Profile Details

Create Project

★★★★★

☆☆☆☆☆

USD 50 /hr

★★★★★

☆☆☆☆☆

Hire Dr. Subrata S.

United States

USD 50 /hr

Materials Scientist & Data Analyst | Expert in EIS | Numerical Simulation | Data Visualization

Profile Summary

PhD‑trained materials scientist with 12+ years of research experience spanning device physics, electrochemical systems, and energy‑related materials. I specialize in the numerical simulation and interpretation of J–V characteristics of dye‑sensitized solar cells, as well as electrochemical impedance spectroscopy (EIS) for understanding charge‑transport, recombination, and interfacial mechanisms in functional devices. My background includes designing and executing experiments, modeling device behavior, and translating complex datasets into clear, actionable insights. I am experienced in nanomaterials characterization (SEM, EDS, optical microscopy), surface modification, and structure–property analysis, supported by a strong foundation in chemistry and materials interfaces. My work emphasizes rigorous data interpretation, reproducible workflows, and visually compelling scientific figures that communicate results with clarity and precision. With 40+ peer‑reviewed publications, I am recognized for high‑quality scientific communication, problem‑solving across interdisciplinary teams, and delivering well‑structured analytical outputs. I support clients who need expertise in device modeling, solar‑cell physics, electrochemical analysis, and data visualization for reports, manuscripts, or R&D decision‑making.

Subject Matter Expertise

• ☆ Mathematical Chemistry
• ☆ Materials Science & Engineering
• ☆ Physical Chemistry
• ☆ Analytical Chemistry
• ☆ Electrochemistry
• ☆ Nanotechnology
• ☆ Photochemistry
• ☆ Data Analysis
• ☆ Data Processing
• ☆ Data Exploration
• ☆ Data Visualization
• ☆ Data Manipulation
• ☆ Data Cleaning
• ☆ Statistics
• ☆ Meta-Analysis
• ☆ Correlation Analysis
• ☆ Trend Analysis
• ☆ Python
• ☆ SQL
• ☆ Excel
• ☆ Tableau
• ☆ Peer Review
• ☆ Fact Checking
• ☆ Literature Search
• ☆ Instructional Webinars
• ☆ Skills Training
• ☆ Technical & Scientific Writing
• ☆ Journal Selection
• ☆ Manuscript & Journal Article Writing
• ☆ Experimental Protocols
• ☆ Science Communication
• ☆ Proofreading & Editing
• ☆ Creative Writing

Services

• Writing

Writing Technical Writing

Work Experience

Research Professor

Hongik University - Sejong Campus

June 2023 - Present

Research Professor

University of Skill Enrichment and Technology

January 2022 - May 2023

Research Professor

Korea University

October 2020 - September 2021

Research Professor

Hongik University - Sejong Campus

March 2018 - December 2018

Postdoctoral Fellow

Hongik University - Sejong Campus

March 2016 - March 2017

Education

Ph.D. (Materials Science and Engineering)

Hongik University - Sejong Campus

September 2013 - February 2016

(Advanced Technology and Fusion)

Konkuk University

September 2007 - October 2012

B.Sc. and M.Sc. (Chemistry)

University of Dhaka Faculty of Science

June 1995 - December 2000

H. Sc.

Govt. M. M. Ali College

June 1992 - June 1994

S.S.C.

Mohera Ananda High School

January 1986 - February 1992

Certifications

• CS50x: CS50's Introduction to Computer Science

  HarvardX, an online learning initiative of Harvard University

  https://courses.edx.org/certificates/f68a6eb125e248f3ab01f183197ba435

  February 2021 - Present

• CSE1309x: Python Programming

  UTArlingtonX, an online learning initiative of University of Texas System

  https://courses.edx.org/certificates/b636041175ce4c5eadda2ecce5d646d9

  March 2016 - Present

• Writing in the Sciences

  Stanford Online

  https://prod-cert-bucket.s3.amazonaws.com/downloads/2332118c8f44450ab6652296f7a28269/Certificate.pdf

