Dr. Rohit Kandulna

Scopus Publications

Investigation of Optical Characteristics in Sr3SiO5:Ce3+ Phosphor for High-Power White LEDs
Deepak Kumar Barla, Rohit Kandulna, Namita Singh, Barkha Kachhap
Bulletin of the Lebedev Physics Institute, 2026
A Sr3SiO5:Ce3+ phosphor was synthesized via a solid-state reaction and systematically characterized for its structural and optical properties. XRD analysis confirmed phase purity and tetragonal crystallinity, with slight peak shifts indicating successful Ce3+ substitution at Sr2+ sites, which also enhanced crystallinity and reduced defects. Diffuse reflectance spectra revealed an absorption edge at 275–300 nm, corresponding to a host band gap of 3.62 eV, suitable for UV excitation. Photoluminescence studies showed broad excitation (330–416 nm) and strong yellow-green emission centered at 530 nm due to Ce3+ 5d → 4f transitions. The phosphor exhibited an average decay lifetime of 46.2 ns, CIE coordinates of (0.42, 0.39), and a color purity of ~67%, highlighting its potential as a warm-white light-emitting material for LED applications.
Design and Properties Evaluation of Carbon-based Nanophotocatalysts
Rohit Kandulna, Ramesh Oraon
Photocatalysts Based on Carbon Scaffolds Environmental and Industrial Applications, 2026
Carbon scaffold-based photocatalysis has garnered a lot of attention lately as a potential solution to today's energy and environmental issues. The remarkable physicochemical and electrochemical characteristics of this technology have led to its growing popularity. The high electrical conductivity of carbon and its capacity to absorb photogenerated electrons from the photocatalyst surface make the usage of a range of carbon materials as substrates for photocatalysts. Carbon can also change photocatalytic activity in the visible spectrum. Furthermore, carbon materials offer significant advantages such as the ability to absorb CO 2 , resulting in enhanced photocatalytic reactions. Over time, conducting polymers, graphene, graphitic carbon nitride, and carbon nanotubes have all been used as better carbon supports. Although, the photo-conversion efficiency is too low for practical employment because of the rapid pace at which photo-generated charge carriers recombine and other defects in pristine carbon. Numerous studies have focused on developing novel photocatalytic materials for these processes. In addition, this chapter outlines current developments in the creation of semiconductor-based nanocomposite photocatalysts that reduce CO 2 and produce H 2 . Properly designed nanocomposites can improve charge separation and reduce recombination, leading to increased photocatalytic activity. This chapter highlights many changes made by scientists to carbon-based photocatalysts to improve their photocatalytic efficiency. Lastly, several likely restrictions have been mentioned along with the difficulties and opportunities for more research on this domain.
Correction: Assessment of dielectrical and electrochemical properties of PPY:CuO:rGO nanocomposite for organic light-emitting diodes and supercapacitor applications (Journal of Materials Science_ Materials in Electronics, (2025), 36, 5, (337), 10.1007/s10854-025-14407-9)
Rohit Kandulna, Debashish Nayak, Barkha Kachhap, Ram Bilash Choudhary
Journal of Materials Science Materials in Electronics, 2025
ZrO2-Induced Crystal Growth Mechanism of Prism-Like ZnO for Enhanced Supercapacitor and OLED Applications
Kumar Abhisek, Shashikant Shivaji Vhatkar, Helen Treasa Mathew, Rohit Kandulna, Ramesh Oraon
Crystal Growth and Design, 2025
