Monojit Bag
Associate professor
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Organic Electronics, Organic Solar cells, Organic LEDs, FETs, sensors & detectors, Electrical & optical characterization., Organic-inorganic hybrid materials, Perovskite solar cells, stability study, impedance spectroscopy, optical microscopy., Intensity Modulated Photocurrent Spectroscopy, multi-layered device structure, polymer/electrolyte based device.
Educational Details
Professional Background
Administrative Positions


Honours and Awards

Teaching Engagements
Teaching Engagements

Associate Scholars

Educational Details
Jadavpur University
B. E., Electrical
Pune University
M.Sc., Physics
Jawaharlal Nehru Centre for Advanced Scientific Research
Ph.D., Material Science
Professional Background
Associate Professor
11 Dec 2021 - Present
Indian Institute of Technology Roorkee
Postdoctoral Fellow
01 Jul 2015 - 31 Dec 2015
Lund University
Assistant Professor
11 Jan 2016 - 10 Dec 2021
IIT Roorkee
Postdoctoral Fellow
01 Feb 2012 - 31 May 2015
University of Massachusetts Amherst
Research Associate
01 Aug 2011 - 31 Jan 2012
Jawaharlal Nehru Centre for Advanced Scientific Research
Administrative Positions
DRC Member
01 Jun 2016 - 31 May 2018
IIT Roorkee, Dept. of Physics
DFSC member (Secretory)
01 Jun 2019 - 30 Apr 2020
IIT Roorkee
Associate Faculty
01 Aug 2016 - Present
Centre of Nanotechnology, IIT Roorkee
CRC Secretory
01 Oct 2020 - Present
Center of of Nanotechnology, IIT Roorkee
BTech (Engineering Physics) Coordinator
01 Jun 2016 - 30 Jun 2020
IIT Roorkee
CAC member
01 Jan 2018 - Present
Center of Nanotechnology, IIT Roorkee
Investigation of semiconductor/electrolyte interfaces by EIS and photo-transient measurement 31 Mar 2017 Investigation of semiconductor/electrolyte interfaces by EIS and photo-transient measurement 22 lakhs SERB-DST NA
Hybrid-Halide Perovskites for Efficient Supercapacitor Application 07 Mar 2022 Energy storage 31 Lakh SERB, DST
Understanding Interfaces of organic electronic devices by Impedance Spectroscopy and IMPS 01 Jul 2016 Understanding Interfaces of organic electronic devices by Impedance Spectroscopy and IMPS 10 Lakhs (INR) IITR NA
Fabrication of large area (1 cm X 1 cm) uniform, pin hole free and highly efficient (upto 18%) stabl 01 Jul 2017 Fabrication of large area (1 cm X 1 cm) uniform, pin hole free and highly efficient (upto 18%) stabl 45 lakhs DST-SERI Prof. Soumitra Satapathi (PI)
Design and Characterisation of Novel Perovskite Semiconductors for Understanding and Elimination of 14 Dec 2020 Design and Characterisation of Novel Perovskite Semiconductors for Understanding and Elimination of 36 lakh DST-VR NA

