DP/DU No. and  Name: (#4.01), Photovoltaic Metrology Section/ Advanced Materials and Device Metrology

Current position and Address: 

Scientist, Room No. 54,Main Building,
 CSIR-National Physical Laboratory,
 Dr. K.S. Krishnan Road,
 New Delhi-110012

Educational Qualifications: 

Academics/Research Experience:    

Date of Joining NPL: 4^th January 2007

No. of Publications:

 No. of Patents  :02 (Granted, US and EU); 01 (filed, India)

Current Activity                                                        

• Photovoltaic Metrology: Primary reference solar cell, PV modules 
• Efficient silicon solar cells: Homo-junction; organic semiconductor/Si hybrid and inorganic semiconductor/Si hetero-junctions based. 
• Thin/Felxible silicon solar cells
• Silicon nanostructures based novel solar cell concepts for next generation photovoltaic applications
• Novel light trapping schemes: silicon nanostructures such as arrays of nanowires, nanotips, nano scale-textured silicon, nano and micro pyramids, inverted pyramids, their light trapping properties for  cost effective PV devices

Honors and Award: 

Awards:

•    CSIR Young Scientist Award-2013 in the area of Physical Sciences.
•    Young Investigator Award for “Wet chemically etched silicon nanowires based p-n junction solar cell” in the International conference “Next generation solar energy’: from fundamentals to applications” held in Erlangen, Germany, 12-14 Dec 2011. (http://bayern-innovativ.de/nextgeneration-pv2011/gallery)

Fellowships:

•  BOYSCAST fellowship 2010-11 (Aug 2011-Aug 2012) Department of Science and Technology (DST), Government of India.

Any other information:

Selected Publications:
•    Highly efficient PEDOT:PSS/Silicon hybrid solar cells via effective surface micro-engineering of low-cost solar-grade silicon wafers, ACS Applied Energy Materials, 4 (2021) 4181–4198.
•    Enhanced photovoltaic performance of PEDOT:PSS/Si solar cells using hierarchical light trapping scheme, Solar Energy, 170 (2018) 221-233.  (Citations: >20)
•    Antireflective ultra-fast nanoscale texturing for efficient multi-crystalline silicon solar cells, Solar Energy 115 (2015) 656-667.  (Citations: >35)
•    Large area fabrication of vertical silicon nanowire arrays by silver assisted single-step chemical etching and formation kinetics, Nanotechnology, 25, (2014) 175601 (17 pages). (Citations: >100)
•    Probing photo-carrier collection efficiencies of individual silicon nanowires diodes on a wafer substrate, Nanoscale, 6, (2014) 7897-7902. Listed in HOT articles of Nanoscale 2014.
•    Silver catalyzed nano-texturing of silicon surfaces for solar cell applications, Sol. Energy Mater. & Sol. Cells, 100, (2012) 33-38. (Citations: >125)
•    Nanowire arrays in multi-crystalline silicon thin films on glass: a promising material for research and applications in nano-technology, Nano Lett.  12 (8), (2012) 4050-4054. (Citations: >80)
•    Fabrication of silicon nanowire arrays based solar cell with improved performance, Sol. Energy Mater Sol. Cells, 95, (2011), 215-218. (Citations: >200)-Listed in TOP 25 Cited articles of SOLMAT (1st Jan 2016 to Dec 2016).
•    Excellent Antireflection Properties of Vertical Silicon Nanowires Arrays, Sol. Energy Mater Sol. Cells, 94, (2010) 1506-1511.  (Citations: >275). Listed in TOP 25 Cited articles of SOLMAT (1st Jan 2015 to 31st Dec 2015).

Scientific reviewer of Journals:

Advanced Materials, Nature-Scientific Reports, Nanoscale, ACS Appl. Energy Mater, ACS-Appl. Mater & Interfaces, ACS Appl. Nano Mater, Progress in Photovoltaics: Res & applications, IEEE-J. Photovoltaics; Solar Energy Materials and Solar Cells, Solar Energy, Applied Surface Science, Journal of Physical Chemistry, Applied Physics Letters, Journal of Applied Physics, Journal of electrochemical Society, Carbon, Nanoscale Research Letters, Carbon, RSC Adavnces, Journal of Alloys and Compound, J. Mater Sci.; etc..

Membership: Life Member :Electron Microscopy Society of India (EMSI)

                         Life Member  :Carbon Society of India

                         Life Member :Metrology Society of India