Inkjet‐Printed Multicolor Arrays of Highly Luminescent Nanocrystal‐Based Nanocomposites

Abstract

Inkjet technology is a compelling method for the flexible and cost-effective printing of functional inks. We show that nanocomposite solutions based on polystyrene and differently sized core/shell-type nanocrystals (NCs) formed by a CdSe core coated with a shell of ZnS (CdSe@ZnS) in a single solvent, chloroform, can be reliably dispensed into luminescent, multicolor pixel arrays. This study demonstrates the relevance of parameters like polymer concentration and nozzle diameter, highlighting how the optimal conditions to print NCs embedded in 5 wt% polystyrene nanocomposite are given by a 70-mmdiameter nozzle. The obtained structures show that the bright size-dependent emission of the NCs in the nanocomposite is retained in the printed pixels.

Nanopartikuläre Funktionsmaterialien

“…B. Poly(phenylenvinylen), PPV) eingebettet, können flächige und vollständig transparente Leuchtdioden aufgebaut werden. [137] Neben Solarzellen finden NPs in Lithiumionenbatterien, [138] Brennstoffzellen und Superkondensatoren ("super caps") [139] Verwendung [143] Dabei ist die Lebensdauer derzeit durch Sintereffekte der NPs begrenzt. Sowohl bei Lithiumionenbatterien als auch bei Brennstoffzellen befinden sich Nanomaterialien aktuell im Stadium von Forschung und Entwicklung.…”

The influence of gravity on the distribution of the deposit formed onto a substrate by sessile, hanging, and sandwiched hanging drop evaporation

“…In particular, it is the process of evaporative contact line formation (the so-called coffee-ring effect) [5][6][7][8][9], and its applications (e.g. the self-assembly of long-range ordered nanocrystal superlattice monolayers) [10][11][12][13][14] that constitutes the main focus of the present article.…”

“…sessile evaporation from a single substrate (Fig. 1a) [5][6][7][8][9][10][11][12][13][14], evaporation from 2-substrate configurations (Fig. 1b and c) [15][16][17] and evaporation in a hanging drop configuration (Fig.…”

Direct Patterning of Colloidal Quantum-Dot Thin Films for Enhanced and Spectrally Selective Out-Coupling of Emission

“…25 However, while such techniques have yielded patterned cQD films for electronic applications 25 photonic structuring has not yet been reported. Finally, alternative strategies for printing, 26 patterning, 27 and soft-lithography 28,29 have been developed using matrix-embedded cQD films, though the use of such composite films has the distinct disadvantage of diluted emitter concentration, which inevitably places limitations on the emission intensity.…”