Dr. (Ms.) Ritu Srivastava
Sr. Principal Scientist
Advanced Materials and Device Metrology Division
Email address:
Brief Biodata:

Dr. Ritu Srivastava
Advanced Materials and Devices Metrology Division (4.02)/
Photonics Materials Metrology Section,
CSIR-National Physical Laboratory
New Delhi-110012.
Phone: (011) 45608644
Fax: (011) 45609310
Email: ritu@nplindia.org

  • Educational Qualifications:


S.No Degree Year Subject University/Institution





Purvanchal University of Jaunpur (U.P.)





Purvanchal University of Jaunpur (U.P.)





Banaras Hindu University, Varanasi(U.P)


  • Academics/Research Experience:


S.No. Positions
Name of the
From To


Faculty Member

ICFAI University Hyderabad




Scientist C

CSIR-National Physical Laboratory, New Delhi




Senior Scientist

CSIR-National Physical Laboratory, New Delhi




Principal Scientist

CSIR-National Physical Laboratory, New Delhi


Till now


  • Date of Joining NPL:  10-08-2004
  • No. of Publications:


SCI Journals Conference/ proceedings Books


Sixty Nine

Chapter 2


  • No. of Patents : Two

    • PROCESS FOR GROWING AN ELECTRON INJECTION LAYER TO IMPROVE THE EFFICIENCY OF ORGANIC LIGHT EMITTING DIODES Kamalasanan Narayanan Modeeparampil, Ritu Srivastava, Rakhi Grover, Sundeep Kumar Dhawan, Suresh Chand, S. S.Bawa, New Delhi US 8,491,820 B2 Jul. 23, 2013 (Awarded)
    • LITHIUM METAL QUINOLATES AND PROCESS FOR PREPARATION THEREOF AS GOOD EMITTING INTERFACE MATERIALS AS WELL AS N_TYPE DOPANT FOR ORGANIC ELECTRONIC DEVICES Kamalasanan Narayanan Modeeparampil, Ritu Srivastava, Amit Kumar, Ishwar Singh, Sundeep Kumar Dhawan, S. S.Bawa, New Delhi US 9,368,734 B2 June. 14, 2016 (Awarded)
    • Current Activity : I am working in the general area of organic semiconductor, nanotechnology and 2d materials, which includes the synthesis and characterization of materials, study of electrical, optical and optoelectronic properties and its application in fabrication of d>evices like organic light emitting diodes, organic photovoltaic cells , organic thin film transistors and Organic light emitting transistors.

  • Honours and Award:

    1. CSIR -Senior Research Fellowship 
    2. Ex-SRF(CSIR)
    3. BEST POSTER award for the paper “A proton conducting gel using precursor tetraethyl orthosilicate (TEOS) doped with H3PO4” in the Sixth Asian Conference On Solid State Ionics, Suraj Kund, New Delhi, India (Nov 29-Dec 4, 1998).
    4. Prof. Suresh Chandra Medal for the best paper “Application of porous silica gel electrolytes for whisker growth” in the Fourth National Conference on Solid State Ionics, Nagpur (Feb 15-17,2002).
    5. First Prize for the BEST PAPER presentation in the National Seminar on Advanced Materials, DDU Gorakhpur University, Gorakhpur (22nd-24th March, 2002)
  • Any other information:

    Resource Person in Research Training Workshop on Solid State Ionics, B.H.U., Varanasi Nov. 22-28, 1998. Resource Person in Sixth Asian Conference on Solid State Ionics, Suraj Kund, New Delhi. Nov. 29-Dec.04, 1998. Member of N.S.S. from 1989-1991.


  • Project Implemented

    CSIR-Network project “Development of Key Technologies for Photonics and opto-electronics”(2002-2007)
    DIT project “Development of Organic Light Emitting diodes”(2003-2007)
    DST project “Development of White OLEDs”(2007-2010)
    CSIR network project “Fabrication of LED Devices and Systems for Solid State Lighting Applications” (2007-2012)
    DRDO project “A study of adaptive Spherical Lens using Nematic Liquid Crystal for defense Applications”(2010-2012)
    CSIR network project “Efficient lighting system/devices Solid State Lighting (OLED/OLETs)under CSIR-TAPSUN”(2012-2017)

