Abstract
Two-dimensional quantum dots have received a lot of attention in recent years due to their fascinating properties and widespread applications in sensors, batteries, white light-emitting diodes, photodetectors, phototransistors, etc. Atomically thin two-dimensional quantum dots derived from graphene, layered transition metal dichalcogenide, and phosphorene have sparked researchers’ interest with their unique optical and electronic properties, such as a tunable energy bandgap, efficient electronic transport, and semiconducting characteristics. In this review, we provide in-depth analysis of the characteristics of two-dimensional quantum dots materials, their synthesis methods, and opportunities and challenges for novel device applications. This analysis will serve as a tipping point for learning about the recent breakthroughs in two-dimensional quantum dots and motivate more scientists and engineers to grasp two-dimensional quantum dots materials by incorporating them into a variety of electrical and optical fields.
Highlights
The field of material science and technology is evolving rapidly and currently provides a major contribution to research in nanoscale science, motivated by the need for novel materials with fascinating properties
The properties of 2D-Quantum dots (QDs) are quite fascinating in terms of broad emissions ranging from the deep UV to near-infrared (NIR) wavelengths that mainly depend on the size-dependent quantum confinement effect (QCE), surface interaction with solvents, defects from ligands, synthesis temperature, etc
To mention a few examples, the green light emission from graphene quantum dots (GQDs) is attributed to the defect centers originated from ligands such as oxygenous functional groups, while the blue emission is due to intrinsic states in the highly crystalline structure
Summary
The field of material science and technology is evolving rapidly and currently provides a major contribution to research in nanoscale science, motivated by the need for novel materials with fascinating properties. Quantum dots (QDs) are the artificial nanocrystals having confinement in all three dimensions with nanometer size that can transport electrons By changing their sizes, the optical and electrical properties of quantum dots can be effectively tuned, resulting in the emission of specific wavelengths of light [1,2]. 2D-QDs rely on the difference in energy between the intrinsic state and the edge state, creating a significant influence on the 2D material properties [53] Another important factor affecting the PL characteristics is the doping effect as sulfur or nitrogen doping could lead to a blue-shift, whereas the PL emission peak may experience a red-shift if boron or fluoride is used for doping. We discuss in detail the characteristics, synthesis of 2D-QDs in terms of recent development in various applications, and the challenges faced in terms of device applications
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
