MAQ Magazine n. 10 / February 2019
Their optoelectronic properties change as a function of both size and shape. Larger QDs (diameter of 5–6 nm, for example) emit longer wavelengths resulting in emission colors such as orange or red. Smaller QDs (diameter of 2–3 nm, for example) emit shorter wavelengths resulting in colors like blue and green, although the specific colors and sizes vary depending on the exact composition of the QD.
Because of their highly tunable properties, QDs are of wide interest. Potential applications include transistors, solar cells, LEDs, diode lasers and second-harmonic generation, quantum computing, and medical imaging. These processing techniques result in less expensive and less time-consuming methods of semiconductor fabrication.
Quantum Dots with gradually stepping emission from violet
to deep red.
Cadmium sulfide quantum dots on cells