetic/semiconductor heterostructures, and synthesized uniform doped QDs using controlled diffusion mechanisms.

Scientific and Technical Skills 🛠️

Material Synthesis: RoHS compliant QDs (InP, Ga2S3, CuInZn(S/Se), AgInTe2, etc.), Pb/Cd-based QDs, diluted magnetic semiconductors, and hybrid magnetic/semiconductor heterostructures.Device Fabrication: Semiconductor processing cleanroom, fabrication of LEDs, photodetectors, FETs, solar cells, sensors, and measurement of electrical and optoelectronic properties.Characterizations: XRD, SEM, XPS, TEM, HRTEM, STEM-EDAX, ICP-OES, TGA, UV-VIS absorption, PL-spectroscopy, TRPL, Raman spectroscopy, FTIR, NMR, XAFS, and UPS.

Awards and Fellowships 🏆

Marie Skłodowska-Curie Actions (MSCA) Postdoctoral Fellowship (2022)‘SEAL of Excellence’ from European Commission (Horizon Europe, 2022)Junior Research Fellowship in Physical Sciences under CSIR fellowship scheme (2012)Eligibility for Lectureship (NET) in Physical Science (CSIR-UGC NET, 2013)

Supervising and Mentoring Activities 👩‍🏫

Instructed a course on ‘Efficiency of Photovoltaic Solar Cells’ at ICFO-Barcelona.Co-instructed practical classes for Masters Students at TU Dresden.Teaching Assistant for Quantum Chemistry and Chemical Bonding at JNCASR.Mentored one PhD, one Master’s, and six visiting students in research projects.Lab Mentor for Integrated PhD Students at JNCASR, Bangalore, India.

Strengths for the Award:

  1. Innovative Research in Sustainable Technologies:
    • Saha has worked on RoHS compliant, non-toxic quantum dots (QDs), emphasizing sustainable and environmentally friendly materials. This aligns well with community-focused research impacting public health and safety.
    • His work on enhancing UV sensitivity for CMOS sensors and developing environmentally friendly UV-Blue emitting QDs for LEDs demonstrates a commitment to improving technology in a sustainable manner.
  2. Extensive Research and Development Experience:
    • His roles span from doctoral research to postdoctoral positions across prestigious institutions and industries, including collaborations with major companies like SAMSUNG.
    • His research has led to breakthroughs in various optoelectronic applications, showcasing a deep understanding and innovative approach to materials science.
  3. Notable Achievements and Recognition:
    • Receipt of the Marie Skłodowska-Curie fellowship, SEAL of Excellence, and other awards highlights his exceptional contributions and recognition in the field.
    • His research outputs, including the development of high-performance QDs and advancements in optoelectronic devices, reflect a high impact in the scientific community.
  4. Leadership and Mentoring:
    • Saha has demonstrated leadership through mentoring students and instructing courses, contributing to the academic and professional growth of the next generation of researchers.
  5. Diverse Technical Skills:
    • Proficient in a wide range of materials synthesis, device fabrication, and characterization techniques, which indicates a comprehensive skill set that supports impactful research.

Areas for Improvement:

  1. Community Engagement:
    • While his research is innovative and impactful, additional emphasis on direct community engagement or outreach activities would strengthen his application for a community-focused award. Demonstrating how his research directly benefits or involves the community could be beneficial.
  2. Documentation of Community Impact:
    • Providing concrete examples or case studies where his work has led to tangible community benefits or collaborations with community-based organizations would strengthen his case.

Conclusion:

Avijit Saha’s extensive research achievements, particularly in developing sustainable and environmentally friendly technologies, make him a strong candidate for the Research for Community Impact Award. His innovative work aligns well with the goals of impacting communities positively through scientific advancement. Emphasizing direct community engagement and providing more detailed examples of how his research has benefited or involved the community could further enhance his suitability for the award.

✍️Publications Top Note :

Near-unity quantum yield in semiconducting nanostructures: Structural understanding leading to energy efficient applications
Authors: A Saha, KV Chellappan, KS Narayan, J Ghatak, R Datta, R Viswanatha
Journal: The Journal of Physical Chemistry Letters
Volume: 4(20), Pages: 3544-3549
Citations: 72
Year: 2013

Uniform doping in quantum-dots-based dilute magnetic semiconductor
Authors: A Saha, A Shetty, AR Pavan, S Chattopadhyay, T Shibata, R Viswanatha
Journal: The Journal of Physical Chemistry Letters
Volume: 7(13), Pages: 2420-2428
Citations: 50
Year: 2016

Ag2ZnSnS4 Nanocrystals Expand the Availability of RoHS Compliant Colloidal Quantum Dots
Authors: A Saha, A Figueroba, G Konstantatos
Journal: Chemistry of Materials
Volume: 32, Pages: 2148-2155
Citations: 30
Year: 2020