  • Conference/ Workshop organized

    Short term course on spectroscopic ellipsometry (22th Sept—25th Sept.) National Physical Laboratory, New Delhi (India).
    TAPSUN Conference 2012 “Advances in Futuristic Solar Energy Technologies” Dec. 4&5, 2012, CSIRNPL, New Delhi
    Co-coordinator of NPL Lab visit for science village student during IIFS-2016.
    Organizing member of ICTF 2017
    Organizing member of OPET 2017
    Coordinator of OPET 2018


    Invited Talk

  • Effect of doping on the optoelectronics properties of organic semiconductors National Conference on Recent Advances in Materials Science & Engineering: A Multidisciplinary Approach[RAMSE 2010]October 23-24, 2010 Jaypee University of Engg. & Technology Raghogarh, Guna (M.P.)
  • Organic LEDs for Lighting Applications Seminar on Organic Semiconductor, March 16, 2011, DITM Gannore Harayana
  • Organic Semiconductors and Devices A workshop on Electronic and Ionic Materials and Devices, March 25- 27,2011 Banaras Hindu University Varanasi (U.P.)
  • Fabrication of Hybrid Organic-Inorganic Led Device using Quantum Dots as an active Emissive Layer National Symposium on Recent Advances in Nanoscience, Engineering & Technology at ABV- Indian Institute of Information Technology & Management, Gwalior, India Nov 19-20, 2011.
  • Application of new LED technologies leading to power saving National seminar on“Applications of Engineering and Technology In Energy Management”, on 25th and 26th Feb 2014 at IIMT, Greater Noida
  • Organic Semiconductor and its applications “Recent developments in Physics (NCRDP-2014)” on 29th and 30th March 2014 at Department of Physics SD (PG) College, Panipat
  • “Role of Inorganic nanostructures in organic Photovoltaics: A future prospective” INDO-FINNISH WORSHOP APPLICATIONS OF NANOSTRUCTURES IN PHOTOVOLTAICS, 20-21st October, 2014, Physics Department IIT Delhi.
  • Plastic Solar Cell:New GenerationOrganic-Inorganic Hybrid Devices, National workshop on Flexible electronics 18th January 2016 UIET Kurushetra
  • Organic Thin Film Optoelectronics Devices " A 3-Day Workshop on Thin Film Technologies’ from 06th-08th June, 2018" going to be held at Indian Institute of Information Technology, Allahabad,


Ph.D. Awarded

  • Dr. Amit Kumar
  • Dr. Omwati
  • Dr. Manisha Bajpai
  • Dr. Priyanka Tyagi
  • Dr. Razi Ahmad
  • Dr. Harneet Kaur
  • Dr. Kalpana Agarwal


Ph.D. Students

  • Dr. Razi Ahamad (CSIR-RA)
  • Ms. Ritu Verma (RGNF-SRF)
  • Mr. Asish (CSIR-JRF)
  • Mr. Surya Tiwari(CSIR-SRF)
  • Mr. Ramashankar (CSIR-SRF)


Publication: (Five years)


43. Size‐Tunable Synthesis of Colloidal Silver Sulfide Nanocrystals for Solution‐Processed Photovoltaic Applications Dr. Razi Ahmad , Dr. Ritu Srivastava , Hema Bhardwaj , Dr. Sushma Yadav , Dr. Vidya Nand Singh Dr. Suresh Chand , Dr. Nidhi Singh ,  Prof. Sameer Sapra, https://doi.org/10.1002/slct.201702786

42. Metal-CH3NH3PbI3-Metal Tunnel FET Kalpana Agrawal, Vinay Gupta, Ritu Srivastava, and S. S. Rajput IEEE TRANSACTIONS ON ELECTRON DEVICES

41. Modeling of Study of enhancement in the dielectric and electrical properties of WO3-ped LiF nano-composite Ritu Verma, Surya Prakash Tiwari, Reena Kumari, and Ritu Srivastava Journal of Materials Science, Vol. 53, Issue 6, pp 4199–4208, 2018 https://doi.org/10.1007/s10853-017-1870-3

40. Influence of Active Layer Thickness on Electrical Properties of P3HT/n-Si based Hybrid Heterostructure, Abhiram Gundimeda, Monu Mishra, Razi Ahmad, Ritu Srivastava, Umesh K. Dwivedi, Govind Gupta, Indian Journal of Pure & Applied Physics, 56, 468 (2018)

39. Enhanced luminescence efficiency of wet chemical route synthesized InP-based quantum dots by a novel method: Probing the humidity sensing properties AkankshaSingh, ChavviSharma, MaheshKumar, ReenaKumari, RituSrivastava, Shailesh NarainSharma Journal of Luminescence Volume 198, June 2018, Pages 108-116.


