Nanodots and Quantum Dots
A quantum dot is a single crystal of semiconducting material, measuring only a few nanometers in diameter. With enhanced electrical and optical properties, quantum dots are the cutting-edge of nanotechnology.
Key Features and Applications
- When excited, these materials confine electrons and holes. The smaller the dot, the greater the confinement energy, leading to higher energy absorption and emission. This means more efficient photon management for your applications.
- Our selection of quantum dots guarantees high purity with properties including, chemical inertness, high tolerance, or low toxicity.
- Quantum dots find use in a wide range of applications. With good biocompatibility, they are ideal for drug delivery and bioimaging; or with excellent photoluminescent quantum yields, they have huge potentials in solar cells and LED displays.
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More on Quantum Dots
The most studied quantum dots are metal chalcogenide dots. These are based on semiconductors such as cadmium selenide, indium phosphide or lead(II) sulfide. The bandgap of such quantum dots can be tuned throughout the entire visible spectrum simply by changing their size during chemical synthesis.
For the highest photoluminescence quantum yields (PLQY), a shell structure is usually required. In this arrangement, a second semiconductor encapsulates the nanocrystal. This material passivates surface defects of the emissive core which would otherwise act as non-radiative recombination sites for excitons.
Due to their high PLQY, relative ease of fabrication and wide emission-colour tunability, quantum dots having this type of structure are especially suitable for display and imaging technologies. Arleady, you can find them in commercial products such as televisions.