Impact of Cu Concentration on Optical Properties of CIS and CIS/ZnS Core–Shell QDs Priya Chandra, K. S. Ojha Physica Status Solidi A Applications and Materials Science, 2026 In this study, the impact of Cu:In proportions was thoroughly investigated on the structural and optical properties of CuInS 2 (CIS) quantum dots (QDs) developed through an affordable solvothermal process. Among the various Cu/In compositions, the 1:2 proportion of Cu and In showed an enhanced quantum yield (QY) of 46%. In addition, the effect of excitation wavelength on the photoluminescence properties of CIS QDs was investigated and reported. To further enhance the QY of CIS QDs for QLED applications, CIS/ZnS core/shell QDs were prepared using the optimized Cu/In proportion (1:2) of CIS, and a QY of 86% has been achieved.
Temporal evolution of optical and photocatalytic properties of hydrothermally synthesized EDTA-encapsulated CdS spherical nanostructures Labhesh Baid, K.S. Ojha Chemical Physics Impact, 2024 EDTA encapsulated CdS spherical nanocrystals have been prepared via hydrothermal approach at three different reaction times 16 h, 20 h, and 24 h. The XRD investigation confirms the formation of cubic and hexagonal mixed phase of CdS while HRSEM image validates the synthesis of spherical nanocrystals. The EDX spectra confirm the purity of the samples. The optical properties have been studied using UV–Vis and photoluminescence spectroscopic techniques. The PL spectrum at 20 h reaction time shows utmost intensity. The vibrational properties of the synthesized CdS samples have been investigated using FTIR technique in the range of 500 – 4000 cm −1 . The photocatalytic properties of EDTA@CdS spherical nanocrystals to degrade methyl blue dye have been studied under sunlight.
Optical and vibrational properties of Ni doped ZnSe nanospheres S.M. Saini, K.S. Ojha Optik, 2021 Ni doped ZnSe nanospheres in presence of PVA have been synthesized via a cost effective and simple solvothermal method. The structural and rnorphological characterization of as undoped and doped samples have been made using X-ray diffraction (XRD) and FESEM imaging techniques and it reveals the formation of Ni doped ZnSe nanospheres with crystallite size 6 nm. The observed red shift in absorption edge of Ni doped ZnSe as compared to undoped sample also indicates the formation of nanospheres. The PL spectra of Ni doped sample shows red shift with enhanced intensity. The molecular vibrations of PVA capped Ni doped ZnSe nanospheres have been studied and four new vibrational modes have been observed and reported.
Tailoring morphology and optical properties of CdS nanostructures using PEG and EDTA: photocatalytic dye/drug degradation and hydrogen evolution L Baid, KS Ojha Applied Physics A 132 (5), 380 , 2026 2026
Impact of Cu Concentration on Optical Properties of CIS and CIS/ZnS Core–Shell QDs P Chandra, KS Ojha physica status solidi (a) 223 (6), e202500949 , 2026 2026
Luminescence Spectroscopic Techniques P Chandra, KS Ojha Luminescence Spectroscopy and Microscopy: Methods and Applications, 137-152 , 2026 2026
Impact of concentration and excitation wavelength on fluorescence behaviour of CuInS2 QDs P Chandra, KS Ojha Solid State Sciences 163, 107886 , 2025 2025 Citations: 2
PEG-capped ZnS nano-crystals: Structural and optical properties P Chandra, KS Ojha AIP Conference Proceedings 3198 (1), 020042 , 2025 2025
Correction to: Temperature Dependent Structural and Optical Properties of SnSe 2 Nanosheets Y Gendre, KS Ojha, C Mahapatra International Conference on Materials and Thermophysical Properties, C1-C1 , 2024 2024
Morphological and Optical Investigation of CTAB and PVP Capped ZnS Microspheres P Chandra, KS Ojha International Conference on Materials and Thermophysical Properties, 316-327 , 2024 2024
Temperature Dependent Structural and Optical Properties of SnSe 2 Nanosheets Y Gendre, KS Ojha, C Mahapatra International Conference on Materials and Thermophysical Properties, 200-213 , 2024 2024
Temporal evolution of optical and photocatalytic properties of hydrothermally synthesized EDTA-encapsulated CdS spherical nanostructures L Baid, KS Ojha Chemical Physics Impact 8, 100623 , 2024 2024 Citations: 8
Effect of CTAB and PVP on morphological and optical properties of CdS microstructures L Baid, KS Ojha Journal of Materials Science: Materials in Electronics 35 (16), 1043 , 2024 2024 Citations: 3
Optical and vibrational properties of Ni doped ZnSe nanospheres SM Saini, KS Ojha Optik 232, 166570 , 2021 2021 Citations: 12
