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Article Dans Une Revue ACS Applied Optical Materials Année : 2023

Efficient Dispersion of Organic Fluorophores by Size Matching with a Difunctionalized Spacer Interleaved into Layered Double Hydroxide

Résumé

Strongly luminescent when diluted in aqueous solution, Sulforhodamine B (SRB) is an organic dye suffering from aggregation-caused quenching in its solid state. Its cointercalation in very small quantities (0.12 mol %) in a layered double hydroxide (LDH) matrix with phenylenedipropionate (PPA) anions, a difunctionalized spacer matching its size, is found to be highly effective, with more than 99% of the SRB molecules taken up. The resulting hybrid material enables luminescence, with an absolute photoluminescence quantum yield (PLQYabs) reaching 39% under UV excitation and even reaching 60% at its maximum. The dispersion of the LDH dye powder in silicone results in homogeneous composite films with loading as high as 40 wt % useable as a masterbatch. The optical properties are found to remain after thermal treatment up to 120 °C, with a decrease in PLQYabs of only 5%, making it a good candidate for the development of rare-earth-free phosphors.
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hal-04448324 , version 1 (31-05-2024)

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Guillaume Zerbib, Damien Boyer, Geneviève Chadeyron, François Réveret, Fabrice Leroux. Efficient Dispersion of Organic Fluorophores by Size Matching with a Difunctionalized Spacer Interleaved into Layered Double Hydroxide. ACS Applied Optical Materials, 2023, 1 (9), pp.1535-1545. ⟨10.1021/acsaom.3c00173⟩. ⟨hal-04448324⟩
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