A novel approach for tailoring structural, morphological, photoluminescence and nonlinear optical features in spray coated Cu:ZnO nanostructures

Via e-beam

Albin Antony, P. Poornesh, I. V. Kityk, K. Ozga, Ganesh Sanjeev, Vikash Chandra Petwal, Vijay Pal Verma, Jishnu Dwivedi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In this article, we present the investigations on modification of structural, morphological, and optical properties of spray coated Cu doped ZnO (CZO) thin films by electron beam. Glancing angle X-ray diffraction reveal polycrystalline nature of the CZO films and indexed to hexagonal wurtzite structure. Notable reduction in FWHM values upon e-beam treatment is attributed to the irradiation induced reorientation of grains. The Gaussian deconvolution at ambient temperature photoluminescence (RTPL) spectra demonstrates broad visible bands for all the spectra which is caused by presence of various structural and native defects like oxygen, zinc, zinc interstitials and antisite oxygen defects. The increase of the electron beam dosage from 0 kGy to 20 kGy results in the decrement of the PL intensity endorsing the fact that e-beam irradiation can act as a luminescent activators which can effectively regulates the luminescence behavior of CZO thin films. The Raman spectra of CZO show a successive reduction in the intensity of Raman peaks especially for the dominant peak around ∼439 cm-1 upon e-beam treatment. Increase in localized defect states results in decreasing energy band gap magnitudes for the nanostructures. The third order nonlinear optical properties of the films have been studied using Z-scan and laser stimulated third harmonic generation technique (LITHG). Enhancement of third harmonic frequency conversion efficiency of CZO nanostructures is caused by electron beam induced photoexcitation and relaxation processes. The transition properties of saturable absorption (SA) and reverse saturable absorption (RSA) mechanism upon e-beam irradiation for the CZO films can be used for production of optical limiters, all-optical logic gates, optical triggers, mode storage and fast optical switchers etc.

Original languageEnglish
Pages (from-to)6502-6518
Number of pages17
JournalCrystEngComm
Volume20
Issue number41
DOIs
Publication statusPublished - 01-01-2018

Fingerprint

sprayers
Electron beams
Nanostructures
Photoluminescence
Irradiation
photoluminescence
Defects
Zinc
electron beams
Optical properties
Oxygen
irradiation
Thin films
defects
Logic gates
Photoexcitation
zinc
Limiters
Relaxation processes
Deconvolution

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Antony, Albin ; Poornesh, P. ; Kityk, I. V. ; Ozga, K. ; Sanjeev, Ganesh ; Petwal, Vikash Chandra ; Verma, Vijay Pal ; Dwivedi, Jishnu. / A novel approach for tailoring structural, morphological, photoluminescence and nonlinear optical features in spray coated Cu:ZnO nanostructures : Via e-beam. In: CrystEngComm. 2018 ; Vol. 20, No. 41. pp. 6502-6518.
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A novel approach for tailoring structural, morphological, photoluminescence and nonlinear optical features in spray coated Cu:ZnO nanostructures : Via e-beam. / Antony, Albin; Poornesh, P.; Kityk, I. V.; Ozga, K.; Sanjeev, Ganesh; Petwal, Vikash Chandra; Verma, Vijay Pal; Dwivedi, Jishnu.

In: CrystEngComm, Vol. 20, No. 41, 01.01.2018, p. 6502-6518.

Research output: Contribution to journalArticle

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T1 - A novel approach for tailoring structural, morphological, photoluminescence and nonlinear optical features in spray coated Cu:ZnO nanostructures

T2 - Via e-beam

AU - Antony, Albin

AU - Poornesh, P.

AU - Kityk, I. V.

AU - Ozga, K.

AU - Sanjeev, Ganesh

AU - Petwal, Vikash Chandra

AU - Verma, Vijay Pal

AU - Dwivedi, Jishnu

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N2 - In this article, we present the investigations on modification of structural, morphological, and optical properties of spray coated Cu doped ZnO (CZO) thin films by electron beam. Glancing angle X-ray diffraction reveal polycrystalline nature of the CZO films and indexed to hexagonal wurtzite structure. Notable reduction in FWHM values upon e-beam treatment is attributed to the irradiation induced reorientation of grains. The Gaussian deconvolution at ambient temperature photoluminescence (RTPL) spectra demonstrates broad visible bands for all the spectra which is caused by presence of various structural and native defects like oxygen, zinc, zinc interstitials and antisite oxygen defects. The increase of the electron beam dosage from 0 kGy to 20 kGy results in the decrement of the PL intensity endorsing the fact that e-beam irradiation can act as a luminescent activators which can effectively regulates the luminescence behavior of CZO thin films. The Raman spectra of CZO show a successive reduction in the intensity of Raman peaks especially for the dominant peak around ∼439 cm-1 upon e-beam treatment. Increase in localized defect states results in decreasing energy band gap magnitudes for the nanostructures. The third order nonlinear optical properties of the films have been studied using Z-scan and laser stimulated third harmonic generation technique (LITHG). Enhancement of third harmonic frequency conversion efficiency of CZO nanostructures is caused by electron beam induced photoexcitation and relaxation processes. The transition properties of saturable absorption (SA) and reverse saturable absorption (RSA) mechanism upon e-beam irradiation for the CZO films can be used for production of optical limiters, all-optical logic gates, optical triggers, mode storage and fast optical switchers etc.

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