38. Li-doped ZnO nanostructures for the organic light emitting diode application Payal Manzhi , Md. B. Alam , Reena Kumari , Richa Krishna , Rajiv Kumar Singh , Ritu Srivastava , O.P. Sinha Vacuum, Vol. 146,  Pages 462-467, 2017, https://doi.org/10.1016/j.vacuum.2017.07.018

37.Charge Transport Study of P3HT blended MoS2, Surya Prakash Tiwari, Ritu Verma, Md Bayazeed Alam, Reena Kumari, O.P. Sinha, Ritu Srivastava Vacuum vol. 146, pp. 474-477,2017 doi: 10.1016/j.vacuum.2017.07.004

36.Organic Permeable Base Transistor Based on Inverse of Transistor Efficiency (IC/gm) Kalpana Agrawal, Ritu Srivastava, and S. S. Rajput  Article in IEEE Transactions on Electron Devices PP(99):1-7, 2017 DOI: 10.1109/TED.2017.2715058

High Yield Synthesis and Chemical Exfoliation of Two-Dimensional Layered Hafnium Disulphide Harneet Kaur, Sandeep Yadav, Avanish K. Srivastava, Nidhi Singh, Shyama Rath, Jorg J Schneider, Om P. Sinha and Ritu Srivastava, Nano research, 2017, DOI 10.1007/s12274-017-1636-x

34.Functionalized Molybdenum Disulphide Nanosheets for 0D-2D Hybrid Nanostructure: Photoinduced Charge Transfer and Enhanced Photoresponse J. Phys. Chem. Lett., 2017( DOI: 10.1021/acs.jpclett.7b00243).

Year 2016

33. A vertically stacked phosphorescent multilayer organic light emitting transistor Ritu Verma, Vandana Yadav, Khushdeep Kaur, Md Bayazeed Alam, Nidhi Singh,C. K. Sumana and Ritu Srivastava RSC Advances,6, 90873-90877, 2016

32. Low Voltage Organic Permeable Base N-type Transistor Kalpana Agrawal, Omwati Rana , Nidhi Singh, Ritu Srivastava and S.S. Rajput APL, 109, 163301,2016(DOI: 10.1063/1.4964838)

31. Large Area Fabrication of Semiconducting Phosphorene by Langmuir-Blodgett Assembly Harneet Kaur, Sandeep Yadav, Avanish. K. Srivastava, Nidhi Singh, Jörg J. Schneider, Om. P. Sinha, Ved V. Agrawal, & Ritu Srivastava Scientific Report, 1-8,2016(DOI: 10.1038/srep34095)

30. Interactions of titania based nanoparticles with silica and green-tea: photo -degradation and - luminescence

Rajni Verma · Aditi Awasthi · Punita Singh · Ritu Srivastava · Huaping Sheng · Jianguo Wen · Dean J. Miller · Avanish K. Srivastava

No preview · Article · Apr 2016 · Journal of Colloid and Interface Scienc

29. Preparation and photoluminescence enhancement in terbium(III) ternary complexes with β-diketone and monodentate auxiliary ligands

Devender Singh · Kapoor Singh · Shri Bhagwan · Raman Kumar Saini · Ritu Srivastava · Ishwar Singh

Article: January 2016 with 10 Reads

DOI: 10.1080/23312009.2015.1134993

28. Characterization and luminescent properties of zinc–Schiff base complexes for organic white light emitting devices

Vandna Nishal · Devender Singh · Raman Kumar Saini · Vijeta Tanwar · Sonika Kadyan · Ritu Srivastava · Pratap Singh Kadyan · Alexandra Martha Zoya Slawin December 2015 with 61 Reads

DOI: 10.1080/23312009.2015.1079291

27. Incorporation of liquid crystalline triphenylene derivative in bulk heterojunction solar cell with molybdenum oxide as buffer layer for improved efficiency Manisha Bajpai, Neelam Yadav, Sandeep Kumar, Ritu Srivastava & Ravindra Dhar.

