Subhendu Guha

Subhendu Guha is an Indian American photovoltaic scientist who invented flexible Solar shingles (photovoltaic shingles).[2] He is known for his pioneering work in Amorphous silicon and Nanocrystalline silicon.[3][4] In 1998 Dr Guha invented flexible solar cells that can be directly applied to residential roof tops.[5]

Subhendu Guha
Born1942
Dacca, India (now in Bangladesh)
NationalityIndian-American
EducationPresidency College, Kolkata
Alma materUniversity of Calcutta
Known forSolar Cells and Panels, Amorphous silicon, Nanocrystalline silicon, Flexible Solar shingles and Laminates
Spouse(s)Jayashree[1]

Early life & career

Subhendu Guha was born in 1942 in Dacca, India (now in Bangladesh). He graduated from Presidency College, Kolkata and obtained Ph.D. from University of Calcutta in 1968. He joined Tata Institute of Fundamental Research where he carried out research on physics of semi-conductors. He developed a novel method for depositing Amorphous silicon that has been used by researchers and manufacturers all over the world. He was a senior research fellow at University of Sheffield, England during 1974–1975.

He joined a US-based company Energy Conversion Devices as a senior research scientist in 1982 and later became vice-president, Photovoltaic and Information and worked on different aspects of solar cells. Subsequently, he joined United Solar Ovonic Corporation as executive vice-president and later became president and chairman.[6]

Guha led a team of scientists and engineers to manufacture using a roll-to-roll process photovoltaic laminates eighteen feet long and one foot wide, The laminates were lightweight, flexible and easy to install on conventional roofs.[7]

He served as a member of the advisory committee to the Physics Department of Colorado School of Mines and Center for Photonic Nanomaterials of University of Michigan. He was on the board of directors of Solar Energy Industries Association and Engineering Society of Detroit, and on the advisory committee of National Center for Photovoltaic, Golden, Colorado.[8]

After retirement, he founded ESGEE International offering advice and consulting to industries and other organizations; he also serves as a Distinguished Visiting Professor, IIEST, Shibpur. India

Awards & recognition
  • Bright Light Award from U.S. Department of Energy[9]
  • PVSEC 2009 award for outstanding contribution to science and technology of photovoltaic[10]
  • Best of what's new by Popular Science Magazine[11]
  • Best invention in the Environment Category by Discover Magazine[12]
  • World Technology Award in Energy Category 2005[13]
  • Best of the Best (Sherar Shera) Bengali award 2014 by ABP Ananda for contribution to science[14]
  • India Today magazine listed Dr Guha as one of the Thought Leaders among non-resident Indians

Publications

Dr Guha has more than 250 publications and over 30 US patents.[15][16]

Notable research
  • Invented a new process for depositing thin film of amorphous silicon which is now being used by industries all over the world[17]
  • Led a team that developed Amorphous and Microcrystalline Silicon-based Photovoltaic Laminates.[18]
  • World's highest efficiency triple-junction amorphous silicon cell using proprietary germanium grading and microcrystalline p-layer[19]
  • Hydrogen dilution profiling to get high efficiency[20]
  • Correlation between void density and material quality[21]

References
  2. "Solar Genius - Solar Shingles". Solar America. 2 July 2014.
  3. "The History of Solar" (PDF). www1.eere.energy.gov.
  4. Guha, Subhendu (1 September 1998). "Amorphous silicon alloy photovoltaic technology and applications". Renewable Energy. 15 (1–4): 189–194. doi:10.1016/S0960-1481(98)00152-9.
  5. "Subhendu Guha". www.historycommons.org.
  6. Smith, Zachary Alden; Taylor, Katrina D. (2008). Renewable and Alternative Energy Resources: A Reference Handbook. ABC-CLIO. p. 167. ISBN 9781598840896. shubhendu Guha.
  7. Oxlade, Chris (2012). Solar Power. Raintree Publishers. ISBN 9781406229431.
  8. "Subhendu Guha Innovative Lives Presentation · SOVA". sova.si.edu.
  9. Council, National Research; Affairs, Policy and Global; Policy, Policy and Global; Initiatives, Committee on Competing in the 21st Century: Best Practice in State and Regional Innovation (2011). The Future of Photovoltaics Manufacturing in the United States: Summary of Two Symposia. National Academies Press. ISBN 9780309224857.
  10. "Awards". PVSEC (in Japanese).
  11. "Popular Science". 245. July 1994: 36. Cite journal requires |journal= (help)
  12. "Discover Magazine". 11. July 1995: 20. Cite journal requires |journal= (help)
  13. "The 2005 World Technology Summit & Awards". wtn.net.
  14. "MAGNIFICENT NINE IN 10TH YEAR OF ABP ANANDA SERA BANGALI AWARDS". telegraphindia.com. 28 July 2014.
  15. "Subhendu Guha". ResearchGate.
  16. "Subhendu Guha Inventions, Patents and Patent Applications - Justia Patents Search". patents.justia.com.
  17. Guha, Subhendu; Narasimhan, K.L.; Pietruszko, S.M. (1981). "On light-induced effects in amorphous hydrogenated silicon": 52, 859. Cite journal requires |journal= (help)
  18. Deng, X.; Ovshinsky, H. C.; Izu, M.; Ovshinsky, S. R.; Hoffman, K.; Glatfelter, T.; Banerjee, A.; Yang, J.; Guha, S. (1994). "Amorphous Silicon Alloy Photovoltaic Technology - from R&D to Production". MRS Online Proceedings Library Archive. 336. doi:10.1557/PROC-336-645. ISSN 1946-4274.
  19. Guha, Subhendu; Jeffrey, Yang; Banerjee, Arindam (1997). "A record setting amorphous silicon alloy triple-junction solar cell with 14.6% initial and 12.8% stable efficiencies, NREL/SNL Photovoltaics Program Review". Cite journal requires |journal= (help)
  20. Guha, Subhendu (2004). "Hydrogen dilution profiling for hydrogenated microcrystalline silicon solar cells" (Applied physics letters 85): 1955–1957. Cite journal requires |journal= (help)
  21. Guha, Subhendu; Yang, Jeffrey; Yan, Baojie (1 December 2013). "High efficiency multi-junction thin film silicon cells incorporating nanocrystalline silicon". Solar Energy Materials and Solar Cells. 119: 1–11. doi:10.1016/j.solmat.2013.03.036. ISSN 0927-0248.
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