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Inkjet Printing of Luminescent CdTe Nanocrystal–Polymer Composites |
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| Authors: | E Tekin P?J Smith S Hoeppener A?M?J van?den?Berg A?S Susha A?L Rogach J Feldmann U?S Schubert |
| Affiliation: | 1. Laboratory of Macromolecular Chemistry and Nanoscience, Eindhoven University of Technology (TU/e), P.O. Box 513, 5600 MB Eindhoven, The Netherlands;2. Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands;3. Photonics and Optoelectronic Group, Physics Department & Center for Nanoscience (CeNS), Ludwig‐Maximilians‐Universit?t München, Amalienstr. 54, 80799 Munich, Germany |
| Abstract: | Inkjet printing is used to produce well‐defined patterns of dots (with diameters of ca. 120 μm) that are composed of luminescent CdTe nanocrystals (NCs) embedded within a poly(vinylalcohol) (PVA) matrix. Addition of ethylene glycol (1–2 vol %) to the aqueous solution of CdTe NCs suppresses the well‐known ring‐formation effect in inkjet printing leading to exceptionally uniform dots. Atomic force microscopy characterization reveals that in the CdTe NC films the particle–particle interaction could be prevented using inert PVA as a matrix. Combinatorial libraries of CdTe NC–PVA composites with variable NC sizes and polymer/NC ratios are prepared using inkjet printing. These libraries are subsequently characterized using a UV/fluorescence plate reader to determine their luminescent properties. Energy transfer from green‐light‐emitting to red‐light‐emitting CdTe NCs in the composite containing green‐ (2.6 nm diameter) and red‐emitting (3.5 nm diameter) NCs are demonstrated. |
| Keywords: | Inkjet printing Luminescence Nanocomposites Nanocrystalline materials |