Honors And Awards
Lund University, Sweden
Wenner Gren Postdoctoral Fellowship (selected)
CSIR-UGC fellowship
Pune University
M.Sc. Topper
Pune University
Late Satish Bhide prize for best project in M.Sc.
Teaching Engagements
Teaching Engagements
Electricity & Magnetism ( PHN-202 )
Electrodynamics and Optics ( PHN-005 )
Mechanics ( PHN-001 )
Technology of Nanostructured Fabrication ( NTN-602 )
Applied Physics ( PHN-004 )
Physics of Nanomaterials ( NTN-604 )
Solar Photovoltaic ( PHN-708 )
Optoelectronics ( PHN-712 )
Solid State Lighting ( PHN-733 )
Digital Electronics & Circuits ( PHN-209 )
Numerical Analysis and Computational Techniques ( PHN-701 )
Applied Instrumentation ( PHN-310 )
Polymer/electrolyte interface
18 Jul 2016 - Present
Other Supervisors: , Scholar: Priya Srivastava
Opto-electronic properties of Perovskite materials
07 Jul 2017 - Present
Other Supervisors: , Scholar: Ramesh Kumar
Perovskite based LEDs
07 Jul 2017 - Present
Other Supervisors: , Scholar: Jitendra Kumar
Photophysical study of perovskite solar cells
26 Dec 2018 - Present
Other Supervisors: , Scholar: Hemant Ronchia
Charge transport characterization of Perovskite Solar Cells
26 Dec 2018 - Present
Other Supervisors: , Scholar: Ankur Yadav
Large area perovskite solar cells
26 Dec 2018 - Present
Other Supervisors: Prof. K. L. Yadav, Scholar: Deepak (PhD)
Photoelectrochemical water splitting
26 Dec 2019 - Present
Other Supervisors: , Scholar: Arun Kumar
Photoelectrochemical water splitting
26 Dec 2019 - Present
Other Supervisors: , Scholar: Tanuj Kumar
Perovskite based field effect transistor
24 Aug 2020 - Present
Other Supervisors: , Scholar: Farha Naaz Mansoorie
QIP on Relevance of Nanotechnology to the rechargeable battery technology
01 Jan 2016 - Present
QIP- on Application of Nanotechnologies in Energy Sectors
01 Jan 2019 - Present
Electrochemical Impedance Spectroscopy to Study Charge and Ion Transport Kinetics in Hybrid Perovskites-based Optoelectronic Devices
19 Nov 2020 - 20 Nov 2020
Photo-electrochemical Impedance Spectroscopy in Hybrid Perovskites: Unveiling the Curious Case of Ion Migration
09 Mar 2021 - Present
13th National Conference on Solid State Ionics
01 Jan 2019 - Present
An introduction to Solar photovoltaic technology: From Si to Perovskites
01 Jan 2016 - Present
Ion migration in Perovskites: experimental evidence and theory to study ion kinetics
19 Sep 2020 - 19 Sep 2020
Recent trend in photovoltaics: Advantages and challenges of new generation solar technology
16 Oct 2020 - 16 Oct 2020
Recent trend in photovoltaics: Advantages and challenges of new generation solar technology
23 Feb 2021 - Present
Third Generation Solar Cells: Promises and Challenges
01 Jan 2018 - Present
Polymer Nanoparticle Solar Cells: Experiment and theory to understand nanoparticle assemblies
15 Sep 2020 - 15 Sep 2020
Polymer solar cell: Controlled morphology at nano-scale for large- scale printing
01 Jan 2019 - Present
Perovskite solar cells, stability analysis and future perspective
01 Jan 2019 - Present
Nanomaterials for Thermoelectric and Thermophotovoltaic Applications
01 Jan 2019 - Present
Refereed Journal Papers

Total Citation: 1944

h-index 21. 


43. Visualization of 3D to quasi 2D conversion of perovskite thin films via in-situ photoluminescence measurement: a facile route to design graded energy landscape, J. Kumar, A. Yadav, M. Bag*, Phys. Chem. Chem. Phys. 2022. xx, xxx.

42. Advanced Strategies to Tailor the Nucleation and Crystal Growth in Hybrid Halide Perovskite Thin Films, J. Kumar, P. Srivastava, M. Bag*, Front. Chem., 2022, 10, 842924.

41. Solar light induced photocatalytic process for reduction of hexavalent chromium and degradation of tetracycline and methylene blue by heterostructures made of SnS2 nanoplates surface modified by ZnWO4 nanorods, G. Kumar, J. Kumar, M. Bag, R. K. Dutta, Separation and Purification Technology, 2022, 292, 121040.

40. Hybrid Halide Perovskite Based Electrochemical Supercapacitors: Recent Progress and PerspectiveR. Kumar, Monojit Bag*, Energy Technology2022, 10(3), 2100889 (1-9).


39. Synthesis of Porous Electrode from CH3NH3PbBr3 Single Crystal for Efficient Supercapacitor Application: Role of Morphology on the Charge Storage and Stability, Ramesh Kumar, Prem Sagar Shukla, Ghanshyam Das Varma, Monojit Bag*, Electrochimica Acta, 2021, 398, 139344.

38. Tunable Ionic Conductivity and Photoluminescence in Quasi-2D CH3NH3PbBr3 Thin Film Incorporating Sulphur Doped Graphene Quantum Dots, Ramesh Kumar, Jitendra Kumar, Sachin Kadian, Priya Srivastava, Gaurav Manik*, Monojit Bag*, Phys. Chem. Chem. Phys., 2021, 23, 22733-22742.

37. Quantifying Capacitive and Diffusion-Controlled Charge Storage from 3D Bulk to 2D Layered Halide Perovskite-Based Porous Electrodes for Efficient Supercapacitor Applications, Ramesh Kumar, Monojit Bag*, J. Phys. Chem. C, 2021, 125(31), pp-16946–16954.

