Over five years research and development experience in silicon wafer based solar photovoltaics. Specialized in characterization of silicon wafer and solar cells. Developed and establish methods for the measurement of diffusion length in higher lifetime wafers, front and back surface recombination in silicon solar cell.

1. CURRICULUM VITAE
ASHOK KUMAR SHARMA
Affiliation:
Crystalline Silicon Solar Cell Group
National Physical Laboratory
Dr. K. S. Krishnan Road
New Delhi 110012 (India)
Tel: +91-9871087040, +91-11-45608379, +91-11-28745860
Email: anamics.ak@gmail.com, sharmaak@nplindia.org
PERSONAL DETAILS
Date of Birth: 23 March 1982
Citizenship: India
Marital Status: Married (1 startup)
Language: Hindi, English
Abode: SRSA-12, NPL Colony, New Rajinder Nagar, Delhi-110060
ACADEMICS
Ph.D. Physics (Silicon Solar Cells), (Expected submission; May 2011)
Jamia Millia Islamia, New Delhi & National Physical Laboratory, New Delhi
Thesis Title: Studies on the enhancement of optical absorption and reduction
in minority carrier recombination in the silicon solar cells
M.Sc. Physics (Materials Science), July 2004
Jamia Millia Islamia, New Delhi (www.jmi.ac.in)
Thesis Title: Conductivity measurement in conjugated polymer (poly-pyrrole)
B.Sc. (Physics, Chemistry, Maths), July 2002
C.C.S. University, Meerut, U.P (www.ccsuniversity.org)
PROFESSIONAL EXPERIENCE
Research & Development
National Physical Laboratory, New Delhi (www.nplindia.org)
Research Intern (April 2005 - April 2007)
Research Fellow (April 2007 - April 2008)
Senior Research Fellow (April 2008 - present)
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2. Academic Training
TERI University, New Delhi (www.teriuniversity.org)
Adjunct faculty – Since October 2010
Solar Photovoltaics (M.Tech. - REEM)
M. B. (P.G) College, Dadri, G.B. Nagar
Faculty Member, Physics Department (August 2004 – April 2005)
Physics UG Classes
AWARDS
CSIR Diamond Jubilee Research Intern Award in Physics (2005)
CSIR Senior Research Fellowship in Applied Physics (2008)
RESEARCH CONTRIBUTIONS
Method for measurement of FSRV in conventional Silicon solar cell
Method for diffusion length measurement in virgin silicon wafer
Application of PCG method for measurement of diffusion length and BSRV
Porous silicon as ARC: growth kinetics and optical confinement studies
CONFERENCES & COURSES
“Advances in Photovoltaics”, IWPSD-2005, National Physical Laboratory, New Delhi,
India, December 12, 2005.
International Workshop on the Physics of Semiconductor Devices (IWPSD)
National Physical Laboratory New Delhi, India, December 13 -17, 2005
International Materials Research Congress Symposium (IMRC), Cancun- Mexico,
August 20-24, 2006
Materials Research Society of India Symposium (MRSI), National Physical
Laboratory New Delhi- India, February 12 -14, 2007
International Conference on luminescence and its application (ICLA), National
Physical Laboratory New Delhi, India, Febuary13 -16, 2008
Indo-Australian Solar Energy Workshop, Amity Institute of Renewable and
Alternative Energy, Amity University, Noida, February 9-10, 2010
International Materials Research Congress Symposium (IMRC), Cancun- Mexico,
August 15-19, 2010.
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3. REFERRED PUBLICATIONS
SCI Journals
1. “Determination of front surface recombination velocity of silicon solar cells using
the short wavelength spectral response” by A.K. Sharma, S.K. Agarwal and S. N.
