Top Research Papers on Quantum Dots

Abstract Worldwide, enormous efforts are directed toward the development of the so‐called quantum internet. Turning this long‐sought‐after dream into reality is a great challenge that will require breakthroughs in quantum communication and computing. To establish a global, quantum‐secured communication infrastructure, photonic quantum technologies will doubtlessly play a major role, by providing and interfacing essential quantum resources, for example, flying‐ and stationary qubits or quantum memories. Over the last decade, significant progress has been made in the engineering of on‐demand qua...

The great potential of quantum dots (QDs) in photonic quantum information technology is discussed in depth and modern methods and technical solutions for the epitaxial growth and for the deterministic nanoprocessing of quantum devices based on QDs are presented.

We report semiconductor nanocrystals represent a promising class of solution-processable optical-gain media that can be manipulated via inexpensive, easily scalable colloidal techniques. Due to their extremely small sizes (typically <10 nm), their properties can be directly controlled via effects of quantum confinement; therefore, they are often termed colloidal quantum dots (CQDs). In addition to size-tunable emission wavelengths, CQDs offer other benefits for lasing applications, including low optical-gain thresholds and high temperature stability of lasing characteristics. Recent progres...

The proposed facile strategy to control the preparation of graphdiyne quantum dots (GDY-Py QDs), in which pyrene groups are covalently linked to GDY by Sonogashira cross-coupling reaction are bestowed with high stability and non-cytotoxicity and exhibit long fluorescent time, which could offer great potential in optical imaging and biomedical application.

A materials-chemistry perspective for colloidal quantum dots (QDs) in the field of display, including QD-enhanced liquid-crystal-display (QD-LCD) and Qd-based light-emitting-diodes (QLEDs) display is offered.

Methods for the chemical control of Auger recombination and Auger cooling are discussed in the context of how they illuminate the underlying mechanisms, and the current understanding of carrier multiplication in quantum dots is examined.

The development of electronics is increasingly dependent on low-cost, flexible, solution-processed semiconductors. Colloidal quantum dots are solution-processed semiconducting nanocrystals that have a size-tunable bandgap and can be fabricated on a range of substrates. Here we review developments in colloidal quantum dot electronics, focusing on luminescent, optoelectronic, memory and thermoelectric devices. We examine the role of surface chemistry in the suppression of non-radiative processes, the control of light–matter interactions and the regulation of carrier transport properties. We also...

This work embeds GaAs quantum dots into an n-i-p-diode specially designed for low-temperature operation and demonstrates ultra-low noise behaviour: charge control via Coulomb blockade, close-to lifetime-limited linewidths, and no blinking.

This research presents a new generation of high-performance quantum light sources based on semiconductor quantum dots coupled to microcavities that show their promise in long-distance solid-state quantum networks.

The attributes of QDs for optically addressable qubits in emerging quantum computation, sensing, simulation, and communication technologies are considered, e.g., as robust sources of indistinguishable, single photons that can be integrated into photonic structures to amplify, direct, and tune their emission or as hosts for isolated, coherent spin states thatCan be coupled to light or to other spins in QD arrays.

The researchers in the community is expected to foresee the great potential of CDots, and focus on the critical results obtained during the development of TQDs, paying special attention to the profound principles behind the synthetic chemistry, luminescence mechanisms and applications.

Optical energy can be transformed into electricity, photons, and chemical bonds using colloidal quantum dots as the scaffold.

In terms of their use in displays, quantum dots (QDs) exhibit several advantages, including high illumination efficiency and color rendering, low-cost, and capacity for mass production. Furthermore, they are environmentally friendly. Excellent luminescence and charge transport properties of QDs led to their application in QD-based light-emitting diodes (LEDs), which have attracted considerable attention in display and solid-state lighting applications. In this review, we discuss the applications of QDs which are used on color conversion filter that exhibit high efficiency in white LEDs, full-c...

The therapeutic, drug delivery, biosensing and bioimaging applications of GQDs are described and it is presumed that drug-GQD duo would be the next generation strategy for many unresolved therapeutic hurdles.

Perovskite light-emitting diodes (PeLEDs) with an external quantum efficiency exceeding 20% have been achieved in both green and red wavelengths 1-5 ; however, the performance of blue-emitting PeLEDs lags behind 6,7 . Ultrasmall CsPbBr 3 quantum dots are promising candidates with which to realize efficient and stable blue PeLEDs, although it has proven challenging to synthesize a monodispersed population of ultrasmall CsPbBr 3 quantum dots, and difficult to retain their solution-phase properties when casting into solid films 8 . Here we report the direct synthesis-on-substrate of films of suit...

Electrons and holes confined in quantum dots define excellent building blocks for quantum emergence, simulation, and computation. Silicon and germanium are compatible with standard semiconductor manufacturing and contain stable isotopes with zero nuclear spin, thereby serving as excellent hosts for spins with long quantum coherence. Here, we demonstrate quantum dot arrays in a silicon metal-oxide-semiconductor (SiMOS), strained silicon (Si/SiGe), and strained germanium (Ge/SiGe). We fabricate using a multi-layer technique to achieve tightly confined quantum dots and compare integration process...

Photocatalysis is a cutting-edge technology with the potential to solve environmental pollution and energy crisis. In recent years, the great advantages of semiconductor quantum dots in the field of photocatalysis have attracted widespread attention, such as excellent visible light absorption, multi-exciton effect, surface effect and adjustable energy bands. Semiconductor quantum dots have indeed met people's expectations in the field of photocatalysis and have been successfully used in hydrogen production, CO2 reduction, pollutant degradation and other fields. This review focuses on the uniqu...

This review explores the applications of CQDs in bioimaging and biomedicine, highlighting recent advancements and future possibilities to increase interest in their numerous advantages for therapeutic applications.

Zero-dimensional (0D) carbon quantum dots (CQDs), as a nanocarbon material in the carbon family, have garnered increasing attention in recent years due to their outstanding features of low cost, nontoxicity, large surface area, high electrical conductivity, and rich surface functional groups. By virtue of their rapid electron transfer and large surface area, CQDs also emerge as promising functional materials for the applications in energy-conversion sectors through electrocatalysis. Besides, the rich functional groups on the surface of CQDs offer abundant anchoring sites and active sites for t...

The engineering concerning surface ligands, additives, and hybrid composition for PQ DSCs is outlined first, followed by analyzing the reasons of undesired performance of PQDSCs and some challenges and perspectives concerning PQDs are discussed.