Effect of using ink containing polyacrylate and silicone surfactant on the inkjet printing of quantum dot films

Abstract

For device printing, it is important for uniform films to be printed because the morphology of the film affects the performance of the device in inkjet printing. In this study, to prepare stable and well-dispersed ink, polyacrylate and silicone surfactant BD-3033H were added to ink. Then a uniform quantum dot (QD) film was obtained by optimizing the polyacrylate and silicone surfactant contents of the ink as well as the substrate temperature. The change of the polyacrylate structure from a curly chain structure to a three-dimensional network structure blocked the outward flow of QDs. Silicone surfactant BD-3033H caused Marangoni flow and made the QDs flow inward. When the substrate temperature was increased, the solvent evaporation rate was accelerated, the contact line was pinned, and the outward flow was enhanced, which changed the film structure from convex to flat. Finally, when the polyacrylate content was 12 wt%, the silicone surfactant BD-3033H content was 0.10 wt%, the substrate temperature was 40°C, and the coffee ring effect was eliminated. A uniform QD film was printed, providing a technical guarantee for the fabrication of QD devices in the future.

Effect of Particle Concentration on Surfactant-Induced Alteration of the Contact Line Deposition in Evaporating Sessile Droplets

“…It was seen that, for all particle concentrations, the amount of surfactant addition for suppressing the CRE has no major effect on the total time of evaporation. This shows the exquisite advantage of this method, and its superiority over other proposed methods such as increasing the viscosity 12,18 of the droplet or gelation, 32 which will significantly increase the total time of evaporation. Besides, as mentioned previously, how particle concentration affects the pinning/depinning behavior of the droplet has not yet been quantitatively explained, which can be a potential area for future studies.…”

“…Using three different commercial surfaces with and without anionic SDS surfactants, Akashi et al 36 were able to change the self-assembly pattern formation of ZnO nanofluids (alongside its wettability and rheological properties) with different surfactant concentrations. Lin et al 12 also reached the most homogeneous deposits of inkjet printing droplets by optimizing the surfactant concentration, polyacrylate content (for increasing the viscosity of the droplet), and the substrate temperature.…”

Challenges, Prospects, and Emerging Applications of Inkjet‐Printed Electronics: A Chemist's Point of View

“…( 6)], the apparent contact angle θ w differs from the angle of equilibrium. cosq W ¼ rcosq Eq (6) The factor r is the ratio of the real to the projected area covered by the drop. If r is greater than unity, the roughness amplifies the hydrophobic character of the surface.…”

Smart polymers and nanocomposites for 3D and 4D printing

“…Perovskite materials being endowed with a large absorption coefficient and a direct band gap are also known as highly efficient PV absorbers [280], [281]. Lower-efficiency materials such as polymer organic materials [282] and quantum dots materials [283]are other materials that can be used in PV solar devices.…”