Enhanced blue light emission in transparent ZnO:PVA nanocomposite free standing polymer films

B. Karthikeyan, T. Pandiyarajan, R. V. Mangalaraja

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

ZnO:PVA nanocomposite films were prepared and their fluorescence and time resolved photoluminescence properties were discussed. X-ray diffraction and infrared spectroscopy results confirmed the ZnO:PVA interaction. Optical absorption spectra showed two bands at 280 and 367 nm which were ascribed to PVA and excitonic absorption band, respectively. Fluorescence spectra showed that the blue emission of ZnO was enhanced about tenfold through chemical interface electron transfer. The electron transfer from ZnO to PVA and its decay dynamics were experimentally analyzed through time resolved fluorescence measurements. The study revealed that the excited electrons found pathway through PVA to ground state which was slower than the pure ZnO nanoparticles.

Original languageEnglish
Pages (from-to)485-490
Number of pages6
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume152
DOIs
StatePublished - 19 Aug 2016
Externally publishedYes

Keywords

  • Blue emission
  • Time resolved fluorescence
  • ZnO:PVA composite

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