Applied Physics A

, 124:277 | Cite as

CdTe quantum-dot-modified ZnO nanowire heterostructure

  • Kanchana Shahi
  • R. S. Singh
  • Ajaya Kumar Singh
  • Mariya Aleksandrova
  • Rabah Khenata
Article
  • 102 Downloads

Abstract

The effect of CdTe quantum-dot (QD) decoration on the photoluminescence (PL) behaviour of ZnO nanowire (NW) array is presented in the present work. Highly crystalline and vertically 40–50 nm diameter range and 1 µm in length aligned ZnO NWs are synthesized using low-cost method. The crystallinity and morphology of the NWs are studied by scanning electron microscopy and X-ray powder diffraction methods.Optical properties of the nanowires are studied using photo-response and PL spectroscopy. CdTe QDs are successfully synthesized on ZnO nanowire surface by dip-coating method. ZnO NWs are sensitized with CdTe QDs characterized by transmission electron microscopy, energy-dispersive X-ray spectroscopy, and PL spectroscopy. The highly quenched PL intensity indicates the charge transfer at interface between CdTe QDs and ZnO NWs and is due to the formation of type-II heterostructure between QDs and NWs. Photo-response behaviour of heterostructure of the film is also been incorporated in the present work.

Notes

Acknowledgements

A portion of this research was performed using facilities at CeNSE, funded by Ministry of Electronics and Information Technology (MeitY), Govt. of India, and located at the Indian Institute of Science, Bengaluru.

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Copyright information

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

Authors and Affiliations

  • Kanchana Shahi
    • 1
  • R. S. Singh
    • 2
  • Ajaya Kumar Singh
    • 3
  • Mariya Aleksandrova
    • 4
  • Rabah Khenata
    • 5
  1. 1.Department of PhysicsGovt. V Y T P G Autonomous CollegeDurgIndia
  2. 2.Department of PhysicsGovt. L.C.S. Mahavidyalaya ChowkiRajnandgaonIndia
  3. 3.Department of ChemistryGovt. V Y T P G Autonomous CollegeDurgIndia
  4. 4.Department of MicroelectronicsTechnical University of SofiaSofiaBulgaria
  5. 5.Faculty of Sciences and TechnologyMascara UniversityMascaraAlgeria

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