Prof. Pradosh Prakash Sahay

Scopus Publications

Enhancement in Photoluminescence and Photocatalytic Performances of Solution Combustion Synthesized ZnO Nanoparticles upon Sm Doping
Nikita Sharma, Pradosh Prakash Sahay
Physica Status Solidi A Applications and Materials Science, 2025
This study explores the synthesis of ZnO nanoparticles through a solution‐combustion route, examining their structural, photoluminescent, and photocatalytic properties upon introducing Sm as a dopant. All synthesized samples display a hexagonal wurtzite structure, with crystallite sizes between 55 and 73 nm. Field‐emission scanning electron microscopy reveals significant sample morphological variation. Diffuse reflectance spectroscopy indicates that doping with Sm3+ results in a slight decrease in the bandgap energy. The photoluminescence (PL) emission spectra at excitation wavelengths of 325, 350, and 390 nm show broad emission bands spanning from the violet to the green regions of the visible spectrum, attributed to defects in ZnO. Additionally, the PL intensity increases with Sm doping up to 2 mol% Sm, after which it declines. The photocatalytic degradation efficiency improves upon Sm doping up to 3 mol% and thereafter decreases.
Modification in the Microstructural and Photoluminescence Characteristics of Zn3(VO4)2 Phosphors upon Cerium Doping
Nikita Sharma, P. P. Sahay
Springer Proceedings in Materials, 2025
Synthesis and Characterization of Ce3+-Activated Orthovanadate Oxides M3(VO4)2 (M: Ni or Co) for Their Photocatalytic Performances
Nikita Sharma, P. P. Sahay
Chemistry Africa, 2024
Investigation of structural, optical, and photoluminescence properties of Ce3+ activated zinc vanadate nanoparticles
Nikita Sharma, P. P. Sahay
Applied Physics A Materials Science and Processing, 2024
Characterization of Ce3+ and Eu3+ doped and co-doped ZnO nanoparticles for luminescence applications
Nikita Sharma, P P Sahay
Physica Scripta, 2024
This paper investigates the synthesis of Ce3+ and Eu3+ doped, as well as co-doped ZnO nanoparticles using the solution combustion route. The nanoparticles exhibit a hexagonal wurtzite structure of ZnO with crystallite sizes ranging from 19 to 22 nm. Structural parameters, including lattice constants, bond lengths, and bond angles, are evaluated. Morphological diversity is observed in field-emission scanning electron microscopy images. The diffuse reflectance spectroscopy results reveal an energy band gap of 3.20 eV for undoped ZnO nanoparticles. The energy band gap value slightly decreases for Eu-doped ZnO and certain (Ce, Eu) co-doped ZnO nanoparticles. Photoluminescence (PL) excitation peaks are attributed to energy levels of native defects in the ZnO band gap, along with f–d and f–f transitions of rare-earth ions (Ce3+, Eu3+). The PL emission spectra under different excitation wavelengths (350 nm, 394 nm, and 465 nm) display varied peak positions. ZnO co-doped with 0.96 mol% of Ce3+ and 0.92 mol% of Eu3+ emerges as a promising material for luminescence applications, exhibiting a significant increase in green emission intensity. Consequently, this study represents a novel contribution to the field of ZnO-based luminescent materials.
Structural, photoluminescence, and photocatalytic performances of Ce3+-activated orthovanadate oxides M3(VO4)2 (M: Mg or Zn) synthesized by solution combustion route
Nikita Sharma, Pradosh Prakash Sahay
Luminescence, 2024
This paper presents a research investigation into the synthesis of vanadate oxides M3(VO4)2 (M: Mg or Zn) using the solution combustion method and investigates their structural, photoluminescence, and photocatalytic properties after introducing cerium (Ce) as a dopant. The resulting synthesized samples all display an orthorhombic crystalline structure with crystallite sizes ranging from 71 to 110 nm. Morphological diversity among the samples is revealed through field‐emission scanning electron microscopy (FESEM) imagery. Diffuse reflectance spectroscopy discloses that the introduction of Ce3+ as a dopant leads to an increase in the band gap energy. Notably, when excited at a wavelength of 340 nm, the photoluminescence emission intensity reaches its peak across all samples. This intensity undergoes enhancement due to Ce3+ doping, causing a slight shift toward shorter wavelengths attributable to the augmented band gap resulting from the dopant. Markedly, among the investigated materials, Ce3+‐activated Mg3(VO4)2 stands out with the most pronounced emission intensity, positioning it as a highly promising luminescent material. Additionally, the incorporation of Ce3+ has a positive effect on the photocatalytic performance of Mg3(VO4)2, resulting in notable improvement.