Incorporating one nanostructured metal oxide with another seems to be an effective strategy for improving the performance of binary composites compared to pristine materials. In this work, we incorporated ZnO into ZrO 2 using a simple coprecipitation method to enhance the performance of ZrO 2 . Physicochemical features of the developed materials were thoroughly investigated through FTIR, XRD, Raman, FESEM, UV–visible spectroscopy, etc. The XRD and Raman analysis results showed the presence of tetragonal-phase ZrO 2 and hexagonal ZnO in the composite (denoted ZZC). FESEM results revealed the ZrO 2 -induced nanorod to prism-like morphological transformation of ZnO in ZZC. The J–V analysis exhibited a 115% increment in the AC conductivity compared to the pristine ones. Further, dielectric and photoluminescence (PL) analyses reflected a tremendous improvement in the dielectric properties and the radiative electron–hole recombination rate in ZZC, opening its potential application as an electron transport layer for OLED applications. The electrochemical performances of ZZC by cyclic voltammetry (CV), galvanostatic charging–discharging (GCD), and electrochemical impedance spectroscopy (EIS) (in aq 1 M KCl solution) demonstrated its enhanced energy storage capacity and lower resistance value. ZZC exhibited a maximum specific capacitance of 122.22 F/g at a current density of 1A/g, augmenting its potential application as an electrode for supercapacitors.
Polyaniline-V2O5 nanocomposite for photocatalytic efficacy in organic dye degradation and as electrode materials for supercapacitor applications
Debashish Nayak, Tusharkanta Nayak, Smita Mohanty, Akshaya K. Palai, Ram Bilash Choudhary, Rohit Kandulna
Materials Research Bulletin, 2025
Assessment of dielectrical and electrochemical properties of PPY:CuO:rGO nanocomposite for organic light-emitting diodes and supercapacitor applications
Rohit Kandulna, Debashish Nayak, Barkha Kachhap, Ram Bilash Choudhary
Journal of Materials Science Materials in Electronics, 2025
Interconnected and Layered Morphological Structure of Polycarbazole-Vanadium Pentoxide Nanocomposites for the Application of OLED as ETL Material
Rohit Kandulna, Deepak Kumar Barla, Debashish Nayak, Barkha Kachhap, Namita Singh
Journal of Inorganic and Organometallic Polymers and Materials, 2025
Synthesis and Robust Properties Evaluation of PPY-CuO Nanocomposite for Organic Light Emitting Diodes as Electron Transport Layer Material
U. Das, Rohit Kandulna, Rimpi, B. Kachhap, Janardan Choudhary
Protection of Metals and Physical Chemistry of Surfaces, 2024
Abstract The PPY–CuO nanocomposite was synthesized by chemically oxidatively polymerizing pyrrole monomer. The FESEM, TEM and XRD examination revealed the structural properties of the CuO, PPY and PPY–CuO nanocomposites. Increased radiative charge carrier recombination was observed in the PPY–CuO nanocomposite. As resistivity dropped, the recombination in radiative form increased for the PPY–CuO nanocomposite. When compared to the original CuO, the PPY–CuO nanocomposite was shown to have an improved current density of 11.36 A/cm2. It was discovered that the PPY–CuO nanocomposite had higher rates of radiative recombination, improved conductivity and electron mobility, and higher luminescence in the visible spectrum, indicating that it could be used as an electron transport layer (ETL) material in organic light emitting diodes (OLEDs).
Enriched properties of polypyrrole-copper oxide-reduced graphene oxide (PPY-CuO-rGO) hybrid nanocomposite for organic light emitting diodes (OLEDs) as electron transport layer (ETL) material
Rohit Kandulna, Rimpi, U. Das, R.B. Choudhary, B. Kachhap, A. Kumar
Optik, 2023
Properties Evaluation of PPY-CuO Incorporated GO as Electron Transporting Layer Material for OLED Application
Rimpi, R. Kandulna, U. Das, B. Kachhap
Polymer Science Series B, 2023
Abstract The chemical oxidative polymerization (COP) method was used in the lab to create the nanocomposite materials polypyrrole (PPY), reduced graphene oxide (rGO), polypyrrole-copper oxide (PPY-CuO), and polypyrrole-copper oxide-graphene oxide (PPY-CuO-GO). It was discovered by analysis of the X-Ray diffraction (XRD) results that CuO was successfully absorbed into the surface of PPY with an average crystallite size of 38 nm. The aggregation in the PPY polymer chain was accelerated by the anisotropic behavior of CuO. The conductivity of the PPY-CuO-GO nanocomposite was considerably improved, and the current density was enriched. When compared to the original PPY, the PPY-CuO-rGO nanocomposite was shown to have an improved current density of 49.20 A/cm2 and reduced band gap 1.92 eV. The PPY-CuO-rGO nanocomposite can be employed as an electron transporting layer (ETL) material for organic light emitting diodes (OLED) application due to the increased current density and high electron-hole recombination rate.
