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Scalable Lanthanum Titanate (La2Ti2O7) nanostructures as UV photodetectors

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Abstract

Thermally and chemically stable perovskite-like layer structures have attracted extensively in the field of energy and environmental applications. In this study, La2Ti2O7 was synthesized by the solvothermal method at 180 °C. This method provides high pure and homogeneously dispersed nanorods of orthorhombic phase having length of 250 nm and width of 70 nm. Even though this is a low-temperature synthesis method, it yields high crystalline nature after calcination. The novelty of this work is its synthesis methodology by the solvothermal route to achieve lower weight loss of La2Ti2O7. Furthermore, they exhibit narrow absorption in the UV-region from 200 to 350 nm, makes it possible to fabricate it as UV photodetector at ambient condition. In presence of UV illumination at 390 nm, it shows sharp photocurrent response with the decay time of 1.7 s.

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Acknowledgements

One of the authors D. Durgalakshmi gratefully acknowledges DST-INSPIRE Faculty Fellowship under the sanction DST/INSPIRE/04/2016/000845 for their funding.

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Authors and Affiliations

  1. Department of Medical Physics, CEG Campus, Anna University, Chennai, 600 025, India

    Josfel Flora John, Durgalakshmi Dhinasekaran & Mohanraj Jagannathan

  2. Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603 203, India

    Ajay Rakkesh Rajendran

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  1. Josfel Flora John
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  2. Durgalakshmi Dhinasekaran
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  4. Ajay Rakkesh Rajendran
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Correspondence to Durgalakshmi Dhinasekaran.

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John, J.F., Dhinasekaran, D., Jagannathan, M. et al. Scalable Lanthanum Titanate (La2Ti2O7) nanostructures as UV photodetectors. J Mater Sci: Mater Electron 33, 9126–9133 (2022). https://doi.org/10.1007/s10854-021-07145-1

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