Synthesis and optical properties of zinc oxide nanoparticles grown on Sn-coated silicon substrate by thermal evaporation method

Divya Somvanshi; S. Jit

doi:10.1117/12.2010345

28 January 2013 Synthesis and optical properties of zinc oxide nanoparticles grown on Sn-coated silicon substrate by thermal evaporation method

Divya Somvanshi, S. Jit

Author Affiliations +

Proceedings Volume 8760, International Conference on Communication and Electronics System Design; 87600G (2013) https://doi.org/10.1117/12.2010345
Event: International Conference on Communication and Electronics System Design, 2013, Jaipur, India

Abstract

The Zinc oxide (ZnO) nanoparticles have been grown on n type silicon substrate using tin (Sn) metal as seed layer by a low cost thermal evaporation method. SEM images show that the ZnO nanoparticles have been uniformely grown on the whole substrate surface relatively perpendicular to the substrate. The Photoluminescence (PL) spectrum consists of strong UV emission at wavelength of 355 nm along with a broad near band edge (NBE) emission covering a wide range of wavelength from 370 to 550 nm. This broadening region exhibits blue, violet and green emission due to the presence of native defects such as zinc interstitial (Zn_i), oxygen vacancy (V_O) and oxygen interstitial (O_i) in the band gap of ZnO. Raman spectroscopy shows the existence of E₂ mode at 437 cm^-1 which confirms the pure wurtzite hexagonal phase of ZnO. The optical and structural properties of ZnO nanoparticles could be explored for blue-violet light emitting diodes (LEDs) and gas sensing applications.

Citation Download Citation

Divya Somvanshi and S. Jit "Synthesis and optical properties of zinc oxide nanoparticles grown on Sn-coated silicon substrate by thermal evaporation method", Proc. SPIE 8760, International Conference on Communication and Electronics System Design, 87600G (28 January 2013); https://doi.org/10.1117/12.2010345

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