Jump to main content
Jump to site search

Issue 33, 2016
Previous Article Next Article

White light emission and temperature dependent chromaticity shifts by modification of luminescent ZrO(FMN) nanoparticles with rare earth halides

Author affiliations

Abstract

The photoluminescence of the dispersions of zirconyl flavinmononucleotide nanoparticles (ZrO[FMN]: FMN = flavinmononucleotide) in pyridine was deliberately influenced by the addition of rare earth halides LnCl3, resulting in a modification to core/shell structures with the nanoparticle as the core. The particle dispersion's original intense green luminescence of the flavin chromophore can therefore be shifted in chromaticity from green via white to blue. The shift depends on the reaction conditions as well as on the rare earth halide. Heating of the systems during the modification initiates these chromaticity shifts and they remain even after cooling to room temperature. For Ln = Y, La and Ho, all three halides can be used to create a broad band white light emission with a high general colour rendering index (CRI) of 84–88. The colour shift starts at 180 °C for Y and La, whereas HoCl3 addition already approaches the white point at 200 °C, whereas unmodified dispersions of ZrO(FMN) do not show a chromaticity shift at this temperature. The La-modified dispersion requires 250 °C to emit white light. The luminescence of the modified nanoparticles is also temperature dependent upon cooling to low temperatures, which shifts the colour point to intense blue for Y and La at −196 °C. Determination of the photoluminescence lifetimes indicates the modification of the chromophore and no solvent participation.

Graphical abstract: White light emission and temperature dependent chromaticity shifts by modification of luminescent ZrO(FMN) nanoparticles with rare earth halides

Back to tab navigation

Supplementary files

Publication details

The article was received on 10 May 2016, accepted on 19 Jul 2016 and first published on 19 Jul 2016


Article type: Paper
DOI: 10.1039/C6TC01920J
Citation: J. Mater. Chem. C, 2016,4, 7735-7743
  •   Request permissions

    White light emission and temperature dependent chromaticity shifts by modification of luminescent ZrO(FMN) nanoparticles with rare earth halides

    T. Wehner, J. Heck, C. Feldmann and K. Müller-Buschbaum, J. Mater. Chem. C, 2016, 4, 7735
    DOI: 10.1039/C6TC01920J

Search articles by author

Spotlight

Advertisements