Steven DiGregorio

Postdoctoral Researcher

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Postdoctoral Researcher

sdigre@sandia.gov

Biography

Steven DiGregorio is a postdoctoral researcher in the Photovoltaic Systems Evaluation Laboratory (PSEL) at Sandia National Laboratories. His current research focuses on the characterization and statistical analysis of PV connector failures and the quantification of cell and glass cracking due to hail impacts on PV modules. Prior to his current role, Dr. DiGregorio developed interdisciplinary expertise in material science, chemistry, and mechanical and electrical engineering through his research on particle-free reactive silver inks. This research led to a 90% reduction in silver consumption in silicon heterojunction (SHJ) solar cells and the development of a reliable microfluidic printing process for photovoltaic metallization with reactive silver inks.

Education

Dr. DiGregorio received his bachelor’s degree in mechanical engineering from the New Mexico Institute of Mining and Technology and both his master’s and PhD degrees in mechanical engineering from the Colorado School of Mines.

Publications

  • Hansen, C., Digregorio, S.J., Mann, D., Crimmins, J., & Crimmins, J. (2024). Non-contact inspection of PV system fasteners [Poster]. 10.2172/2540399 Publication ID: 150124
  • Digregorio, S.J., Braid, J.L., Hartley, J.Y., Sillerud, C., & Sillerud, C. (2024). EL Image Analysis of Laboratory Hail Impacted PV Modules [Conference Poster]. 10.2172/2584993 Publication ID: 152324
  • Hartley, J.Y., Digregorio, S.J., Weil, J., Zhang, K., Braid, J.L., Trippel, L., & Trippel, L. (2024). Analyzing Hail Impact-Induced Glass Fracture in Photovoltaic Modules Using High Speed Video and Computational Simulation [Presentation]. Conference Record of the IEEE Photovoltaic Specialists Conference. 10.2172/2585226 Publication ID: 152728
  • Digregorio, S.J., Braid, J.L., Shimizu, M.A., Hartley, J.Y., & Hartley, J.Y. (2024). Laboratory Hail Damage of Photovoltaic Modules: Electroluminescence and High-speed Digital Image Correlation Analysis [Conference Paper]. Conference Record of the IEEE Photovoltaic Specialists Conference. 10.2172/2585463 Publication ID: 152832
  • King, M.P., Massey, G., Silva, A., Cannon, E., Shaneyfelt, M.R., Loveless, T., Ballast, J., Cabanas-Holmen, M., Digregorio, S.J., Rice, W.C., Draper, B.L., Oldgies, P., Rodbell, K., & Rodbell, K. (2018). TID-Induced Leakage and Drive Characteristics of Planar 22-nm PDSOI and 14-nm Bulk and Quasi-SOI FinFET Devices [Conference Poster]. https://www.osti.gov/biblio/1570155 Publication ID: 63092
  • King, M.P., Silva, A.I., Digregorio, S.J., Rice, W.C., Massey, J.G., Cannon, E.H., Ballast, J., Cabanas-Holmen, M., Oldgies, P., Rodbell, K., Draper, B.L., & Draper, B.L. (2018). Leakage and Drive Characteristics of Planar 22-nm Partially-Depleted Silicon-on-Insulator and 14-nm Bulk and Quasi-Silicon-on-Insulator FinFET Devices [Conference Poster]. https://www.osti.gov/biblio/1513706 Publication ID: 59381
6 publications