36.  Cation disorder and octahedral distortion control of internal electric field, band bending and carrier lifetime in Aurivillius perovskite solid-solutions for enhanced photocatalytic activity, J. Malik, S. Kumar, P. Srivastava, M. Bag, T. Mandal, Mater. Advances, 2021, 2, pp-4832-4842.

35. Fusible Low Work-function Top Electrode for Vacuum-free Perovskite Light Emitting Diode Application: Role of OH Terminated Sn Atoms at the Alloy Surface, Ramesh Kumar, Jitendra Kumar, Monojit Bag*, ACS Appl. Electron. Mater. 2021, 3(6), pp-2757-2765.

34.  The Curious Case of Ion Migration in Solid-state and Liquid Electrolyte-based Perovskite Devices: Unveiling the Role of Charge Accumulation and Extraction at the InterfacesPriya Srivastava, Ramesh Kumar, Monojit Bag*, Phys. Chem. Chem. Phys. 2021, 23, pp-10936-10945.

33.  Discerning the Role of A-Site Cation and X-Site Anion for Ion Conductivity Tuning in Hybrid Perovskites by Photoelectrochemical Impedance Spectroscopy, Priya Srivastava, Ramesh Kumar, Monojit Bag*, J. Phys. Chem. C, 2021, 125(1), pp-211-222.


32.  Role of A-Site Cation and X-Site Halide Interactions in Mixed-Cation Mixed-Halide Perovskites for Determining Anomalously High Ideality Factor and the Super-linear Power Law in AC Ionic Conductivity at Operating Temperature, Ramesh Kumar, Priya Srivastava, Monojit Bag*, ACS Appl. Electron. Mater., 2020, 2(12), pp 4087-4098.

31.  Unraveling Antisolvent Dripping Delay Effect on the Stronski-Karstanov Growth of CH3NH3PbBr3 Thin Film: A Facile Route for Preparing Textured Morphology with Improved Optoelectronic Properties, J. Kumar, R. Kumar, K. Frohna, D. Moghe, S. D. Stranks, Monojit Bag*, Phys. Chem. Chem. Phys., 2020, 22, pp 26592-26604.  

30. Unveiling the Morphology Effect on the Negative Capacitance and Large Ideality Factor in Perovskite Light Emitting Diodes, R. Kumar, J. Kumar, P. Srivastava, D. Moghe, D. Kabra*, Monojit Bag*, ACS Appl. Mater. Interfaces, 2020, 12(30), pp 34265-34273.

29.  Elucidating Tuneable Ambipolar Charge Transport and Field Induced Bleaching at CH3NH3PbI3/Electrolyte Interface, Priya Srivastava, Monojit Bag*, Phys. Chem. Chem. Phys., 2020, 22, pp 11062-11074.

28. Origin of Low Open Circuit Voltage in Surfactant-stabilized Organic Nanoparticle-based Solar Cells, T. S. Gehan, Christie L. C. Ellis, D. Venkataraman*, Monojit Bag*, ACS Appl. Mater. Interfaces, 2020, 12(7), pp 8183-8188.


27.  Temperature Assisted Nucleation and Growth to Optimize Perovskite Morphology at Liquid Interface: A Study by Electrochemical Impedance Spectroscopy, Priya Srivastava, Anukul Prasad Parhi, Rahul Ranjan, Soumitra Satapathi*, Monojit Bag*, ACS Appl. Energy Mater., 2018, 1(9), pp 4420-4425.

26. Interplay Between Ion Transport, Applied Bias and Degradation Under Illumination in Hybrid Perovskite  p-i-n Devices, Emily C. Smith, Christie L. C. Ellis, H. Javaid, Lawrence A. Renna, Yao Liu, Thomas P. Russell, Monojit Bag*, D. Venkataraman*,⁠ J. Phys. Chem. C, 2018, 122(25), pp 13986-13994.

25.  Evidence of tunable macroscopic polarization in perovskite films using photo-Kelvin Probe Force Microscopy, Lawrence A. Renna, Yao Liu, Thomas P. Russell, Monojit Bag, D. Venkataraman,⁠ Materials Letters, 2018, 217, pp 308-311.


24. Controlling morphology of CH3NH3PbI3 perovskite film by dual solvent elimination method, Anubhav Raghav, Shivam Singh, Shailendra Kumar Sharma, Dinesh Kabra, Monojit Bag, Soumitra Satapathi, Nano-Structures & Nano-Objects, 2017, 4, pp 106-112.