  November 2014 - Present

• ET3034TUx: Solar Energy

  Delft University of Technology through edX

  https://s3.amazonaws.com/verify.edx.org/downloads/1d29816bc47f43a08a3bae1aaa2a67e0/Certificate.pdf

  December 2013 - Present

Publications

JOURNAL ARTICLE

Subrata Sarker, Hyun Woo Seo, Subarna Rudra, Solima Khanam, Dong Min Kim (2025). Revisiting the Shockley–Queisser Limit: Understanding Solar Cell Efficiency in One Sun and Indoor Environments . The Journal of Physical Chemistry Letters.

Subrata Sarker, Yuda Prima Hardianto, Abdulmajid A. Mirghni, Syed Shaheen Shah, Md. Abdul Aziz (2025). Developing an innovative theoretical model for analyzing cyclic voltammetry in hybrid supercapacitors . Electrochimica Acta.

Subrata Sarker, Yuda Prima Hardianto, Syed Shaheen Shah, Abubakar Dahiru Shuaibu, Mostafa Mohamed, Atif Saeed Alzahrani, Md. Abdul Aziz (2025). Modeling supercapacitors with the simplified Randles circuit: Analyzing electrochemical behavior through cyclic voltammetry and Galvanostatic charge-discharge . Electrochimica Acta.

Subrata Sarker, Subarna Rudra, Hyun Woo Seo, Dong Min Kim (2024). Supercapatteries as Hybrid Electrochemical Energy Storage Devices: Current Status and Future Prospects . Molecules.

Subrata Sarker, Subarna Rudra, Hyun Woo Seo, Dong Min Kim (2024). Supercapatteries as Hybrid Electrochemical Energy Storage Devices: Current Status and Future Prospects . Molecules.

Subrata Sarker, Chang Min Lee, Yeong Beom Kim, Dong Hyun Kim, Tae Wook Kim, Syed Hamad Ullah Shah, Hyun Woo Cho, Tae‐Sung Bae, Seung Min Yu, Yong‐Cheol Kang, et al. (2023). The Role of the Bottom Oxide Layer in Oxide‐Metal‐Oxide (OMO) Electrode for Stretchable Organic Light‐Emitting Diodes . Advanced Materials Interfaces.

Subrata Sarker, Tamanna Islam, Md. Mahedi Hasan, A. J. Saleh Ahammad (2023). Intrinsic Properties of GO/RGO Bilayer Electrodes Dictate Their Inter-/Intralayer Intractability to Modulate Their Capacitance Performance . ACS Omega.

Author Correction: Highly efficient, heat dissipating, stretchable organic light-emitting diodes based on a MoO3/Au/MoO3 electrode with encapsulation <head> <META HTTP-EQUIV="Refresh" CONTENT="0;URL=/servlet/useragent"> </head> . Nature Communications.

Subrata Sarker, A. J. Saleh Ahammad, Tamanna Islam, Md. Mahedi Hasan(2021). Effects of Graphene Oxide and Reduced Graphene Oxide Interlayer Interactions on the Charge Storage Mechanism . ECS Meeting Abstracts. {MA}2021-01. (9). p. 503--503. The Electrochemical Society

Subrata Sarker, A. J. Saleh Ahammad, Md. Mahedi Hasan, Tamanna Islam (2021). Layer by Layer Assembly of Graphene Oxide and Reduced Graphene Oxide for Electrochemical Oxidation of Bisphenol . ECS Meeting Abstracts.

Subrata Sarker, Dae Keun Choi, Dong Hyun Kim, Chang Min Lee, Hassan Hafeez, Jun Su Yang, Hyung Ju Chae, Geon-Woo Jeong, Dong Hyun Choi, Tae Wook Kim, et al. (2021). Highly efficient, heat dissipating, stretchable organic light-emitting diodes based on a MoO3/Au/MoO3 electrode with encapsulation . Nature Communications.

