Inkjet printing technology is an emerging deposition method for the flexible and cost-effective dispensing of functional materials. In this work, luminescent single- and multi-colour pixel arrays of chloroform nanocomposite inks based on polystyrene (PS) functionalized with highly luminescent colloidal CdS and differently sized CdSe@ZnS nanocrystals (NCs) were printed in drop-on-demand mode. The solubility of the organic-capped NCs in organic solvents allowed the employment of chloroform for preparing highly processable luminescent nanocomposite inks. We demonstrated that nanocomposite inks in a single apolar carrier medium, can be reliably dispensed once optimized the ejection parameters, with no need of multi-solvent mixtures or post preparative processing. The bright and non-bleachable sizedependent luminescence of the NCs is conveyed to the printed pixels which present a luminescence ranging from blue to red and a regular and reproducible shape.
Jakob Heier, René Uwe Schneider, Sina Abdolhosseinzadeh, Mohammad Jafarpour
Danick Briand, Nicolas Francis Fumeaux
Yves Perriard, Yoan René Cyrille Civet, Thomas Guillaume Martinez, Stefania Maria Aliki Konstantinidi, Armando Matthieu Walter, Simon Holzer