Robust optoelectronic properties of PANI-Y2O3nanocomposite as electron transport layer in OLEDs
Gobind Mandal, R. B. Choudhary, R. Kandulna, Ajeet Verma, Debashish Nayak
Aip Conference Proceedings, 2020
Robust Properties of PPY-TiO2-rGO Nanocomposite As Electron Transporting Layer Material for the Application in OLED Devices
R. Kandulna, R.B. Choudhary, R. Singh
Materials Today Proceedings, 2020
Optical band gap tuning and thermal properties of PMMA-ZnO sensitized polymers for efficient exciton generation in solar cell application
Rajinder Singh, Ram Bilash Choudhary, Rohit Kandulna
Materials Science in Semiconductor Processing, 2019
Robust optical and electrical properties of TiO 2 -sensitized polymeric (PANI – TiO 2) nanocomposites for hybrid solar cell application
Rajinder Singh, Ram Bilash Choudhary, Rohit Kandulna
Bulletin of Materials Science, 2019
Remarkable enhancement in electrochemical capacitance value of Ag-ZnO/PANI composite for supercapacitor application
B. Purty, R. B. Choudhary, R. Kandulna, R. Singh
Aip Conference Proceedings, 2019
Augmented properties for PPY-PANI-ZnO nanocomposite as electron transport layer material for organic light emitting diode (OLED) application
R. Kandulna, R. B. Choudhary, R. Singh, D. Nayak
Aip Conference Proceedings, 2019
2-D rGO impregnated circular-tetragonal-bipyramidal structure of PPY-TiO 2 -rGO nanocomposite as ETL for OLED and supercapacitor electrode materials
R.B. Choudhary, R. Kandulna
Materials Science in Semiconductor Processing, 2019
Free Exciton Absorptions and Quasi-reversible Redox Actions in Polypyrrole–Polyaniline–Zinc Oxide Nanocomposites as Electron Transporting Layer for Organic Light Emitting Diode and Electrode Material for Supercapacitors
R. Kandulna, R. B. Choudhary, R. Singh
Journal of Inorganic and Organometallic Polymers and Materials, 2019
Investigation of structural, optical and electrical performance of ZnS sensitized PMMA nanocomposite as an emissive layer for OLED application
Debashish Nayak, R. B. Choudhary, R. Kandulna, G. Mandal
Aip Conference Proceedings, 2019
Concentration-dependent behaviors of ZnO-reinforced PVA–ZnO nanocomposites as electron transport materials for OLED application
R. Kandulna, R. B. Choudhary
Polymer Bulletin, 2018
Optical band gap tuning and electrical properties of polyaniline and its nanocomposites for hybrid solar cell application
R. Singh, R. B. Choudhary, R. Kandulna
Aip Conference Proceedings, 2018
Binder free MnO2/PIn electrode material for supercapacitor application
B. Purty, R. B. Choudhary, R. Kandulna, R. Singh
Aip Conference Proceedings, 2018
TiO2 reinforced PMMA-TiO2 nanocomposite for its application in organic light emitting diode (OLED) as electron transport layer material
R. Kandulna, R. B. Choudhary, R. Singh
Aip Conference Proceedings, 2018
PMMA–TiO2 based polymeric nanocomposite material for electron transport layer in OLED application
R. Kandulna, R. B. Choudhary, R. Singh, B. Purty
Journal of Materials Science Materials in Electronics, 2018
Delocalization of π electrons and trapping action of ZnO nanoparticles in PPY matrix for hybrid solar cell application
Rajinder Singh, Ram Bilash Choudhary, Rohit Kandulna
Journal of Molecular Structure, 2018
Ag-doped ZnO Reinforced Polymeric Ag:ZnO/PMMA Nanocomposites as Electron Transporting Layer for OLED Application
R. Kandulna, R. B. Choudhary, P. Maji
Journal of Inorganic and Organometallic Polymers and Materials, 2017
Robust electron transport properties of PANI/PPY/ZnO polymeric nanocomposites for OLED applications
R. Kandulna, R.B. Choudhary
Optik, 2017

