Jump to main content
Jump to site search

Issue 28, 2018
Previous Article Next Article

Electrically enhancing and modulating the photoluminescence of upconversion nanoparticles using liquid crystals

Author affiliations

Abstract

The use of an external electric field to enhance and modulate the photoluminescence (PL) of lanthanide-doped upconversion nanoparticles (UCNPs) is challenging. A liquid crystal (LC)-based approach is demonstrated in this study. By loading UCNPs in a polymer-stabilized, homogeneous LC matrix, the upconversion PL intensity can increase or decrease almost linearly upon increase or decrease, respectively, of the applied voltage, reaching an enhancement factor of about 6–8 at an electric field of 4.6 V μm−1 depending on the 980 nm excitation laser power and the applied a.c. field frequency. The origin of the electrical enhancement and modulation is the electric field induced LC texture (orientation state) transition that controls the light scattering of the LC/UCNP mixture. Increased scattering of the near infrared (NIR) excitation light before exciting the material increases its probability to be absorbed by the UCNPs and thus leads to enhanced PL emission. This LC scattering-based approach is facile, versatile and can readily be applied to UCNPs with no need for chemical composition or structural modifications that often require tedious synthesis.

Graphical abstract: Electrically enhancing and modulating the photoluminescence of upconversion nanoparticles using liquid crystals

Back to tab navigation

Publication details

The article was received on 01 May 2018, accepted on 29 Jun 2018 and first published on 29 Jun 2018


Article type: Paper
DOI: 10.1039/C8TC02105H
Citation: J. Mater. Chem. C, 2018,6, 7683-7688
  •   Request permissions

    Electrically enhancing and modulating the photoluminescence of upconversion nanoparticles using liquid crystals

    X. Tong, J. Xiang, X. Lu, P. Karsenti and Y. Zhao, J. Mater. Chem. C, 2018, 6, 7683
    DOI: 10.1039/C8TC02105H

Search articles by author

Spotlight

Advertisements