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Studies on NiO-PVA Composite Films for Opto-Electronics and Optical Limiters

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Details

Original languageEnglish
Pages (from-to)1539-1542
Number of pages4
JournalIEEE Photonics Technology Letters
Volume30
Issue number17
DOIs
Publication statusPublished - 1 Sep 2018
Publication typeA1 Journal article-refereed

Abstract

We report optical, excited-state lifetime, and nonlinear optical (NLO) properties of nickel oxide (NiO)/poly vinylalcohol (PVA) polymer free-standing films for opto-electronics and optical limiting applications. Optical absorption studies of NiO-loaded PVA films show that the exciton peaks are centered at 330 nm. Fluorescence studies reveal that the emission is due to exciton recombination and defects in NiO. Time-resolved fluorescence studies show that the recombination in PVA happens through NiO, where NiO has a faster decay time than the pure PVA. NLO measurements carried out using a 532 nm, 10-ns Nd: YAG laser, show that for a given energy, NiO/PVA shows good optical limiting, and the obtained NLO behavior is due to effective two-photon absorption.

Keywords

  • excitons, filled polymers, fluorescence, nickel compounds, optical limiters, semiconductor materials, thin films, time resolved spectra, exciton recombination, excited-state lifetime, nonlinear optical properties, optoelectronics, optical absorption, time-resolved fluorescence, nickel oxide-poly vinylalcohol polymer composite thin films, two-photon absorption, NiO, Nonlinear optics, Optical films, Optical sensors, Absorption, Optical polymers, Optical imaging, Optical power limiting, polymer nanocomposite, excitons in NiO, effective two photon absorption

Publication forum classification

Field of science, Statistics Finland