Improved transparent conductive properties of highly c-axis oriented ZnO thin films upon (Ga, Mg) co-doping
Aradhana Tiwari, P.P. Sahay
Micro and Nanostructures, 2023
Solution combustion synthesis of Dy-doped ZnO nanoparticles: An investigation of their structural, optical and photoluminescence characteristics
Nikita Sharma, P.P. Sahay
Journal of Luminescence, 2023
Effect of (Ce, Dy) co-doping on the microstructural, optical, and photoluminescence characteristics of solution combustion synthesized ZnO nanoparticles
Nikita Sharma, Pradosh Prakash Sahay
Luminescence, 2023
Solution combustion synthesized ZnO nanoparticles with Ce, Dy doped and co-doped with varying dopant concentrations were characterized for their microstructural, optical and photoluminescence characteristics. The synthesized nanoparticles have been found to match the standard hexagonal wurtzite structure of ZnO. The lattice fringes in the high-resolution transmission electron micrographs and the bright spotty rings in the selected area electron diffraction pattern authenticate the high crystallinity of the nanoparticles. The diffuse reflectance spectroscopy provides the energy bandgap for the undoped ZnO to be 3.18 eV, decreasing upon doping and co-doping. A sharp narrow UV emission peak at ~ 398 nm originating from the excitonic recombination is found in the PL spectra of the nanoparticles. The visible emission peaks in the PL spectra are assigned to f-d and f-f electron transitions of Ce3+ and Dy3+ ions, respectively, in addition to different native defects in ZnO. The visible emissions (blue, yellow and red) have been found to improve upon (Ce, Dy) co-doping, and therefore (Ce, Dy) co-doped ZnO nanoparticles can be considered as a promising luminescent material for the development of energy-saving light sources.
Cation-cation co-doped ZnO thin films for transparent conductive oxide applications
Aradhana Tiwari, P.P. Sahay
Materials Today Proceedings, 2023
Solution combustion synthesized Y2O3 nanoparticles and influence of Dy doping on their microstructural, optical, and photoluminescence characteristics
Nikita Sharma, Pradosh Prakash Sahay
Journal of the Chinese Chemical Society, 2023
Highly c-axis oriented (Mg, Sn) co-doped ZnO thin films for optoelectronic applications
Aradhana Tiwari, P.P. Sahay
Optical Materials, 2022
Impact of Heterovalent Cations (Ga, Co) Co-doping on the Physical Properties of ZnO Films for Optoelectronic Applications
Aradhana Tiwari, P. P. Sahay
Brazilian Journal of Physics, 2022
Precursor-Dependent Spray-Pyrolyzed Co3O4 Thin Films: Comparative Results on Their Structural, Optical, and Electrical Properties
Anil Kumar, P. P. Sahay
Brazilian Journal of Physics, 2022
Modification in the physical properties of nanocrystalline ZnO thin films by Sn/Ni co-doping for transparent conductive oxide applications
Aradhana Tiwari, P.P. Sahay
Physica B Condensed Matter, 2022
Structural and optical behavior of gallium and cobalt co-doped ZnO thin films fabricated by a sol-gel spin coating technique
Aradhana Tiwari, P.P. Sahay
Materials Today Proceedings, 2022
Galvanostatically deposited Co3O4–NiO nanocomposite thin films onto FTO glass substrates: An investigation of their microstructural and supercapacitive properties
P.P. Sahay
Journal of Alloys and Compounds, 2021
Lithium doping in spray-pyrolyzed NiO thin films: results on their microstructural, optical and electrochromic properties
Anil Kumar, P. P. Sahay
Applied Physics A Materials Science and Processing, 2021
The effects of Sn–In co-doping on the structural, optical, photoluminescence and electrical characteristics of the sol-gel processed ZnO thin films
Aradhana Tiwari, P.P. Sahay
Optical Materials, 2020