Subrata Sarker, Subarna Rudra, Hyun Woo Seo, Dong Min Kim (2021). Simulation and electrochemical impedance spectroscopy of dye-sensitized solar cells . Journal of Industrial and Engineering Chemistry.

Subrata Sarker, M. Aftabuzzaman, Chunyuan Lu, Hwan Kyu Kim(2021). In-depth understanding of the energy loss and efficiency limit of dye-sensitized solar cells under outdoor and indoor conditions . Journal of Materials Chemistry A. Royal Society of Chemistry ({RSC})

Subrata Sarker, Hyun Woo Seo, Young-Ku Jin, Md. Abdul Aziz, Dong Min Kim (2019). Transparent conducting oxides and their performance as substrates for counter electrodes of dye-sensitized solar cells . Materials Science in Semiconductor Processing.

Sarker, S., Seo, H.W., Jin, Y.-K., Aziz, M.A., Kim, D.M.(2019). Transparent conducting oxides and their performance as substrates for counter electrodes of dye-sensitized solar cells . Materials Science in Semiconductor Processing. 93. p. 28-35.

Ahammad, A.J.S., Pal, P.R., Shah, S.S., Islam, T., Mahedi Hasan, M., Qasem, M.A.A., Odhikari, N., Sarker, S., Kim, D.M., Abdul Aziz, M.(2019). Activated jute carbon paste screen-printed FTO electrodes for nonenzymatic amperometric determination of nitrite . Journal of Electroanalytical Chemistry. 832. p. 368-379.

Rudra, S., Sarker, S., Kim, D.M.(2019). Review on simulation of current–voltage characteristics of dye-sensitized solar cells . Journal of Industrial and Engineering Chemistry.

Subrata Sarker, Dong Min Kim(2018). Measurement and simulation of current-voltage relation in dye-sensitized solar cells with reduced graphene oxide at the counter electrodes . Solar Energy. 176. p. 656--662. Elsevier {BV}

Sarker, S., Kim, D.M.(2018). Measurement and simulation of current-voltage relation in dye-sensitized solar cells with reduced graphene oxide at the counter electrodes . Solar Energy. p. 656-662.

Ahammad, A.J.S., Islam, T., Hasan, M., Mozumder, M.N.I., Karim, R., Odhikari, N., Pal, P.R., Sarker, S., Kim, D.M.(2018). Reduced graphene oxide screen-printed fto as highly sensitive electrodes for simultaneous determination of dopamine and uric acid . Journal of the Electrochemical Society. 165. (5). p. B174-B183.

Subrata Sarker, Ki-Seong Lee, Hyun Woo Seo, Young-Ku Jin, Dong Min Kim (2017). Reduced graphene oxide for Pt-free counter electrodes of dye-sensitized solar cells . Solar Energy.

Sarker, S., Lee, K.-S., Seo, H.W., Jin, Y.-K., Kim, D.M.(2017). Reduced graphene oxide for Pt-free counter electrodes of dye-sensitized solar cells . Solar Energy. 158. p. 42-48.

Sarker, S., Seo, H.W., Seo, D.-W., Kim, D.M.(2017). Electrochemical impedance spectroscopy of dye-sensitized solar cells with different electrode geometry . Journal of Industrial and Engineering Chemistry. 45. p. 56-60.

Seo, H.W., Sarker, S., Kim, D.M.(2017). Electrochemical impedance spectroscopy of dye-sensitized solar cells with post-treated TiO<inf>2</inf> photoelectrodes using hafnium(IV) chloride and titanium(IV) chloride . Journal of Photochemistry and Photobiology A: Chemistry. 332. p. 258-264.

Ahammad, A.J.S., Ullah, M.A., Hoque, M.M., Mamun, M.A., Alam, M.K., Anju, A.N., Islam Mozumder, M.N., Karim, R., Sarker, S., Kim, D.M.(2017). Signal enhancement of hydroquinone and catechol on their simultaneous determination . International Journal of Electrochemical Science. 12. (8). p. 7570-7579.

