Artificial light is essential in information technologies such as optical telecommunications, data storage, security features, and information display. In this paper, researchers present a chiral lanthanide lumino-glass with extra-large circularly polarized light (luminescence) (CPL) for advanced photonic security device applications.
A europium complex with the chiral (+)-3-(trifluoroacetyl) camphor ligand and the achiral glass promoter tris (2,6-dimethoxyphenyl) phosphine oxide ligand is used to make the chiral lanthanide glass. Differential scanning calorimetry is used to characterize the glass phase transition behavior of the Eu (III) complex.
The transparent amorphous glass exhibits circularly polarized light CPL with a large dissymmetry factor of gCPL = 1.2. At a Eu (III) concentration of 1 mM, the lumino-glass has a thousand times the brightness of Eu (III) luminophores embedded in polymer films of the same thickness. It is shown how to use chiral lanthanide lumino-glass in an advanced security paint.
Artificial light is essential in information technologies such as optical telecommunications, data storage, security features, and information display. Organic-based luminophores with precise information control have been extensively researched to develop light-based information technologies. The molecular quantum design of organic luminophores is responsible for this precise control. Combining molecules with quantum design and flexible amorphous materials will advance photoscience and technology for industrial applications such as flexible organic light-emitting diodes (OLEDs).
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