Sn–Ga co-doping in sol-gel derived ZnO thin films: Studies of their microstructural, optical, luminescence and electrical properties
Aradhana Tiwari, P.P. Sahay
Materials Science in Semiconductor Processing, 2020
Synthesis, characterizations, and magnetic properties of FeCoNiTi-based high-entropy alloys
Rajesh K. Mishra, Rohit R. Shahi, Amit Raj Singh, P. P. Sahay
Emergent Materials, 2020
Influence of Ti doping on the microstructural and electrochromic properties of dip-coated nanocrystalline V2O5 thin films
Anil Kumar, P. P. Sahay
Journal of Sol Gel Science and Technology, 2020
Results on the microstructural, optical and electrochromic properties of spray-deposited MoO3 thin films by the influence of W doping
Anil Kumar, Chandra Shekhar Prajapati, P.P. Sahay
Materials Science in Semiconductor Processing, 2019
Microstructural, optical and electrochromical properties of W-doped Nb2O5 thin films prepared by dip-coating process using sols obtained by the chloroalkoxide route
Anil Kumar, P. P. Sahay
Journal of Materials Science Materials in Electronics, 2019
Modification in the microstructural and electrochromic properties of spray-pyrolysed WO3 thin films upon Mo doping
Anil Kumar, Chandra Shekhar Prajapati, P. P. Sahay
Journal of Sol Gel Science and Technology, 2019
Alloying, magnetic and corrosion behavior of AlCrFeMnNiTi high entropy alloy
Rajesh K. Mishra, P. P. Sahay, Rohit R. Shahi
Journal of Materials Science, 2019
Supercapacitive performance of electrochemically synthesized nanocrystalline MnO2 films using different plating solutions: A comparative study
Rajesh Kumar Mishra, Chandra Shekhar Prajapati, P.P. Sahay
Journal of Alloys and Compounds, 2018
Influence of electrodeposition modes on the electrochemical performance of MnO2 films prepared using anionic MnO4− (Mn7+) precursor
R.K. Mishra, C.S. Prajapati, R.R. Shahi, A.K. Kushwaha, P.P. Sahay
Ceramics International, 2018
Electrochemical supercapacitive performance of potentiostatically cathodic electrodeposited nanostructured MnO2 films
P.P. Sahay, Ajay Kumar Kushwaha
Journal of Solid State Electrochemistry, 2017
Nanocube In2O3@RGO heterostructure based gas sensor for acetone and formaldehyde detection
Rajneesh Kumar Mishra, G. Murali, Tae-Hyung Kim, Jee Hun Kim, Young Jin Lim, Byoung-Suhk Kim, P. P. Sahay, Seung Hee Lee
Rsc Advances, 2017
Cr-doped WO3 nanosheets: Structural, optical and formaldehyde sensing properties
S.B. Upadhyay, R.K. Mishra, P.P. Sahay
Ceramics International, 2016
Improved electrochromic performance in sprayed WO3 thin films upon Sb doping
Ramnayan Mukherjee, P.P. Sahay
Journal of Alloys and Compounds, 2016
Structure, Optical and Formaldehyde Sensing Properties of Co-Precipitated Fe-Doped WO3 Nanomaterials
S. B. Upadhyay, P. P. Sahay
Nano, 2015
Cr-induced modifications in the structural, photoluminescence and acetone-sensing behaviour of hydrothermally synthesised SnO2 nanoparticles
R.K. Mishra, Ajay Kushwaha, P.P. Sahay
Journal of Experimental Nanoscience, 2015
Effect of precursors on the microstructural, optical, electrical and electrochromic properties of WO3 nanocrystalline thin films
Ramnayan Mukherjee, P. P. Sahay
Journal of Materials Science Materials in Electronics, 2015
SnO2 quantum dots decorated on RGO: a superior sensitive, selective and reproducible performance for a H2 and LPG sensor
R. K. Mishra, S. B. Upadhyay, Ajay Kushwaha, Tae-Hyung Kim, G. Murali, Ranjana Verma, Manish Srivastava, Jay Singh, P. P. Sahay, Seung Hee Lee
Nanoscale, 2015
Structural, morphological, optical and electrical properties of spray-deposited Sb-doped WO3 nanocrystalline thin films prepared using ammonium tungstate precursor
Ramnayan Mukherjee, P. P. Sahay
Journal of Materials Science Materials in Electronics, 2015
Enhanced acetone response in co-precipitated WO3 nanostructures upon indium doping
