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Hedgehog ZnO/Ag heterostructure: an environment-friendly rare earth free potential material for cold-white light emission with high quantum yield

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Abstract

Abstract

Solid-state white light emission from environment-friendly, highly stable hedgehog ZnO/Ag heterostructure has been observed for first time from a combined effect of tunability of emission centers and charge transfer. The heterostructure has been synthesized via a facile low-temperature hydrothermal route and characterized using X-ray diffractometer, scanning electron microscope and transmission electron microscope. The interaction between ZnO and Ag can be confirmed from the appearance of few new multi-phonon Raman peaks. Steady-state photoluminescence spectrum reveals multiple emissions (413, 453, 546, 605 and 667 nm) from virgin hedgehog ZnO at an excitation wavelength of 325 nm. Tuneability of radiative and non-radiative emission of ZnO which is the primary mechanism for white light emission (CIE coordinate: 0.35, 0.32) has been briefly investigated by time-correlated single-photon spectroscopy. Biocompatible as well cost-effectivity depicts that the as-prepared heterostructure would be a promising solid-state white light-emitting phosphor material for long-term use.

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Acknowledgements

One of the authors (PB) wants to thank UPE-II for financial support during execution of the work.

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Authors and Affiliations

  1. School of Materials Science and Nanotechnology, Jadavpur University, Jadavpur, Kolkata, 700032, India

    Puja Bhattacharyya, Swarupananda Bhattacharjee & Chandan Kr. Ghosh

  2. Department of Chemistry, Inorganic Section, Jadavpur University, Kolkata, 700032, India

    Manoranjan Bar & Sujoy Baitalik

  3. Department of Industrial Chemistry and Swami Vivekananda Research Center, Ramakrishna Mission Vidyamandira, Belur Math, Howrah, 711202, India

    Uttam Kumar Ghorai

  4. Sensor and Actuator Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata, 700032, India

    Mrinal Pal

Authors
  1. Puja Bhattacharyya
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  2. Swarupananda Bhattacharjee
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  3. Manoranjan Bar
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  4. Uttam Kumar Ghorai
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Correspondence to Sujoy Baitalik or Chandan Kr. Ghosh.

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Bhattacharyya, P., Bhattacharjee, S., Bar, M. et al. Hedgehog ZnO/Ag heterostructure: an environment-friendly rare earth free potential material for cold-white light emission with high quantum yield. Appl. Phys. A 124, 782 (2018). https://doi.org/10.1007/s00339-018-2174-4

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  • DOI: https://doi.org/10.1007/s00339-018-2174-4

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