Liquid Crystals: March 2016 DOI: 10.1080/02678292.2016.1149239 (Impact Factor: 2.49)

26. Degradation of organic light emitting diode: Heat related issues and solutions

Priyanka Tyagi, , Ritu SrivastavaLalat Indu GiriSuneet TuliChanghee Lee

Synthetic Metals, 2015, doi:10.1016/j.synthmet.2015.10.016(Impact Factor 2.252)

25. Tunable field effect properties in solid state and flexible graphene electronics on composite high – low k dielectric

Arunandan Kumar, Priyanka Tyagi, Janardan DagarRitu SrivastavaCarbon, Vol.99, April 2016, Pages 579–584 (Impact Factor 6.196) http://dx.doi.org/10.1016/j.carbon.2015.12.073

24. Charge carrier generation in polymer by using n-type doping for the improvement of electrical properties. Manisha Bajpai, Ritu Srivastava, R. Dhar, Suresh Chand Adv. Mater. Lett. 2016, 7(5), 414-418 DOI: 10.5185/amlett.2016.6028

Year 2015

23. Study of binary and ternary organic hybrid CdSe quantum dot photodetector M.Ramar,S.Kajal,P.Pal,R.Srivastava, C.K.Suman Applied Physics A, (I.F1.694) Bulk hetrojunction solar cell based on self assembling of disc shaped liquid crystalline material. Manisha BajpaiNeelam YadavSandeep KumarRitu Srivastava, Ravindra Dhar. Liquid crystals 2015 DOI:10.1080/02678292.2015.1108466) (Impact Factor 2.49)

21. Improved Performance of Organic LEDs with Modified Metal-Organic Interface Ritu Srivastava , Omwati Rana, Razi Ahmad, C.K.Suman, M.Zulfequar , M.Husain and  M.N.Kamalasanan
IOP Conf. Series: Materials Science and Engineering 73 (2015) 012046 doi:10.1088/1757-899X/73/1/012046 (Impact Factor 2.881)

20. Packing directed beneficial role of 3-D rigid alicyclic arms on the templated molecular aggregation problem

Sunil KumarPunita SinghRitu Srivastava and Subrata Ghosh RSC Adv., 2015,5, 61249-61257 DOI: 10.1039/C5RA08231E(Impact Factor 3.708)

19. High yield synthesis of electrolyte heating assisted electrochemically exfoliated graphene for electromagnetic interference shielding applications"

Prashant Tripathi,   Ch. Ravi Prakash Patel,   Abhishek DixitAvanish Pratap Singh,   Pawan Kumar,  M. A. ShazRitu Srivastava,  Govind Gupta,  S. K. Dhawan,  Bipin Kumar Gupta and   O. N. Srivastava 

RSC Adv.,  2015,5, 19074-19081 [DOI: 10.1039/C4RA17230B] (Impact Factor 3.708)

18. Study of fluorescence quenching due to 2,3,5,6-tetrafluoro-7,7',8,8'- tetracyano quinodimethane and its solid state diffusion analysis using photoluminescence spectroscopy. Priyanka Tyagi, Suneet Tuli, and Ritu Srivastava  
Journal of Chemical Physics, 142, 054707 (2015) (Impact Factor 3.142)

17. New Solution-Processed n-type Polydioxane Polymer for Highly-Efficient Green emission OLEDs Devices  Bipin Kumar Gupta, Garima Kedawat, Pawan Kumar, Mohammad A. Rafiee, Priyanka Tyagi, and Ritu Srivastava
J. Mater. Chem. C, 2015(accepted) (Impact Factor 3.708) DOI: 10.1039/C4TC02581D

16. Synthesis and Electroluminescence properties of Tris [5-choloro- 8- hydroxyquinoline] Aluminium Al(5-Clq)3 Journal of Semiconductors 2015

15. Application of 2D-MoO3 nano-flakes in Organic Light Emitting Diodes: Effect of Semiconductor to Metal Transition with Irradiation.
Janardan Dagar,   Priyanka Tyagi,   Razi Ahmad,   Rashmi Singh,  O. P. Sinha,   C. K. Suman and   Ritu Srivastava  
RSC Adv., 2015, 5, 8397 DOI: 10.1039/C4RA12430H(Impact Factor 3.708)

14.Conductive cooling in white organic light emitting diode for enhanced efficiency and life time Priyanka Tyagi, Arunandan Kumar, Lalat Indu Giri, Suneet Tuli and Ritu Srivastava Applied Physics Letters 106, 013301 (2015); doi: 10.1063/1.4903800 (Impact Factor 3.844)

Year 2014

13. A new zinc–Schiff base complex as an electroluminescent material Vandna Nishal, Devender Singh, Amit Kumar, Vijeta Tanwar, Ishwar Singh, Ritu Srivastava & Pratap Singh Kadyan Journal of Organic Semiconductors, Vol. 2, No. 1, 15–20, 2014 http://dx.doi.org/10.1080/21606099.2014.942767