Sarker, S., Seo, H.W., Bakare, F.O., Aziz, M.A., Kim, D.M.(2016). Facile and rapid preparation of platinum counter electrodes for dye-sensitized solar cells . Journal of Photochemistry and Photobiology A: Chemistry. 321. p. 122-127.

Sarker, S., Seo, H.W., Lee, K.-S., Jin, Y.-K., Ju, H., Kim, D.M.(2015). Exact analytical analysis of current density-voltage curves of dye-sensitized solar cells . Solar Energy. 115. p. 390-395.

Sarker, S., Seo, H.W., Jin, Y.-K., Lee, K.-S., Lee, M., Kim, D.M.(2015). On the Hysteresis of Current Density-Voltage Curves of Dye-sensitized Solar Cells . Electrochimica Acta. 182. p. 493-499.

Sarker, S., Seo, H.W., Kim, D.M.(2014). Calculating current density-voltage curves of dye-sensitized solar cells: A straight-forward approach . Journal of Power Sources. 248. p. 739-744.

Subrata Sarker, A. J. Saleh Ahammad, Hyun Woo Seo, Dong Min Kim (2014). Electrochemical Impedance Spectra of Dye-Sensitized Solar Cells: Fundamentals and Spreadsheet Calculation . International Journal of Photoenergy.

Sarker, S., Ahammad, A.J.S., Seo, H.W., Kim, D.M.(2014). Electrochemical impedance spectra of dye-sensitized solar cells: Fundamentals and spreadsheet calculation . International Journal of Photoenergy. 2014.

Sarker, S., Seo, H.W., Kim, D.M.(2013). Electrochemical impedance spectroscopy of dye-sensitized solar cells with thermally degraded N719 loaded TiO<inf>2</inf> . Chemical Physics Letters. 585. p. 193-197.

Nath, N.C.D., Sarker, S., Rahman, M.M., Lee, H.J., Kim, Y.J., Lee, J.-J.(2013). A facile template-free chemical synthesis of poly(thionine) nanowires . Chemical Physics Letters. 559. p. 56-60.

Lee, G.I., Nath, N.C.D., Sarker, S., Shin, W.H., Ahammad, A.J.S., Kang, J.K., Lee, J.-J.(2012). Fermi energy level tuning for high performance dye sensitized solar cells using sp ² selective nitrogen-doped carbon nanotube channels . Physical Chemistry Chemical Physics. 14. (15). p. 5255-5259.

Lim, S.-S., Sarker, S., Yoon, S., Nath, N.C.D., Kim, Y.J., Jeon, H.B., Lee, J.-J.(2012). A series of N-Alkylimidazolium propylhexanamide iodide for dye-sensitized solar cells . Bulletin of the Korean Chemical Society. 33. (5). p. 1480-1484.

Sarker, Subrata, Nath, Narayan Chandra Deb, Ahammad, A. J. Saleh, Rahman, Md Mahbubur, Lim, Sung-Su, Choi, Won-Youl, Lee, Jae-Joon(2012). Carbon Nanotubes on Fluorine-Doped Tin Oxide for Fabrication of Dye-Sensitized Solar Cells at Low Temperature Condition . Journal of Nanoscience and Nanotechnology. 12. (7). p. 5373-5380.

Nath, N.C.D., Ahammad, A.J.S., Sarker, S., Rahman, M.M., Lim, S.-S., Choi, W.-Y., Lee, J.-J.(2012). Carbon nanotubes on fluorine-doped tin oxide for fabrication of dye-sensitized solar cells at low temperature condition . Journal of Nanoscience and Nanotechnology. 12. (7). p. 5373-5380.

Sarker, Subrata, Nath, Narayan Chandra Deb, Rahman, Md Mahbubur, Lim, Sung-Su, Ahammad, A. J. Saleh, Choi, Won-Youl, Lee, Jae-Joon(2012). TiO2 Paste Formulation for Crack-Free Mesoporous Nanocrystalline Film of Dye-Sensitized Solar Cells . Journal of Nanoscience and Nanotechnology. 12. (7). p. 5361-5366.