23. Mixed Ionic-Electronic Conduction in Binary Polymer Nanoparticle Assemblies, Lawrence A. Renna, Julia D. Lenef, Monojit Bag, D. Venkataraman, Adv. Mater. Interface, 2017, 4(20), pp 1700397.

22.  Role of Ionic Functional Groups on Ion Transport at Perovskite Interfaces, Yao Liu, Lawrence A. Renna, Hilary B. Thompson, Zachariah A. Page, Todd Emrick, Michael D. Barnes, Monojit Bag, D. Venkataraman, and Thomas P. Russell, Adv. Energ. Mater., 2017, 7(21), pp 1701235.


2012-2016 (Post-doctoral work)

21.  Indoor Light Recycling: A New Home for Organic Photovoltaics, Christie L. Cutting, Monojit Bag and D. Venkataraman, J. Mater. Chem. C, 2016, 4(43), pp 10367-10370.

20.  Evidence for Reduced Charge Recombination in Carbon Nanotube/Perovskite-based Active Layers, Monojit Bag, Lawrence A. Renna, Seung Pyo Jeong, Xu Han, Christie L. Cutting, Dimitrios Maroudas, and D. Venkataraman, Chem. Phys. Lett., 2016, 662, pp 35-41.

19.  Super-resolution luminescence micro-spectroscopy reveals mechanism of photo-induced degradation in CH3NH3PbI3 perovskite nano-crystals, Aboma Merdasa, Monojit Bag, Yuxi Tian, and Ivan Scheblykin, J. Phys. Chem. C, 2016, 120(19), pp 10711-10719.

18.  High Efficiency Tandem Thin-Perovskite/Polymer Solar Cell with Graded recombination Layer, Yao Liu, Lawrence A. Renna, Monojit Bag, Zachariah A. Page, Paul Kim, Jaewon Choi, Todd Emrick, D. Venkataraman, & Thomas P. Russell, ACS Appl. Mater. Interfaces, 2016, 8(11), pp 7070-7076.

17.  Tunable Percolation in Semiconducting Binary Polymer Nanoparticle Glasses, L. A. Renna, M. Bag, T. S. Gehan, X, Han, P. M. Lahti, D. Maroudas and D. Venkataraman,  J. Phys. Chem. B, 2016, 120(9), pp 2544-2556.

16.  Rapid Combinatorial Screening of Inkjet-printed Alkyl-ammonium Cations in Perovskite Solar Cells, Monojit Bag, Ziwen Jiang, Lawrance A. Renna, Seung Pyo Jeong, Vincent M. Rotello and Dhandapani Venkataraman, Mater. Lett. 2016, 164(1), pp 472-475.  

15.  Self-healing polymer sealant for encapsulating flexible solar cells, M. Bag, S. Banerjee, R. Faust and D. Venkataraman, Sol. Energ. Mater. Sol. Cells, 2016, 145(3), pp 418-422.  

14.  Understanding Interface Engineering for High-Performance Fullerene/Perovskite Planar Heterojunction Solar Cells, Yao Liu, M. Bag (equal contribution), Lawrence A. Renna, Zachariah A. Page, Paul Kim, Todd Emrick, D Venkataraman and T. P. Russell. Adv. Energ. Mater. 2016, 6(2), pp 1501606.

13.  Analysis of Organic Photovoltaic Device Performance with Active Layer Morphologies of Self-assembled Nanospheres, X. Han, M. Bag, T. S. Gehan, D. Venkataraman, and D. Maroudas, J. Phys. Chem. C, 2015, 119(46), pp 25826-25839. 

12.  Kinetics of Ion Transport in Perovskite Active Layers and its Implications for Active Layer Stability, M. Bag, L. A. Renna, R. Adhikari, S. Karak, F. Liu, P. M. Lahti, T. P. Russell, M. T. Tuominen and D. Venkataraman, J. Am. Chem. Soc. 2015, 137(40), pp 13130-13137. 

11.  Fabrication Conditions for Efficient Organic Photovoltaic Cells from Aqueous Dispersions of Nanoparticles, M. Bag, T. S. Gehan, L. A. Renna D. D. Algaier, P. M. Lahti and D. Venkataraman, RSC Advances, 2014, 4, pp 45325-45331. 

10.  Multiscale Active Layer Morphologies for Organic Photovoltaics Through Self-Assembly of Nanospheres, T. S. Gehan, M. Bag (equal contribution), L. A. Renna, X. Shen, D. D. Algaier, P. M. Lahti, T. P. Russell and D. Venkataraman,  Nano Lett., 2014, 14(9), pp 5238-5243. 

