Quantum Dots and Applications

Abstract

It is the unique size-dependent band gap of quantum dots (QDs) that makes them so special in various applications. They have attracted great interest, especially in optoelectronic fields such as light emitting diodes and photovoltaic cells, because their photoluminescent characteristics can be significantly improved via optimization of the processes by which they are synthesized. Control of their core/shell heterostructures is especially important and advantageous. However, a few challenges remain to be overcome before QD-based devices can completely replace current optoelectronic technology. This Special Issue provides detailed guides for synthesis of high-quality QDs and their applications. In terms of fabricating devices, tailoring optical properties of QDs and engineering defects in QD-related interfaces for higher performance remain important issues to be addressed.

The utilization of quantum dot labeling as a burgeoning technique in the field of biological imaging

“…Techniques such as microinjection and electroporation offer potential solutions, each with its own set of advantages and limitations. Microinjection provides precision and the capability for direct nuclear delivery, 61 while electroporation offers a more scalable approach for delivering QDs to multiple cells. 62 The application of quantum dots in the eld of single molecule tracking, with its extraordinary brightness and stability, provides an unprecedented detailed perspective for revealing molecular dynamics and interactions in living cells.…”

Direct Laser Writing of Functional QD–Polymer Structure with High Resolution

“…Because of the quantum confinement effect, the absorption and emission spectra of QDs can be continuously and finely tuned over wavelengths ranging from deep ultraviolet to mid-infrared simply by changing the size, shape, and composition of the QDs. Therefore, functional QD–polymer nanocomposites are ideal materials for achieving a highly luminescent and broadband absorptive filter microstructure [ 8 , 9 , 10 ]. Conventional processing methods, such as vacuum deposition and photolithography, face some challenges in the fabrication of polymer nanocomposites, including high vacuum environments, expensive customized masks, and complicated and time-costly procedures.…”

Transient Absorption Analysis on Energy Transfer from Carbon Quantum Dots to Tungsten Disulfide

“…In recent years, composites composed of 0D quantum dots (QDs) and 2D transition metal disulfides (TMDs) have attracted wide attention in the application of optical devices. – Owing to their excellent photostability, wide excitation, narrow emission, and biocompatibility, – QDs have been favored by researchers in many fields. – The composite materials of QDs and TMDs can not only give full play to the high quantum efficiency and photoluminescence (PL) tunability of QDs – but also make good use of the high electron mobility of TMDs. – It makes 0D–2D composite light-emitting devices, such as transistors, , photodetectors, , and solar cells, a promising candidate.…”