Singh. Solar Energy Materials & Solar Cells Volume 91, Issue 15 +16, 22
September 2007, Pages 1515-1520. (Cited 3 times in Scopus)
2. “The growth kinetics and optical confinement studies of porous-Si for application in
terrestrial Si solar cells as antireflection coating” by B.C.Chakravarty, Jyoti Tripathi,
A.K.Sharma, R.Kumar, S.B.Samanta and S.N.Singh. Solar Energy Materials &
Solar Cells, Volume 91, Issue 8, 4 May 2007, Pages 701-706. (Cited 7 times in
Scopus)
3. “Effect of specimen exposure to air on determination of diffusion length in p-silicon
wafer using the photocurrent generation method” A.K. Sharma, S. N. Singh,
Nandan S. Bisht, H.C. Kandpal and Z. H. Khan. Solar Energy, Volume 85, Issue
5, 31 March 2011, Pages 1137-1143.
4. “Determination of minority carrier diffusion length from distance dependence of
lateral photocurrent for side-on illumination” A.K. Sharma, S. N. Singh, Nandan S.
Bisht, H.C. Kandpal and Z. H. Khan. Solar Energy Materials & Solar Cells,
(Accepted doi:10.1016/j.solmat.2011.04.027).
International & National Conferences/Symposium
1. “Estimation of front surface recombination velocity of minority carriers for n +- p-p+
silicon solar cells from short wavelength spectral response” by A.K. Sharma, S.K.
Agarwal and S. N. Singh. International Workshop on the Physics of Semiconductor
Devices (IWPSD) NPL New Delhi, India, Dec.13 -17, 2005.
2. “Measurement of front surface recombination velocity of silicon solar cells using
the short wavelength spectral response” by A.K. Sharma, S.K. Agarwal and S. N.
Singh. International Materials Research Congress Symposium (IMRC) Cancun,
Mexico, August 20-24, 2006.
3. “Effect of surface passivation on the front surface recombination velocity of n +-p-
p+ silicon solar cells” by A.K. Sharma, S.K. Agarwal and S. N. Singh. Materials
Research Society of India Symposium (MRSI) NPL, Delhi, India, Feb 12 -14, 2007.
4. “Determination of minority carrier diffusion length from distance dependence of
lateral photocurrent for side-on illumination” A.K. Sharma, S. N. Singh, Nandan S.
Bisht, H.C. Kandpal and Z. H. Khan. International Materials Research Congress
Symposium (IMRC) Cancun, Mexico, August 15-19, 2006.
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4. ADDITIONAL SKILLS
Solar photovoltaics
Wafer quality analysis through diffusion length measurement
Conventional silicon solar cell fabrication and performance analysis
ARC and surface passivation quality analysis
Computer
Languages: QBasic, FORTRAN, C
Software‟s: Origin 8.0, Mathematica, PC1D, FILMSTAR
Management
Admirable organizational, interpersonal skills,
Excellent analytical and presentation skills
Member Organizing Committee, IWPSD-2005 NPL, New Delhi, India, Dec.13 -17, 2005
PRESENT RESEARCH INTREST
Development of characterization methods for crystalline Si solar cells
Light management in conventional crystalline Si solar cell
New photovoltaic materials for energy generation
REFRENCES
Dr. S. N. Singh (Emeritus Scientist)
Physics of Energy Harvesting Division, National Physical Laboratory, New Delhi-110012
Tel.: +91-11-4560-8379 (O), Fax: +91-11-4560-9310, Email- snsingh@nplindia.org
Dr. Z. H. Khan (Prof. and Honorary Director)
Department of Physics & FTK- Center for Information Technology
Jamia Millia Islamia (A Central University), Jamia Nagar, New Delhi- 110025
Tel.: +91-11-2698-7707(O), Fax: +91-11-2698-7707, Email- zhkhan@jmi.ac.in
Dr. A. K. Tripathi (Director and Scientist „F‟)
Ministry of New and Renewable Energy (Govt. of India),
Block No. 14, CGO Complex, Lodhi Road New Delhi-110003
Tel. and Fax: +91-11-2436-3035, 91-11-2436-0707, Email- aktripathi@nic.in
Date: April 23, 2011
Place: New Delhi
(Ashok Kumar Sharma)
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