S.B. Upadhyay, R.K. Mishra, P.P. Sahay
Sensors and Actuators B Chemical, 2015
Tin-Incorporation Induced Changes in the Microstructural, Optical, and Electrical Behavior of Tungsten Oxide Nanocrystalline Thin Films Grown Via Spray Pyrolysis
Ramnayan Mukherjee, C. S. Prajapati, P. P. Sahay
Journal of Thermal Spray Technology, 2014
Structural and alcohol response characteristics of Sn-doped WO3 nanosheets
S.B. Upadhyay, R.K. Mishra, P.P. Sahay
Sensors and Actuators B Chemical, 2014
Tailoring the microstructural, optical, and electrical properties of nanocrystalline WO3 thin films using Al doping
Ramnayan Mukherjee, C. S. Prajapati, P. P. Sahay
Journal of Materials Engineering and Performance, 2014
Influence of Cu doping on the structural, photoluminescence and formaldehyde sensing properties of SnO2 nanoparticles
R. K. Mishra, Ajay Kushwaha, P. P. Sahay
Rsc Advances, 2014
Spray-deposited nanocrystalline WO3 thin films prepared using tungsten hexachloride dissolved in N-N dimethylformamide and influence of in doping on their structural, optical and electrical properties
Ramnayan Mukherjee, Ajay Kushwaha, P. P. Sahay
Electronic Materials Letters, 2014
Optoelectronics and formaldehyde sensing properties of tin-doped ZnO thin films
C. S. Prajapati, Ajay Kushwaha, P. P. Sahay
Applied Physics A Materials Science and Processing, 2013
Structural, optical and ethanol gas-sensing properties of zinc oxide thin film prepared by spray pyrolysis technique using ultrasonic nebuliser
Indian Journal of Pure and Applied Physics, 2013
Effect of Al dopants on the structural, optical and gas sensing properties of spray-deposited ZnO thin films
C.S. Prajapati, Ajay Kushwaha, P.P. Sahay
Materials Chemistry and Physics, 2013
Experimental investigation of spray-deposited Fe-Doped ZnO nanoparticle thin films: Structural, microstructural, and optical properties
C. S. Prajapati, Ajay Kushwaha, P. P. Sahay
Journal of Thermal Spray Technology, 2013
Influence of in doping on the structural, photo-luminescence and alcohol response characteristics of the SnO2 nanoparticles
R.K. Mishra, Shiv K. Pandey, P.P. Sahay
Materials Research Bulletin, 2013
Volatile organic compounds (VOCs) Response characteristics of the hydrothermally synthesized sno2 nanocapsules
R. K. Mishra, S. B. Upadhyay, P. P. Sahay
Sensor Letters, 2013
Sn-doped in2O3 nanocrystalline thin films deposited by spray pyrolysis: Microstructural, optical, electrical, and formaldehyde-sensing characteristics
N. G. Pramod, S. N. Pandey, P. P. Sahay
Journal of Thermal Spray Technology, 2013
Influence of Fe doping on the structural, optical and acetone sensing properties of sprayed ZnO thin films
C.S. Prajapati, Ajay Kushwaha, P.P. Sahay
Materials Research Bulletin, 2013
Structural, dielectric and photoluminescence properties of co-precipitated Zn-doped SnO2 nanoparticles
P.P. Sahay, R.K. Mishra, S.N. Pandey, S. Jha, M. Shamsuddin
Current Applied Physics, 2013
Influence of in doping on the structural, optical and acetone sensing properties of ZnO nanoparticulate thin films
C.S. Prajapati, P.P. Sahay
Materials Science in Semiconductor Processing, 2013
Zn-doped and undoped SnO 2 nanoparticles: A comparative structural, optical and LPG sensing properties study
R.K. Mishra, P.P. Sahay
Materials Research Bulletin, 2012
Structural, optical and methanol sensing properties of sprayed In 2O 3 nanoparticle thin films
N.G. Pramod, S.N. Pandey, P.P. Sahay
Ceramics International, 2012
Synthesis, characterization and alcohol sensing property of Zn-doped SnO 2 nanoparticles
R.K. Mishra, P.P. Sahay
Ceramics International, 2012
AC transport properties of nanocrystalline SnO 2 semiconductor
P.P. Sahay, R.K. Mishra, S.N. Pandey, S. Jha, M. Shamsuddin