Sarker, S., Nath, N.C.D., Rahman, M.M., Lim, S.-S., Ahammad, A.J.S., Choi, W.-Y., Lee, J.-J.(2012). TiO <inf>2</inf> paste formulation for crack-free mesoporous nanocrystalline film of dye-sensitized solar cells . Journal of Nanoscience and Nanotechnology. 12. (7). p. 5361-5366.

Nath, N.C.D., Sarker, S., Saleh Ahammad, A.J., Lee, J.-J.(2012). Spatial arrangement of carbon nanotubes in TiO <inf>2</inf> photoelectrodes to enhance the efficiency of dye-sensitized solar cells . Physical Chemistry Chemical Physics. 14. (13). p. 4333-4338.

Mee Jung, Y., Park, Y., Sarker, S., Lee, J.-J., Dembereldorj, U., Joo, S.-W.(2011). Surface-induced thermal decomposition of [Ru(dcbpyH)<inf>2</inf>-(CN) <inf>2</inf>] on nanocrystalline TiO<inf>2</inf> surfaces: Temperature-dependent infrared spectroscopy and two-dimensional correlation analysis . Solar Energy Materials and Solar Cells. 95. (1). p. 326-331.

Saleh Ahammad, A.J., Sarker, S., Lee, J.-J.(2011). Immobilization of horseradish peroxidase onto a gold-nanoparticle-adsorbed poly(thionine) film for the construction of a hydrogen peroxide biosensor . Journal of Nanoscience and Nanotechnology. 11. (7). p. 5670-5675.

Sarker, Subrata, Lee, Jae Kwan, Nath, Narayan Chandra Deb, Cha, Eun Hee, Park, Hyung Soon, Jeong, Woo-Sung, Hong, Seok-Ho, Lee, Jae-Joon(2010). Effects of Polyaniline Additive in Solvent-Free Ionic Liquid Electrolyte for Dye-Sensitized Solar Cell . Bulletin of the Korean Chemical Society. 31. (11). p. 3411-3414.

Lee, J.K., Nath, N.C.D., Cha, E.H., Sarker, S., Park, H.S., Jeong, W.-S., Hong, S.-H., Lee, J.-J.(2010). Effects of polyaniline additive in solvent-free ionic liquid electrolyte for dye-sensitized solar cell . Bulletin of the Korean Chemical Society. 31. (11). p. 3411-3414.

Seo, D.-W., Sarker, S., Nath, N.C.D., Choi, S.-W., Ahammad, A.J.S., Lee, J.-J., Kim, W.-G.(2010). Synthesis of a novel imidazolium-based electrolytes and application for dye-sensitized solar cells . Electrochimica Acta. 55. (4). p. 1483-1488.

Park, Y., Mee Jung, Y., Sarker, S., Lee, J.-J., Lee, Y., Lee, K., Jin Oh, J., Joo, S.-W.(2010). Temperature-dependent infrared spectrum of (Bu<inf>4</inf>N)<inf>2</inf>[Ru(dcbpyH)<inf>2</inf>-(NCS)<inf>2</inf>] on nanocrystalline TiO<inf>2</inf> surfaces . Solar Energy Materials and Solar Cells. 94. (5). p. 857-864.

Saleh Ahammad, A.J., Sarker, S., Aminur Rahman, M., Lee, J.-J.(2010). Simultaneous determination of hydroquinone and catechol at an activated glassy carbon electrode . Electroanalysis. 22. (6). p. 694-700.

Narayan Chandra Deb Nath, Subrata Sarker, A. J. Saleh Ahammad, Jae-Joon Lee, 2012, 'Spatial arrangement of carbon nanotubes in TiO2 photoelectrodes to enhance the efficiency of dye-sensitized solar cells', <i>Physical Chemistry Chemical Physics</i>, vol. 14, no. 13 .