RECENT SCHOLAR PUBLICATIONS

Design and Properties Evaluation of Carbon‐based Nanophotocatalysts
R Kandulna, R Oraon
Photocatalysts based on Carbon Scaffolds: Environmental and Industrial … , 2026
2026
Investigation of Optical Characteristics in Sr 3 SiO 5 :Ce 3+ Phosphor for High-Power White LEDs
DK Barla, R Kandulna, N Singh, B Kachhap
Bulletin of the Lebedev Physics Institute 53 (2), 57-66 , 2026
2026
Interconnected and Layered Morphological Structure of Polycarbazole-Vanadium Pentoxide Nanocomposites for the Application of OLED as ETL Material
R Kandulna, DK Barla, D Nayak, B Kachhap, N Singh
Journal of Inorganic and Organometallic Polymers and Materials, 1-16 , 2025
2025
ZrO 2 -Induced Crystal Growth Mechanism of Prism-Like ZnO for Enhanced Supercapacitor and OLED Applications
K Abhisek, SS Vhatkar, HT Mathew, R Kandulna, R Oraon
Crystal Growth & Design 25 (13), 4795-4810 , 2025
2025
Citations: 4
Polyaniline-V2O5 nanocomposite for photocatalytic efficacy in organic dye degradation and as electrode materials for supercapacitor applications
D Nayak, T Nayak, S Mohanty, AK Palai, RB Choudhary, R Kandulna
Materials Research Bulletin 184, 113277 , 2025
2025
Citations: 5
Assessment of dielectrical and electrochemical properties of PPY: CuO: rGO nanocomposite for organic light-emitting diodes and supercapacitor applications
R Kandulna, D Nayak, B Kachhap, RB Choudhary
Journal of Materials Science: Materials in Electronics 36 (5), 337 , 2025
2025
Citations: 10
Synthesis and Robust Properties Evaluation of PPY-CuO Nanocomposite for Organic Light Emitting Diodes as Electron Transport Layer Material
U Das, R Kandulna, Rimpi, B Kachhap, J Choudhary
Protection of Metals and Physical Chemistry of Surfaces 60 (4), 661-667 , 2024
2024
Enriched properties of polypyrrole-copper oxide-reduced graphene oxide (PPY-CuO-rGO) hybrid nanocomposite for organic light emitting diodes (OLEDs) as electron transport layer …
R Kandulna, U Das, RB Choudhary, B Kachhap, A Kumar
Optik 292, 171393 , 2023
2023
Citations: 13
Properties Evaluation of PPY-CuO Incorporated GO as Electron Transporting Layer Material for OLED Application
Rimpi, R Kandulna, U Das, B Kachhap
Polymer Science, Series B 65 (5), 700-705 , 2023
2023
Citations: 1
Robust optoelectronic properties of PANI-Y 2 O 3 nanocomposite as electron transport layer in OLEDs
G Mandal, RB Choudhary, R Kandulna, A Verma, D Nayak
AIP Conference Proceedings 2220 (1), 020085 , 2020
2020
Citations: 4
Robust Properties Of PPY-TiO2-rGO Nanocomposite As Electron Transporting Layer Material For The Application In OLED Devices
R Kandulna, RB Choudhary, R Singh
Materials Today: Proceedings 24, 859-868 , 2020
2020
Citations: 1
Optical band gap tuning and thermal properties of PMMA-ZnO sensitized polymers for efficient exciton generation in solar cell application
R Singh, RB Choudhary, R Kandulna
Materials Science in Semiconductor Processing 103, 104623 , 2019
2019
Citations: 20
Robust optical and electrical properties of -sensitized polymeric – nanocomposites for hybrid solar cell application
R Singh, RB Choudhary, R Kandulna
Bulletin of Materials Science 42 (5), 202 , 2019
2019
Citations: 2
Remarkable enhancement in electrochemical capacitance value of Ag-ZnO/PANI composite for supercapacitor application
B Purty, RB Choudhary, R Kandulna, R Singh
AIP Conference Proceedings 2115 (1), 030588 , 2019
2019
Citations: 11
Augmented properties for PPY-PANI-ZnO nanocomposite as electron transport layer material for organic light emitting diode (OLED) application
R Kandulna, RB Choudhary, R Singh, D Nayak
AIP Conference Proceedings 2115 (1), 030439 , 2019
2019
Citations: 3
Free exciton absorptions and quasi-reversible redox actions in polypyrrole–polyaniline–zinc oxide nanocomposites as electron transporting layer for organic light emitting diode …
R Kandulna, RB Choudhary, R Singh
Journal of Inorganic and Organometallic Polymers and Materials 29 (3), 730-744 , 2019
2019
Citations: 39
2-D rGO impregnated circular-tetragonal-bipyramidal structure of PPY-TiO2-rGO nanocomposite as ETL for OLED and supercapacitor electrode materials
RB Choudhary, R Kandulna
Materials Science in Semiconductor Processing 94, 86-96 , 2019
2019
Citations: 35
Investigation of structural, optical and electrical performance of ZnS sensitized PMMA nanocomposite as an emissive layer for OLED application
D Nayak, RB Choudhary, R Kandulna, G Mandal
AIP conference proceedings 2100 (1), 020017 , 2019
2019
Citations: 5
Synthesis and Characterization of PPY-PANI-ZnO Hybrid Nanocomposites for OLEDs Applications as Electron Transport Layer
R Kandulna, R B Choudhary, R Singh
Advanced Materials Proceedings 4 (2), 72-76 , 2019
2019
Citations: 1
Concentration-dependent behaviors of ZnO-reinforced PVA–ZnO nanocomposites as electron transport materials for OLED application
R Kandulna, RB Choudhary
Polymer Bulletin 75 (7), 3089-3107 , 2018
2018
Citations: 99

