Organic Nanoparticles: Preparation, Self-Assembly, and Properties

Abstract

The strong tendency of organic nanoparticles to rapidly self‐assemble into highly aligned superlattices at room temperature when solution‐cast from dispersions or spray‐coated directly onto various substrates is described. The nanoparticle dispersions are stable for years. The novel precipitation process used is believed to result in molecular distances and alignments in the nanoparticles that are not normally possible. Functional organic light‐emitting diodes (OLEDs)—which have the same host–dopant emissive‐material composition—with process‐tunable electroluminescence have been built with these nanoparticles, indicating the presence of novel nanostructures. For example, only changing the conditions of the precipitation process changes the OLED emission from green light to yellow.

A method to form semiconductor quantum dot (QD) thin films by igniting a flame at air–liquid interface: CdS and WO3

“…The use of flame synthesis for organic nanomaterial formation would be unacceptable due to their low stability at medium or higher temperature and this becomes a major drawback in the view of more and more applications of organic nanoparticles in organic light emitting diodes (OLED) [35].…”

Organic Semiconductor Nanoparticle Film: Preparation and Application

“…Also, surfactants such as the ammoniumexchanged Fluorolink 7004 (Cl(CF 2 CF(CF 3 )O) n CF 2 COO-NH 4 + ) need to be introduced into the supercritical solution to adjust the size of ultimate nanoparticles. 51 …”

“…CO 2 ) which contains dissolved organic semiconductors. 51 By using an apparatus illustrated in Figure 5, organic semiconductors dispersed in supercritical CO 2 solution can be sprayed on the substrate through a long stainless steel capillary tube attached to the chamber. After the rapid evaporation of CO 2 , OSNs are precipitated on the surface of substrates.…”

Fluorene-based macromolecular nanostructures and nanomaterials for organic (opto)electronics

“…Solution-processed nanoparticles with low viscosity are amenable to being printed into devices through low-cost and high-throughput inkjet or roll-to-roll printing techniques [78,81]. Jagannathan et al [223] demonstrated that organic nanoparticles are suitable for low-cost printing procedures. Particularly, aqueous-based nanoparticle dispersions are more compatible with green and eco-friendly manufacturing techniques.…”