Young Mee Jung, Yeonju Park, Subrata Sarker, Jae-Joon Lee, Uuriintuya Dembereldorj, Sang-Woo Joo, 2011, 'Surface-induced thermal decomposition of [Ru(dcbpyH)2-(CN)2] on nanocrystalline TiO2 surfaces: Temperature-dependent infrared spectroscopy and two-dimensional correlation analysis', <i>Solar Energy Materials and Solar Cells</i>, vol. 95, no. 1, pp. 326-331 .

Dong-Wan Seo, Subrata Sarker, Narayan Chandra Deb Nath, Seung-Woo Choi, A.J. Saleh Ahammad, Jae-Joon Lee, Whan-Gi Kim, 2010, 'Synthesis of a novel imidazolium-based electrolytes and application for dye-sensitized solar cells', <i>Electrochimica Acta</i>, vol. 55, no. 4 .

Yeonju Park, Young Mee Jung, Subrata Sarker, Jae-Joon Lee, Yunhee Lee, Kangtaek Lee, Jung Jin Oh, Sang-Woo Joo, 2010, 'Temperature-dependent infrared spectrum of (Bu4N)2[Ru(dcbpyH)2-(NCS)2] on nanocrystalline TiO2 surfaces', <i>Solar Energy Materials and Solar Cells</i>, vol. 94, no. 5, pp. 857-864 .

Sung-Su Lim, Subrata Sarker, Sun-Young Yoon, Narayan Chandra Deb Nath, Young-Jun Kim, Heung-Bae Jeon, Jae-Joon Lee, 2012, 'A Series of N-Alkylimidazolium Propylhexanamide Iodide for Dye-Sensitized Solar Cells', <i>Bulletin of the Korean Chemical Society</i>, vol. 33, no. 5 .

A. J. Saleh Ahammad, Subrata Sarker, Md Aminur Rahman, Jae-Joon Lee, 2010, 'Simultaneous Determination of Hydroquinone and Catechol at an Activated Glassy Carbon Electrode', <i>Electroanalysis</i>, vol. 22, no. 6, pp. 694-700 .

Narayan Chandra Deb Nath, Subrata Sarker, Md. Mahbubur Rahman, Ho Joon Lee, Young Jun Kim, Jae-Joon Lee, 2013, 'A facile template-free chemical synthesis of poly(thionine) nanowires', <i>Chemical Physics Letters</i>, vol. 559 .

Ga In Lee, Narayan Chandra Deb Nath, Subrata Sarker, Weon Ho Shin, A. J. Saleh Ahammad, Jeung Ku Kang, Jae-Joon Lee, 2012, 'Fermi energy level tuning for high performance dye sensitized solar cells using sp2 selective nitrogen-doped carbon nanotube channels', <i>Physical Chemistry Chemical Physics</i>, vol. 14, no. 15 .

A. J. Saleh Ahammad, Subrata Sarker, Jae-Joon Lee, 2011, 'Immobilization of Horseradish Peroxidase onto a Gold-Nanoparticle-Adsorbed Poly(thionine) Film for the Construction of a Hydrogen Peroxide Biosensor', <i>Journal of Nanoscience and Nanotechnology</i>, vol. 11, no. 7, pp. 5670-5675 .

PREPRINT

Subrata Sarker, Subarna Rudra, Hyun Woo Seo, Dong Min Kim (2023). Supercapatteries as Hybrid Electrochemical Energy Storage Devices: Current Status and Future Prospects .

CONFERENCE PAPER

Jin, Y.-K., Sarker, S., Lee, K.-S., Seo, H.W., Kim, D.M.(2016). Piezoelectric materials for high performance energy harvesting devices . 2016 Pan Pacific Microelectronics Symposium, Pan Pacific 2016.

WORKING PAPER

Supercapatteries as Hybrid Electrochemical Energy Storage Devices: Current Status and Future Prospects .