Quantum dots (QDs) or semiconductor nanocrystals are semiconductor particles a few nanometres in size with optical and electronic properties that differ from those of larger particles via quantum mechanical effects. They are a central topic in …

2021年8月6日 · Zero-dimensional semiconductor quantum dots (QDs) offer strong light absorption and bright narrowband emission across the visible and infrared wavelengths and have been engineered to exhibit optical gain and lasing. These properties are of interest for imaging, solar energy harvesting, displays, and communications.

2023年6月12日 · The size of the QDs is important because it determines the strength of the quantum confinement effect. Smaller QDs exhibit stronger quantum confinement and have higher energy levels than larger QDs.

2021年4月5日 · The size of QDs are laying between molecules and bulk, typically from 1 to 10 nm and often have spherical shape. Most of QDs are composed of the elements from II to IV, III-V and IV-VI groups of the periodic table of the chemical elements [2].

2022年2月14日 · The general sizing function proposed here unifies the QD size calibration and enables researchers to assess bulk semiconductor parameters and predict the size quantization in unexplored materials.

2024年3月15日 · With the developed deep learning size classifier, we overcome the need for calibration curves for quantum dots sizing and thanks to the unified modeling approach at the basis of the total...

2021年3月1日 · Fluorescent quantum dots (QDs), defined by a diameter size of <10 nm, have been the core concept of nanoscience and nanotechnology since their inception. QDs possess many unique structural, electrochemical and photochemical properties that render them a promising platform for sensing applications.

2021年11月11日 · The fascinating optoelectronic properties of semiconductor quantum dots (QDs) originate from the quantum confinement effect; i.e., the band gap increases as the size decreases. Another significant parameter dictating the photophysics of QD is the dynamics of trapping and detrapping from the trap-states, but it is nonetheless less understood.

2022年9月24日 · Quantum dots (QDs) are nanoscaled semiconducting crystals whose physical and chemical characteristics can be tailored. The distinct properties of the QDs include quantum confinement, band gap engineering, unique luminescence, controlled electronic transport, plant bioimaging and drug delivery features.

The size of quantum dots can typically range from 2 to 10 nanometers in diameter, containing roughly 200 to 10,000 atoms. Due to quantum mechanics, at these scales, the electronic properties of the particles are quantized. The quantum confinement effect in QDs causes the band gap energy to increase as the particle size decreases.