Fluorescent, ligand capped core-shell quantum dots (SMQDs) were embedded in diluted PMMA at low concentrations. The formulations were spin-coated on silicon and glass wafers to obtain films with thicknesses under 1 μm and low variations on a 100 mm wafer. Fluorescence properties of the SMQD were preserved in the matrix material, and agglomerations were not detectable in the fluorescence response nor in SEM images. Gradual degradation of the fluorescence response due to film aging was managed through robust packaging solutions.
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Martina Brülisauer, Emine Çağin, Dietmar Bertsch, Stefan Lüthi, Klaus Dietrich, Peter Heeb, Ulrich Stärker, André Bernard, "Homogeneous fluorescent thin films as long-term stable microscopy reference layers," Proc. SPIE 10248, Nanotechnology VIII, 102480P (30 May 2017);