Ceramics International, 2012
Effect of precursors on structure, optical and electrical properties of chemically deposited nanocrystalline ZnO thin films
C.S. Prajapati, P.P. Sahay
Applied Surface Science, 2012
Alcohol-sensing characteristics of spray deposited ZnO nano-particle thin films
C.S. Prajapati, P.P. Sahay
Sensors and Actuators B Chemical, 2011
Studies on metal-oxide semiconductor ZnO as a hydrogen gas sensor
Journal of Nano and Electronic Physics, 2011
Growth, structure and optical characterization of Al-doped ZnO nanoparticle thin films
C. S. Prajapati, P. P. Sahay
Crystal Research and Technology, 2011
Sensing of LPG with nanostructured zinc oxide thin films grown by spray pyrolysis technique
C.S. Prajapati, S.N. Pandey, P.P. Sahay
Physica B Condensed Matter, 2011
Structural, dielectric, and electrical studies on thermally evaporated CdTe thin films
S. Tewari, A. Bhattacharjee, P. P. Sahay
Journal of Materials Science, 2009
Al-doped ZnO thin films as methanol sensors
P.P. Sahay, R.K. Nath
Sensors and Actuators B Chemical, 2008
Al-doped zinc oxide thin films for liquid petroleum gas (LPG) sensors
P.P. Sahay, R.K. Nath
Sensors and Actuators B Chemical, 2008
Studies on ac response of zinc oxide pellets
P. P. Sahay, S. Tewari, R. K. Nath, S. Jha, M. Shamsuddin
Journal of Materials Science, 2008
Optical and electrical studies on spray deposited ZnO thin films
P. P. Sahay, S. Tewari, R. K. Nath
Crystal Research and Technology, 2007
Optical properties of thermally evaporated CdS thin films
P. P. Sahay, R. K. Nath, S. Tewari
Crystal Research and Technology, 2007
Sprayed ZnO thin films for ethanol sensors
P. P. Sahay, S. Tewari, S. Jha, M. Shamsuddin
Journal of Materials Science, 2005
Zinc oxide thin film gas sensor for detection of acetone
P. P. Sahay
Journal of Materials Science, 2005
On the electrical conductivity of thermally evaporated CdS thin films
P. P. Sahay, S. Jha, M. Shamsuddin
Journal of Materials Science Letters, 2002
Effect of thermal annealing on the electrical behaviour of CdTe thin films
Proceedings of SPIE the International Society for Optical Engineering, 2002
Electrical properties of vacuum-evaporated CdTe thin films
P. P. Sahay, S. Jha, M. Shamsuddin
Journal of Materials Science Letters, 2001
Contribution of the interface state continuum to the non-linearities of Schottky (I-V) characteristics
Proceedings of SPIE the International Society for Optical Engineering, 1998
Electrical characterization of semiconducting polycrystalline GaxIn(1-x)Sb alloys
P. P. Sahay, M. Shamsuddin, R. S. Srivastava
Journal of Materials Science, 1992
Hydrogenation effects on Ni/n-Si (111) Schottky diode characteristics
P. P. Sahay, M. Shamsuddin, R. S. Srivastava
Proceedings of SPIE the International Society for Optical Engineering, 1992
Electrical characterization of interface states in Ni/n-Si(111) Schottky diodes from (C-V) characteristics
P.P. Sahay, M. Shamsuddin, R.S. Srivastava
Microelectronics Journal, 1992
Transport properties of semiconducting GaxIn1-xSb solid solutions
T. K. S. P. Gupta, P. P. Sahay, M. Shamsuddin, P. Ramachandrarao
Proceedings of SPIE the International Society for Optical Engineering, 1992
Role of hydrogen in interface states parameters of Ni/n-Si (111) Schottky diodes: (c-v) studies
P. P. Sahay, M. Shamsuddin, R. S. Srivastava
Journal of Materials Science Letters, 1991
Effects of hydrogenation on the electrical characteristics of Ni/n-Si(111) Schottky diodes
P.P. Sahay, M. Shamsuddin, R.S. Srivastava
Solid State Electronics, 1991
Characterization of interface states at Ni/n‐Si Schottky barriers from I – V characteristics
P. P. Sahay, R. S. Srivastava
Crystal Research and Technology, 1990

Prof. Pradosh Prakash Sahay

RESEARCH INTERESTS

Scopus Publications