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Electroluminescence, UV sensing, and pressure-induced conductance of Li+/Al3+ modified NiO: theoretical/experimental insights

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Abstract

Sol–gel prepared doped NiO have been investigated. The dopant Al3+ is smaller in size but has a higher valence state than the host cation Ni2+. Hence, it induces an oxygen-rich lattice. The latent oxygen vacancies are annihilated and oxygen interstitials are created. Al3+ is smaller in size than Ni2+, promotes a tendency to reduce the extra O-content introduced by the higher charged Al3+ substitute ions. Such complex combinations of ions may affect the electronic affinity of the host ions and thereby bring modifications in the band properties. Changes in the population density of known defect states such as oxygen and cationic vacancies and interstitials can dominate physical and electronic functionalities. Such mechanisms have been explored in this report. Application of pressure may lead to modifications in the electronic clouds, which can also modify the nature of conduction of the materials and affect the functionality of devices.

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Acknowledgments

The authors acknowledge the Department of Science and Technology (DST, Govt. of India) FIST program for providing a Horiba Raman spectrometer to the Discipline of Physics at IIT Indore, employed to gather high quality Raman spectra. They also thank the Ministry of Education and Indian Institute of Technology Indore for providing research infrastructure, especially the SIC facility. The corresponding author acknowledges the DST for research grant under the AMT project (DST/TDT/AMT/2017/200). One of the authors (PKM) would like to thank the Department of Science and Technology (DST), New Delhi, for providing the Inspire Fellowship (IF170002). EGR acknowledges the Department of Science and Technology (DST, Govt. of India) for financial support under the Women Scientist Scheme-A (SR/WOS-A/PM-99/2016 (G)).

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  1. Department of Physics, Indian Institute of Technology Indore, Indore, India

    Prashant Kumar Mishra, Sourabh Kumar, E. G. Rini, Rachit Dobhal, Mahesh Kumar & Somaditya Sen

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Mishra, P.K., Kumar, S., Rini, E.G. et al. Electroluminescence, UV sensing, and pressure-induced conductance of Li+/Al3+ modified NiO: theoretical/experimental insights. Journal of Materials Research 38, 2550–2565 (2023). https://doi.org/10.1557/s43578-023-00994-y

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