Diffusion doping in quantum dots: bond strength and diffusivity
Authors: A Saha, M Makkar, A Shetty, K Gahlot, AR Pavan, R Viswanatha
Journal: Nanoscale
Volume: 9(8), Pages: 2806-2813
Citations: 30
Year: 2017

Visible‐blind ZnMgO Colloidal Quantum Dot Downconverters expand Silicon CMOS Sensors Spectral Coverage into Ultraviolet and enable UV Band Discrimination
Authors: A Saha, G Kumar, S Pradhan, G Dash, R Viswanatha, G Konstantatos
Journal: Advanced Materials
DOI: 10.1002/adma.202109498
Citations: 23
Year: 2022

Magnetism at the Interface of Magnetic Oxide and Nonmagnetic Semiconductor Quantum Dots
Authors: A Saha, R Viswanatha
Journal: ACS Nano
Volume: 11(3), Pages: 3347-3354
Citations: 23
Year: 2017

Ligand assisted digestion and formation of monodisperse FeCoS2 nanocrystals
Authors: A Shetty, A Saha, M Makkar, R Viswanatha
Journal: Physical Chemistry Chemical Physics
Volume: 18(37), Pages: 25887-25892
Citations: 18
Year: 2016

Ag2ZnSnS4-ZnS core-shell colloidal quantum dots: a near-infrared luminescent material based on environmentally-friendly elements
Authors: A Saha, G Konstantatos
Journal: Journal of Materials Chemistry C
DOI: 10.1039/D1TC00421B
Citations: 14
Year: 2021

Interface Modeling Leading to Giant Exchange Bias from the CoO/CoFe2O4 Quantum Dot Heterostructure
Authors: A Saha, S Sohoni, R Viswanatha
Journal: The Journal of Physical Chemistry C
DOI: 10.1021/acs.jpcc.8b11124
Citations: 13
Year: 2019

Ultra-Thin Infrared Optical Gain Medium and Optically-Pumped Stimulated Emission in PbS Colloidal Quantum Dot LEDs
Authors: N Taghipour, I Tanriover, M Dalmases, GL Whitworth, C Graham, A Saha, …
Journal: Advanced Functional Materials
DOI: 10.1002/adfm.202200832
Citations: 12
Year: 2022

Volume and concentration scaling of magnetism in dilute magnetic semiconductor quantum dots
Authors: A Saha, R Viswanatha
Journal: The Journal of Physical Chemistry C
Volume: 121(39), Pages: 21790-21796
Citations: 11
Year: 2017

Core–Shell to Doped Quantum Dots: Evolution of the Local Environment Using XAFS
Authors: A Saha, S Chattopadhyay, T Shibata, R Viswanatha
Journal: The Journal of Physical Chemistry C
Volume: 120(33), Pages: 18945-18951
Citations: 11
Year: 2016

The curious case of CdTe/CdS: photoabsorption versus photoemission
Authors: A Saha, S Chattopadhyay, T Shibata, R Viswanatha
Journal: Journal of Materials Chemistry C
Volume: 2(20), Pages: 3868-3872
Citations: 10
Year: 2014

Thermodynamics of Dual Doping in Quantum Dots
Authors: M Makkar, A Saha, S Khalid, R Viswanatha
Journal: The Journal of Physical Chemistry Letters
Volume: 10, Pages: 1992-1998
Citations: 7
Year: 2019

Gallium Sulfide Quantum Dots with Zinc Sulfide and Alumina Shells Showing Efficient Deep Blue Emission
Authors: A Saha, R Yadav, D Aldakov, P Reiss
Journal: Angewandte Chemie International Edition
Volume: 62(45), Article: e202311317
Citations: 2
Year: 2023

Water‐Soluble Alumina‐Coated Indium Phosphide Core–Shell Quantum Dots with Efficient Deep‐Red Emission Beyond 700 nm
Authors: A Saha, R Yadav, C Rivaux, D Aldakov, P Reiss
Journal: Small
Article: 2404426
Year: 2024

Exciton Dynamics in Mn/Ni Dual‐doped Semiconductor Quantum Dots
Authors: A Saha, K Gahlot, R Viswanatha
Journal: ChemNanoMat
Article: e202100457
Year: 2022

Interface engineering of quantum dot heterostructures for optoelectronic applications and/or magnetic properties
Author: A Saha
Institution: Jawaharlal Nehru Centre for Advanced Scientific Research
Year: 2016

Cd-based-chalcogenide/CdS core-shell nanomaterial, defective/defect-free core nanocrystal, methods and applications thereof
Authors: Ranjani Viswanatha, Avijit Saha, Kavassery Sureswaran Narayan, Kishore …
Patent Number: WO2014147555 A2
Year: 2015