Optical characterization of CTAB assisted Ni doped ZnS nanoparticles KS Ojha, SM Saini IOP Conference Series: Materials Science and Engineering 1120 (1), 012010 , 2021 2021
Optical and Dielectric Characterization of Pva Capped Znse Nanorods KS Ojha, AK Shrivastav Journal of Applied Spectroscopy 87 (1), 128-133 , 2020 2020
Structural and optical study of copper-doped zinc sulfide nanoparticles P Mishra, KS Ojha, A Khare Journal of Applied Spectroscopy 85 (4), 743-748 , 2018 2018 Citations: 14
Novel nanostructure of cadmium selenide synthesized by solvothermal method and their characterization KS Ojha Optik 169, 297-302 , 2018 2018 Citations: 8
Improvement of refinery maintenance and mechanical services: application of lean manufacturing principles BV Chowdary, K Ojha, A Alexander International Journal of Collaborative Enterprise 6 (1), 20-36 , 2018 2018 Citations: 17
Structural and optical properties of PVA doped zinc sulphide thin films KS Ojha Optik 127 (5), 2586-2589 , 2016 2016 Citations: 26
Structural and Dielectric Study of Zirconium Modified Bismuth Sodium Titanate Thin Film SA K. S. Ojha Materials Today: Pr 2, 4369 – 4372 , 2015 2015 Citations: 1
Structural and Dielectric Studies of MWCNT reinforced Microcellular Silicone Elastomer Nanocomposite SD Agrawal Sadhana, Ojha K. S. Materials Today:Pr 2, 4516 – 4520 , 2015 2015 Citations: 6
Structural Optimization of Bismuth Sodium Titanate Thin Films KS Ojha Ferroelectrics 474 , 2015 2015 Citations: 8
MOST CITED SCHOLAR PUBLICATIONS
Structural and optical properties of PVA doped zinc sulphide thin films KS Ojha Optik 127 (5), 2586-2589 , 2016 2016 Citations: 26
Improvement of refinery maintenance and mechanical services: application of lean manufacturing principles BV Chowdary, K Ojha, A Alexander International Journal of Collaborative Enterprise 6 (1), 20-36 , 2018 2018 Citations: 17
Structural and optical study of copper-doped zinc sulfide nanoparticles P Mishra, KS Ojha, A Khare Journal of Applied Spectroscopy 85 (4), 743-748 , 2018 2018 Citations: 14
Laser produced spectrum of Si2 molecule in the region of 540–1010 nm KS Ojha, R Gopal Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 71 (3 … , 2008 2008 Citations: 13
Optical and vibrational properties of Ni doped ZnSe nanospheres SM Saini, KS Ojha Optik 232, 166570 , 2021 2021 Citations: 12
Dielectric and impedance study of optimized cadmium sulphide thin film KS Ojha, RL Srivastava Chalcogenide Lett 10 (1), 1-10 , 2013 2013 Citations: 9
Temporal evolution of optical and photocatalytic properties of hydrothermally synthesized EDTA-encapsulated CdS spherical nanostructures L Baid, KS Ojha Chemical Physics Impact 8, 100623 , 2024 2024 Citations: 8
Novel nanostructure of cadmium selenide synthesized by solvothermal method and their characterization KS Ojha Optik 169, 297-302 , 2018 2018 Citations: 8
Structural Optimization of Bismuth Sodium Titanate Thin Films KS Ojha Ferroelectrics 474 , 2015 2015 Citations: 8
Structural and Dielectric Studies of MWCNT reinforced Microcellular Silicone Elastomer Nanocomposite SD Agrawal Sadhana, Ojha K. S. Materials Today:Pr 2, 4516 – 4520 , 2015 2015 Citations: 6
New band systems of SiC molecule in visible region KS Ojha, R Gopal Spectroscopy Letters 44 (4), 267-272 , 2011 2011 Citations: 6
Laser produced spectrum of B2+-X2+ and B2+-A2i systems of SiN molecule KS Ojha, R Gopal Indian Journal of Physics 80 (8), 819-822 , 2006 2006 Citations: 6
Laser-induced breakdown spectra of Zn 2 molecule in the violet region SC Singh, KS Ojha, R Gopal Pramana 67 (3), 519-527 , 2006 2006 Citations: 4
Effect of CTAB and PVP on morphological and optical properties of CdS microstructures L Baid, KS Ojha Journal of Materials Science: Materials in Electronics 35 (16), 1043 , 2024 2024 Citations: 3
Impact of concentration and excitation wavelength on fluorescence behaviour of CuInS2 QDs P Chandra, KS Ojha Solid State Sciences 163, 107886 , 2025 2025 Citations: 2
New band systems of SiN radical KS Ojha, R Gopal Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 109, 155-157 , 2013 2013 Citations: 2
Structural and Dielectric Study of Zirconium Modified Bismuth Sodium Titanate Thin Film SA K. S. Ojha Materials Today: Pr 2, 4369 – 4372 , 2015 2015 Citations: 1
Laser induced spectra of SiN molecule in near IR region KS Ojha, R Gopal International Journal of Spectroscopy 2013 (1), 915365 , 2013 2013 Citations: 1
Dielectric and Impedance Spectroscopic Studies on Diffuse Phase Transitions in Bismuth Sodium Titanate KS Ojha, KN Singh, PK Bajpai AIP Conference Proceedings 1372 (1), 154-164 , 2011 2011 Citations: 1
