Dr. Jai Prakash Tiwari
Principal Scientist
Physics of Energy Harvesting
Email address:
Brief Biodata:

Current position and Address : Scientist
Organic and Hybrid Solar Cells Group, National Physical Laboratory,
Dr. K. S. Krishnan Marg, New, Delhi - 110012
Tel: +91-11-45608640, Mobile: +91-9013301619, Fax: +91-11-45609310
E-mail: tiwarijp@mail.nplindia.org, jai_ti2002@yahoo.com


• December 1999 – January 2006(Submitted), May 2006 (Defended)

Ph.D. in Materials Science, Indian Institute of Technology, Kanpur, INDIA, Thesis Supervisor: Prof. K. Shahi
Course work Cumulative Performance Index (CPI): 8.00 out of 10
Thesis: “ Ion transport in mechanochemically synthesized amorphous fast ionic conductors ".

• July 1996 - July 1998

Mater of Technology (M.Tech) in Materials Science, Indian Institute of Technology, BHU, Varanasi INDIA
Course work Cumulative Performance Index (CPI): 7.97 out of 10

Supervisor: Prof. R. K. Mandal and Prof. R. K. Sinha.

Thesis: "Combined gel precipitation and processing of ZrO 2 -Al 2 O 3 microcomposite".

• September 1993 - July 1995:

Master of Science in Physics, Department of Physics,Banaras Hindu University (B.H.U.) Varanasi India, Division: 1st, 61.4 %

Project thesis: Study of Propagation and attenuation of electromagnetic wave through optical fiber using Foce-01 kit.

Supervisor. Prof. K. K. Dey


July 2012 - Present

Scientist Gr.IV(2)

NPL, New Delhi INDIA

January 2010 – July 2012

Scientist Gr.IV(2)


Jan 2008 – Jan2010

Scientist Gr.IV(1)

CECRI, Tamilnadu INDIA

July 2006 – Jan 2008:

Quick hire Fellow

CECRI, Taminadu India  

8Jan 2008 – 19 Jan 2008

Visited Technion

Dapartment of Physics, Israel Haifa

August 1998 – Dec 1998

Project Associate


March 1999 – June 1999

Project Associate




• Lithium Ion Batteries, Solid State Ionics, Solid Oxide Fuel Cells, Energy storages materials

• Functional Nano materials, Nano biotechnology

• Solar Cells

• Organic as well as perovskite Solar Cells


• Materials Synthesis

Template Method

Sol-gel synthesis

Melt-quenched synthesis

Thermal Vapour Deposition


Pulse Laser Deposition


• Materials Characterization: Structural Studies

X-ray diffraction,

Scanning electron microscopy,

Tunneling electron microscopy (TEM),

Atomic force microscopy (AFM),

Electron paramagnetic resonance (EPR),

Rutherford back scattering (RBS).


• Thermal Studies

Differential scanning calorimetry (DSC)

Differential thermal analyzer (DTA)

• Electrical Characterization

Impedance spectroscopy,

Four probe measurement

Electrochemical cell characterization

Organic Solar Cell Testing and fabrication under Glove box

• Structural characterization of thin films, multilayers and super lattices using X-ray diffraction technique



• 3years' experience as a teaching faculty forseveral B.Techs at CECRI KaraikudiTamilnadu during my service.

• Supervised experimental projects of several undergraduate students and summer trainees NPL as well as well as at CECRI



Gender: Male, Date of Birth: 10 th April, 1973, Marital status: Married, Citizenship: Indian, Blood Group: AB (+ve)



(1) J. P. Tiwari and K.Shahi, Ionic Switching in Mechanochemically Synthesized Ag 2 S-Sb 2 S 3 amorphous superionic conductor , IONICS, 10 (2004) 73-76.

(2) J. P.Tiwari and K.Shahi, Ion dynamics in mechanochemically synthesized amorphous fast Ionic conductorAg 2 S-Sb 2 S 3 , Solid State Ionics, 176 (2005) 1271-1280.

(3) J.P.Tiwari and K.Shahi, Ion Transport and electrolytic properties of mechanochemically synthesized Ag 2 S-Sb 2 S 3 amorphous fast ionic conductor , Materials Science and Eng., B 141 (2007) 8-15.

(4) J. P. Tiwari and K.Shahi, Super-linear frequency dependence of ac conductivity of disordered Ag 2 S-Sb 2 S 3 at cryogenic temperatures , Philosophical Magazine, 87(2007) 4475-4500.: 26 Pages article contradicting the concept of universal loss developed by Professor K. Funke, Himanshu Jain et al. in the area of Solid State Ionics.

(5) J. P. Tiwari and C.R. K. Rao, Template synthesized high conducting silver chloride

nanoplates , Solid State Ionics.179 (2008) 299-304. : Star author article

(6) R. K.Sahu, D. Mukherjee, J. P.Tiwari , T. Mishra, S. K. Roy and L.C Pathak,

Direct deposition of Pt film on glass substrate at room temperature assisted by hematite dissolution. J. Mater. Chem. 19 (2009) , 6810 – 6815.

(7) Noor Aman, T. Mishra, R. K. Sahu, J. P. Tiwari , Facile synthesis of thermally stable, mesoporous N doped binary oxide nanomaterial with enhanced photocatalytic activity under visible light: J. Mater. Chem. , 2010,  20 , 10876-10882.

(8) AshwinMurugappanChockalingam, Heman Kumar Ramiya Ramesh Babu, RaghuramanChittor, Jai Prakash Tiwari , Gum arabic modified Fe 3 O 4 nanoparticles cross linked with collagen for isolation of bacteria, Journal of Nanobiotechnology, Chockalingam et al. Journal of Nanobiotechnology 2010, 8:30: http://www.jnanobiotechnology.com/content/8/1/30 : Star author article

(9) J. P. Tiwari, SrirajPillai,SonalParakh, Farman Ali,Abhishek Sharma, and Suresh Chand

A futuristic approach towards interface layer modifications for improved efficiency in inverted organic solar cells, APPLIED PHYSICS LETTERS 104, 041114 (2014): Star author article

(10) Farman Ali, Abhishek Sharma, Jai Prakash Tiwari, and Suresh Chand

Extended interface layer concept for higher stability and improvement of life time in bulk heterojunction solar cells, AIP ADVANCES 5, 027108 (2015): Star author article


(1) Farman Ali, Abhishek Sharma, J.P.Tiwari and Suresh Chand, A Process for growing a cathode to improve the lifetime of polymer Solar cells, Indian Patent 2014