Ujjwal K. Das

Ujjwal K. Das

Senior Scientist: Institute of Energy Conversion

E-mail: ukdas@udel.edu

Phone: 302-831-3523

Education: Ph.D. (Physics) – Jadavpur University, India

Affiliations: Department of Materials Science and Engineering, Department of Electrical and Computer Engineering

Google Scholar:  https://scholar.google.com/citations?user=MG5YtkcAAAAJ&hl=en

Dr. Ujjwal Das works on solar photovoltaic devices based on broad range of materials system: wafer silicon, thin film amorphous silicon, polycrystalline cadmium telluride and organic-inorganic hybrid perovskite thin films. He joined IEC in 2004 and currently manages and oversees research on IEC’s Si solar cell program.

Research Interests

  • Thin film growth and deposition processes for high throughput manufacturing
  • Defect passivation for Si, CdTe and Perovskite based solar cells
  • Carrier selective contacts through interface engineering
  • Advanced device design, modeling and development of high efficiency solar cells
  • Long-term reliability studies of solar cells

Featured Publications

  1. U. K. Das, R. Theisen, A. Hua, A. Upadhyaya, I. Lam, T. K. Mouri, N. Jiang, D. Hauschild, L. Weinhardt, W. Yang, A. Rohatgi, and C. Heske, “Efficient passivation of n-type and p-type silicon surface defects by hydrogen sulfide gas reaction,” Journal of Physics: Condensed Matter 33, 464002 (2021). DOI: 10.1088/1361-648X/ac1ec8
  2. A.J. Harding, A. G. Kuba, B. E. McCandless, U. K. Das, K. D. Dobson, B. A. Ogunnaike, and W. N. Shafarman, “The growth of methylammonium lead iodide perovskites by close space vapor transport,” RSC Advances 10, 16125 (2020). https://doi.org/10.1039/D0RA01640C
  3. U. K. Das, M. Z. Burrows, M. Lu, S. Bowden, and R. W. Birkmire, “Surface passivation and heterojunction cells on Si (100) and (111) wafers using dc and rf plasma deposited Si:H thin films,” Applied Physics Letters 92, 063504 (2008). https://doi.org/10.1063/1.2857465
  4. M. Lu, S. Bowden, U. Das, and R. Birkmire, “Interdigitated back contact silicon heterojunction solar cell and the effect of front surface passivation,” Applied Physics Letters 91, 063507 (2007). https://doi.org/10.1063/1.2768635
  5. U. K. Das, T. Yasuda, and S. Yamasaki, “Fast diffusion of H and creation of dangling bonds in hydrogenated amorphous silicon studied by in situ ESR,” Physical Review Letters 85, 2324 (2000). https://doi.org/10.1103/PhysRevLett.85.2324

View full list of publications in google scholar:  https://scholar.google.com/citations?user=MG5YtkcAAAAJ&hl=en