Designed Assembly and Integration of Colloidal Nanocrystals for Device Applications

Abstract

Colloidal nanocrystals have been intensively studied over the past three decades due to their unique properties that originate, in large part, from their nanometer-scale sizes. For applications in electronic and optoelectronic devices, colloidal nanoparticles are generally employed as assembled nanocrystal solids, rather than as individual particles. Consequently, tailoring 2D patterns as well as 3D architectures of assembled nanocrystals is critical for their various applications to micro- and nanoscale devices. Here, recent advances in the designed assembly, film fabrication, and printing/integration methods for colloidal nanocrystals are presented. The advantages and drawbacks of these methods are compared, and various device applications of assembled/integrated colloidal nanocrystal solids are discussed.

Synthesis and Thermoelectric Properties of Noble Metal Ternary Chalcogenide Systems of Ag–Au–Se in the Forms of Alloyed Nanoparticles and Colloidal Nanoheterostructures

“…On the whole, colloidal synthesis routes and bottom-up assembly procedures allow simultaneous atomic-and nanoscale-control over chemical composition and morphology of inorganic NPs and derived nanocomposites, opening new avenues in optoelectronic and energy applications. [36][37][38] Silver chalcogenides are low band gap semiconductor materials that are currently drawing much attention in several fields. Tunable emission in the near-infrared (NIR) spectral range is of potential value for biosensing and in vivo imaging, whereas solids of such materials can be utilized as photodetectors.…”

Flexible quantum dot light-emitting diodes for next-generation displays

“…Therefore, recently colloidal QDs are used as an emission component of WLEDs owing to their desirable properties, including high quantum yield, size-tunable emission spectrum, narrow emission bandwidth, and photo/ thermal stability. [13][14][15] Considerable efforts have been devoted toward realizing highly efficient QD-based WLEDs.…”

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

“…16,19,20 Even though cQDs profit from many of the advantages of solution processability, few methods exist to produce patterned assemblies with submicron resolution. 21 Inkjet 22 and electrohydrodynamic 23 printing techniques have been developed to produce patterned films and are capable of achieving submicron resolution. However, the structural definition of taller structures is poor for these techniques, making them unsuitable for high-quality photonic Bragg gratings.…”