MOST CITED SCHOLAR PUBLICATIONS

Concentration-dependent behaviors of ZnO-reinforced PVA–ZnO nanocomposites as electron transport materials for OLED application
R Kandulna, RB Choudhary
Polymer Bulletin 75 (7), 3089-3107 , 2018
2018
Citations: 99
Robust electron transport properties of PANI/PPY/ZnO polymeric nanocomposites for OLED applications
R Kandulna, RB Choudhary
Optik 144, 40-48 , 2017
2017
Citations: 77
PMMA–TiO 2 based polymeric nanocomposite material for electron transport layer in OLED application
R Kandulna, RB Choudhary, R Singh, B Purty
Journal of Materials Science: Materials in Electronics 29 (7), 5893-5907 , 2018
2018
Citations: 56
Free exciton absorptions and quasi-reversible redox actions in polypyrrole–polyaniline–zinc oxide nanocomposites as electron transporting layer for organic light emitting diode …
R Kandulna, RB Choudhary, R Singh
Journal of Inorganic and Organometallic Polymers and Materials 29 (3), 730-744 , 2019
2019
Citations: 39
Ag-doped ZnO reinforced polymeric Ag: ZnO/PMMA nanocomposites as electron transporting layer for OLED application
R Kandulna, RB Choudhary, P Maji
Journal of Inorganic and Organometallic Polymers and Materials 27 (6), 1760-1769 , 2017
2017
Citations: 39
2-D rGO impregnated circular-tetragonal-bipyramidal structure of PPY-TiO2-rGO nanocomposite as ETL for OLED and supercapacitor electrode materials
RB Choudhary, R Kandulna
Materials Science in Semiconductor Processing 94, 86-96 , 2019
2019
Citations: 35
Delocalization of π electrons and trapping action of ZnO nanoparticles in PPY matrix for hybrid solar cell application
R Singh, RB Choudhary, R Kandulna
Journal of Molecular Structure 1156, 633-644 , 2018
2018
Citations: 33
Optical band gap tuning and thermal properties of PMMA-ZnO sensitized polymers for efficient exciton generation in solar cell application
R Singh, RB Choudhary, R Kandulna
Materials Science in Semiconductor Processing 103, 104623 , 2019
2019
Citations: 20
Enriched properties of polypyrrole-copper oxide-reduced graphene oxide (PPY-CuO-rGO) hybrid nanocomposite for organic light emitting diodes (OLEDs) as electron transport layer …
R Kandulna, U Das, RB Choudhary, B Kachhap, A Kumar
Optik 292, 171393 , 2023
2023
Citations: 13
Remarkable enhancement in electrochemical capacitance value of Ag-ZnO/PANI composite for supercapacitor application
B Purty, RB Choudhary, R Kandulna, R Singh
AIP Conference Proceedings 2115 (1), 030588 , 2019
2019
Citations: 11
