Ni-doped CdTe nanostructures for photo response and nonlinear optical applications
5 affiliations
- 1Department of Engineering and Materials Physics, Institute of Chemical Technology Indian Oil Odisha Campus Bhubaneswar 751013 India
- 2Department of Applied Physics, Fakir Mohan University Balasore 756019 India
- 3Department of Physics, SRM Valliammai Engineering College (Autonomous) SRM Nagar, Kattankulathur 603203 India
- 4Department of Physics, Vel Tech Rangarajan Dr Sagunthala R&D Institute of Science and Technology Chennai 600062 India
- 5Department of Physics, Dayananda Sagar Academy of Technology and Management Udayapura Bangalore 560082 India
Abstract
Ni-doped CdTe nanostructures were successfully synthesized via a facile hydrothermal route, demonstrating the critical role of transition-metal doping in tailoring the functional properties of CdTe-based nanomaterials. Structural analysis using X-ray diffraction (XRD) confirmed the formation of a cubic CdTe phase, with a noticeable reduction in crystallite size from ∼28 to ∼24 nm upon Ni incorporation, indicating lattice modification and enhanced defect density. Field-emission scanning electron microscopy (FESEM) analysis revealed a predominantly nanoparticle-like morphology, suggesting uniform nucleation and growth during the hydrothermal process. X-ray photoelectron spectroscopy (XPS) further elucidated the elemental composition and oxidation states, confirming the successful incorporation of Ni into the CdTe lattice. Optical studies revealed a systematic blue shift in the band gap from 1.84 to 2.23 eV with increasing Ni concentration, accompanied by a decrease in refractive index from 2.95 to 2.55, suggesting tuneable optical dispersion characteristics. Photoconductivity measurements demonstrated a pronounced enhancement in photocurrent under illumination relative to dark conditions, with a maximum photocurrent of 94.05 mA and a detectivity on the order of 106 Jones, indicating good photo response performance. Furthermore, nonlinear optical (NLO) investigations using the Z-scan technique revealed reverse saturable absorption (RSA) behaviour across all samples, as evidenced by positive nonlinear absorption coefficients. These findings collectively establish that Ni-doped CdTe nanostructures possess significant potential for next-generation optoelectronic applications, particularly in good-performance photodetectors and nonlinear optical devices.
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BibTeX
@article{supriya2026nidoped,
title = {{Ni-doped CdTe nanostructures for photo response and nonlinear optical applications}},
author = {Swikruti Supriya and Lipika Naik and Gobalakrishnan S. and Jayaprakash K. and Chinnaiyah Sripan and Ramakanta Naik},
journal = {RSC advances},
year = {2026},
month = oct,
doi = {10.1039/d6ra07010h},
url = {https://europepmc.org/article/PMC/PMC13656020},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - Ni-doped CdTe nanostructures for photo response and nonlinear optical applications
AU - Swikruti Supriya
AU - Lipika Naik
AU - Gobalakrishnan S.
AU - Jayaprakash K.
AU - Chinnaiyah Sripan
AU - Ramakanta Naik
PY - 2026
DA - 2026/10/12
JO - RSC advances
DO - 10.1039/d6ra07010h
UR - https://europepmc.org/article/PMC/PMC13656020
AB - Ni-doped CdTe nanostructures were successfully synthesized via a facile hydrothermal route, demonstrating the critical role of transition-metal doping in tailoring the functional properties of CdTe-based nanomaterials. Structural analysis using X-ray diffraction (XRD) confirmed the formation of a cubic CdTe phase, with a noticeable reduction in crystallite size from ∼28 to ∼24 nm upon Ni incorporation, indicating lattice modification and enhanced defect density. Field-emission scanning electron microscopy (FESEM) analysis revealed a predominantly nanoparticle-like morphology, suggesting uniform nucleation and growth during the hydrothermal process. X-ray photoelectron spectroscopy (XPS) further elucidated the elemental composition and oxidation states, confirming the successful incorporation of Ni into the CdTe lattice. Optical studies revealed a systematic blue shift in the band gap from 1.84 to 2.23 eV with increasing Ni concentration, accompanied by a decrease in refractive index from 2.95 to 2.55, suggesting tuneable optical dispersion characteristics. Photoconductivity measurements demonstrated a pronounced enhancement in photocurrent under illumination relative to dark conditions, with a maximum photocurrent of 94.05 mA and a detectivity on the order of 106 Jones, indicating good photo response performance. Furthermore, nonlinear optical (NLO) investigations using the Z-scan technique revealed reverse saturable absorption (RSA) behaviour across all samples, as evidenced by positive nonlinear absorption coefficients. These findings collectively establish that Ni-doped CdTe nanostructures possess significant potential for next-generation optoelectronic applications, particularly in good-performance photodetectors and nonlinear optical devices.
SN - 2046-2069
ER -