Rapid Microwave Synthesis of Tunable Cadmium Selenide (CdSe) Quantum Dots for Optoelectronic Applications

Abstract

Quantum dots (QDs) are a hot topic in optoelectronic device research, due to tailorable absorption and emission properties. Unfortunately, the conventional methods of QD synthesis are hazardous and time-consuming. In this work, we present an alternative method of fabricating cadmium selenide (CdSe) QDs (via rapid microwave synthesis). This novel fabrication method provides a quick and efficient way to synthesize QDs that are almost identical to those commercially available. We also demonstrate the tuning of QD sizes by varying time and temperature during the growth process. Optical spectroscopy was used to measure the emission profile of QDs of various sizes. With ease repeatability, tunability, and scalability, this QD synthesis method can be integrated into a wide range of applications and optoelectronic devices.

Nonlinear Optical Properties of CdSe and CdTe Core-Shell Quantum Dots and Their Applications

“…Owing to the quantum confinement effect, the ability to control QDs size predicts the controlling of QDs various properties such as absorption and emission wavelengths. For example, CdSe QDs emission wavelength can be controlled from deep red to blue via reducing the dot radius from 20 nm to 0.9 nm [82]. This implies that in strong confinement regime limits, QDs have a great potential for massively enhanced optical properties and motivated the QDs study in a particular limit.…”

Microbial biosynthesis of quantum dots: regulation and application

“…19 Top-down synthesis involves disintegrating bulk materials into nanoscale particles using a variety of methods, such as chemical exfoliation 20 and mechanical exfoliation. 21 Bottom-up methods assemble nanoparticles from fundamental building blocks, such as atoms and molecules, using methods including microwave synthesis, 22 thermal decomposition, 23 and hydrothermal synthesis. 24 Due to the poor biocompatibility of the physically or chemically synthesized QDs, they need to undergo surface modification before being used for biological applications such as biomedical and bioimaging.…”

Time‐Dependent Polychrome Stereoscopic Luminescence Triggered by Resonance Energy Transfer between Carbon Dots‐in‐Zeolite Composites and Fluorescence Quantum Dots

“…Among the luminescence materials, quantum dots (QDs) display the advantages of high photoluminescence quantum yield (PLQY), narrow emission bands, [8][9][10] particularly tunable emission wavelength in full spectrum, [11][12][13][14] which can transmit more luminescence information in space dimension compared with the luminescence materials with single emission wavelength. However, the luminescence lifetime of QDs is rather short and usually Luminescence multiplexing shows promising application prospects in information security, yet even outstanding time division multiplexing can only carry limited luminescence information.…”