Assessment of dielectrical and electrochemical properties of PPY: CuO: rGO nanocomposite for organic light-emitting diodes and supercapacitor applications
R Kandulna, D Nayak, B Kachhap, RB Choudhary
Journal of Materials Science: Materials in Electronics 36 (5), 337 , 2025
2025
Citations: 10
Binder free MnO 2 /PIn electrode material for supercapacitor application
B Purty, RB Choudhary, R Kandulna, R Singh
AIP Conference Proceedings 1953 (1), 030178 , 2018
2018
Citations: 10
Polyaniline-V2O5 nanocomposite for photocatalytic efficacy in organic dye degradation and as electrode materials for supercapacitor applications
D Nayak, T Nayak, S Mohanty, AK Palai, RB Choudhary, R Kandulna
Materials Research Bulletin 184, 113277 , 2025
2025
Citations: 5
Investigation of structural, optical and electrical performance of ZnS sensitized PMMA nanocomposite as an emissive layer for OLED application
D Nayak, RB Choudhary, R Kandulna, G Mandal
AIP conference proceedings 2100 (1), 020017 , 2019
2019
Citations: 5
ZrO 2 -Induced Crystal Growth Mechanism of Prism-Like ZnO for Enhanced Supercapacitor and OLED Applications
K Abhisek, SS Vhatkar, HT Mathew, R Kandulna, R Oraon
Crystal Growth & Design 25 (13), 4795-4810 , 2025
2025
Citations: 4
Robust optoelectronic properties of PANI-Y 2 O 3 nanocomposite as electron transport layer in OLEDs
G Mandal, RB Choudhary, R Kandulna, A Verma, D Nayak
AIP Conference Proceedings 2220 (1), 020085 , 2020
2020
Citations: 4
Augmented properties for PPY-PANI-ZnO nanocomposite as electron transport layer material for organic light emitting diode (OLED) application
R Kandulna, RB Choudhary, R Singh, D Nayak
AIP Conference Proceedings 2115 (1), 030439 , 2019
2019
Citations: 3
Robust optical and electrical properties of -sensitized polymeric – nanocomposites for hybrid solar cell application
R Singh, RB Choudhary, R Kandulna
Bulletin of Materials Science 42 (5), 202 , 2019
2019
Citations: 2
TiO 2 reinforced PMMA-TiO 2 nanocomposite for its application in organic light emitting diode (OLED) as electron transport layer material
R Kandulna, RB Choudhary, R Singh
AIP Conference Proceedings 1942 (1), 110057 , 2018
2018
Citations: 2
Properties Evaluation of PPY-CuO Incorporated GO as Electron Transporting Layer Material for OLED Application
Rimpi, R Kandulna, U Das, B Kachhap
Polymer Science, Series B 65 (5), 700-705 , 2023
2023
Citations: 1

Dr. Rohit Kandulna

RESEARCH, TEACHING, or OTHER INTERESTS

Scopus Publications

RECENT SCHOLAR PUBLICATIONS

MOST CITED SCHOLAR PUBLICATIONS