9.  Analysis of Hole Transport in Thin Films and Nanoparticle Assemblies of Poly(3-hexylthiophene), X. Han, M. Bag, T. S. Gehan, D. Venkataraman, and D. Maroudas, Chem. Phys. Lett., 2014, 610-611, pp 273-277. 

8.  Efficient charge transport in assemblies of surfactant-stabilized semiconducting nanoparticles, M. Bag, T. S. Gehan, D. D. Algaier, F. Liu, G.Nagarjuna, P. M. Lahti, T. P. Russell, and D. Venkataraman,  Adv. Mater., 2013, 25, pp 6411.   


2006-2012 (Ph.D. work)

7.  Fluctuations in photocurrent of bulk heterojunction polymer solar cells-A valuable tool to understand microscopic and degradation processes, M. Bag, N. S. Vidhyadhiraja and K. S. Narayan,  Appl. Phys. Lett., 2012 101, pp 043903. 

6.  Single-Pixel, Single-Layer Polymer Device as a Tricolor  Sensor with Signal Mimicking Natural Photoreceptors, Vini Gautam, Monojit Bag and K. S. Narayan, J. Am. Chem. Soc. 2011, 133(44), pp 17942-17949. 

5.  Dynamics of Polymer Bulk-Heterostructure-Electrolyte devices, Vini Gautam, Monojit Bag and K. S. Narayan, J. Phys. Chem. Lett., 2010, 1(22), pp 3277–3282. 

4.  Universality in Intensity Modulated Photocurrent in Bulk-Heterojunction Polymer Solar Cells, M. Bag, K. S. Narayan, Phys. Rev. B, 2010, 82, pp 075308. 

3.  Deformation of metallic liquid drop by electric field for contacts in molecular - organic electronics, M. Bag, D. Gupta, N. Arun and K. S. Narayan, Proc. R. Soc. A, 2009, 465, pp 1799-1808. 

2.  Area dependent efficiency of organic solar cells, D. Gupta, M. Bag and K. S. Narayan, Appl. Phys. Lett. 2008, 93, pp 163301. 

1.  Correlating reduced fill-factor in polymer solar cells to contact effects, D. Gupta, M. Bag and K. S. Narayan, Appl. Phys. Lett. 2008, 92, pp 093301. 



  • Hybrid Halide Perovskite Materials for Photo-active Electrodes for Photorechargeable Supercapacitors and its Method of Preparation, M. Bag, Ramesh Kumar, Application No.: 202111060124.
  • Artificial Retina Device, K. S. Narayan, V. Gautam, M. BagUS 9037251 B2
  • Artificial Retina Device, K. S. Narayan, V. Gautam, M. BagUS 9322713 B2
  • Organic Photovoltaic Devices and Methods Thereof, Dhandapani Venkataraman, Monojit Bag, Timothy S. Gehan. Christie Laurel Cutting. International Publication No.: US 20170179391 A1
Books Authored

Book Chapter:

4. J. Kumar, R. Kumar "Graphene-based nanocomposites for electro-optic devices". Current and Future Developments in Nanomaterials and Carbon Nanotubes: Application of Nanomaterials in Energy Storage and Electronics, Ed. G. Manik G., Sahoo S. K., Bentham Books. 2021 (accepted).

3. Verma S.K., Bag M. "Low-Cost Optical Pressure Sensor Using Flexible PDMS Grating". ICOL-2019. Springer Proceedings in Physics, Ed. Singh K., Gupta A.K., Khare S., Dixit N., Pant K.,  Springer Singapore. 2021. vol 258, pp-683-686. Print ISBN: 978-981-15-9258-4.

2.  M. Bag, R. Kumar, J. Kumar, "Emerging Carbon Nanomaterials for Organic and Perovskite based Optoelectronics Device Applications." Carbon Nanomaterial Electronics: Devices and Applications, Ed. A. Hazra and R. Goswami, Springer Nature Singapore Pte Ltd. 2021, 419-444. Print ISBN: 978-981-16-1051-6.

1.  M. BagP. Srivastava, "Ion Transport and Stability Issues in Organic-Inorganic Perovskite Materials." Revolution of Perovskite - Synthesis, Properties and Applications, Ed. N. Sabari Arul and V. Devaraj Nithya,  Singapore, Springer Nature Singapore Pte Ltd. 2020, 117-152. Print ISBN: 978-981-15-1266-7.