12. Enhanced carrier transport in tris(8-hydroxyquinolinate) aluminum by titanyl phthalocyanine doping M. Ramar, Priyanka Tyagi, C. K. Suman and Ritu Srivastava RSC Adv., 2014,4, 51256-51261 [DOI: 10.1039/C4RA09116G] (Impact Factor 3.708)

11. p-Type doping of tetrafluorotetracynoquinodimethane (F 4TCNQ) in poly (para-phenylene vinylene)(PPV) derivative “Super Yellow”(SY) M Bajpai, R SrivastavaR Dhar, RS Tiwari, S Chand
RSC Adv., 2014, 4, 47899-47905 DOI: 10.1039/C4RA08880H (Impact Factor 3.708)

10.  Interface modified thermally stable hole transporting layer for efficient organic light emitting diodes Rakhi Grover, Ritu Srivastava, Janardan Dagar, M. N. Kamalasanan,and D. S. Mehta Journal of Applied Physics 116, 063102 (2014)[ DOI: 10.1063/1.4892396]

9. Study of Schottky contact in binary and ternary hybrid CdSe quantum dot solar cells M. RamarC. K. Suman,   R. Manimozhi,  R. Ahamad and  R. Srivastava  RSC Adv., 2014, 4, 32651-32657 [DOI: 10.1039/C4RA04966G] (Impact Factor 3.708)

8. Engineering fused coumarin dyes: a molecular level understanding of aggregation quenching and tuning electroluminescence via alkyl chain substitution Sunil Kumar, Punita Singh, Ritu Srivastava, Rik Rani Koner, Avijit Pramanik, Jomon Mathew, Sougata Sinha, Madhu Rawat, R. S. Anand and Subrata Ghosh J. Mater. Chem. C, 2014, 2, 6637-6647 [DOI: 10.1039/C4TC00807C]

7. Investigation of the Photophysical and Electrical Characteristics of CuInS2 QDs/SWCNT Hybrid Nanostructure Razi Ahmad, Udit Soni, Ritu Srivastava, Vidya Nand Singh, Suresh Chand, and Sameer Sapra. J. Phys. Chem. C 2014, 118,, 11409–11416 [dx.doi.org/10.1021/jp411568c]

6. Design and synthesis of novel Anthracene derivatives as n-type emitters for   electroluminescent devices: a combined experimental and DFT study G. Mallesham, S. Balaiah, M. Ananth Reddy,B. Sridhar, Punita Singh, Ritu Srivastava, K. Bhanuprakash and V. Jayathirtha Rao Photochem. Photobiol. Sci., 2014, 13, 342 [DOI: 10.1039/c3pp50284h]

5. Chemical structure dependent electron transport in 9,10-bis(2-phenyl-1,3,4-oxadiazole) derivatives of Anthracene Arunandan Kumar, Priyanka Tyagi, M. Ananth Reddy,G. Mallesham, K. Bhanuprakash, V. Jayathirtha Rao, M. N. Kamalasanana and Ritu Srivastava RSC Adv. 4, 12206, 2014[DOI: 10.1039/c3ra47215a] (Impact Factor 3.708)

4. n-Type ternary zinc complexes: Synthesis, physicochemical properties and organic light emitting diodes application Amit Kumar, Akshaya K. PalaiRitu Srivastava, Pratap S. KadyanModeeparampil N. KamalasananIshwar Singh Journal of Organometallic ChemistryVolume 756, 15 April 2014, Pages 38–46[doi.org/10.1016/j.jorganchem.2014.01.022]

3. Elucidation on Joule heating and its consequences on the performance of organic light emitting diodes" Priyanka Tyagi, Lalat Indu Giri, Suneet Tuli and Ritu Srivastava Journal of Applied Physics 115, 034518 (2014) [doi.org/10.1063/1.4861412]

2. Novel organic electron injection layer for efficient and stable organic light emitting diodes Rakhi Grover , Ritu Srivastava , M.N.Kamalasanan , D.S.Mehta Journal of Luminescence 146(2014) 53–56

1."Multilayer thin film encapsulation for organic light emitting diodes" Rakhi Grover, Ritu Srivastava,  M. N. Kamalasanan and D. S. Mehta RSC Adv., 4, 10808-10814, 2014(Impact Factor 3.708)