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Applied Physics A

, 124:782 | Cite as

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

  • Puja Bhattacharyya
  • Swarupananda Bhattacharjee
  • Manoranjan Bar
  • Uttam Kumar Ghorai
  • Mrinal Pal
  • Sujoy BaitalikEmail author
  • Chandan Kr. GhoshEmail author
Article

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.

Graphical abstract

Notes

Acknowledgements

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

Supplementary material

339_2018_2174_MOESM1_ESM.docx (1006 kb)
Supplementary material 1 (DOCX 1006 KB)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Puja Bhattacharyya
    • 1
  • Swarupananda Bhattacharjee
    • 1
  • Manoranjan Bar
    • 2
  • Uttam Kumar Ghorai
    • 3
  • Mrinal Pal
    • 4
  • Sujoy Baitalik
    • 2
    Email author
  • Chandan Kr. Ghosh
    • 1
    Email author
  1. 1.School of Materials Science and NanotechnologyJadavpur UniversityKolkataIndia
  2. 2.Department of Chemistry, Inorganic SectionJadavpur UniversityKolkataIndia
  3. 3.Department of Industrial Chemistry and Swami Vivekananda Research CenterRamakrishna Mission VidyamandiraHowrahIndia
  4. 4.Sensor and Actuator DivisionCSIR-Central Glass and Ceramic Research InstituteKolkataIndia

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