- Photostable and keep their fluorescent properties for several years. – Higly resistant to light (100-1000 times higher that organic fluorescers).
- Provide high fluorescence quantum efficiency: up to 90%.
- Have wide excitation spectrum, from UV to IR (200-1000 nm)
- Due to narrow peaks of fluorescence (25-40 nm) provide excellent color purity.
- Higly resistant to chemical degradation.
Quantum dots: properties, applications, prospects
Quantum dot is a nanocrystal of inorganic semiconductor material (silicon, indium phosphide, or cadmium selenide). Prefix “nano” means one billionth part: the size of these crystals vary from 2 to 10 nanometers. Such a small size makes electrons in nanoparticles behave in an unusual way compared to semiconductor particles of regular size. Ability to control the wavelength of emitted light using semiconductor particles resizing allows getting photostable luminophores. Depending on particles’ size, these luminophores in reply to external influences emit light of stable wavelength and particular color. Solutions based on quantum dots exceed traditional organic and inorganic luminophores using a variety of criteria that are important for technologies where precise adjustible luminiscence is necessary. Advantages of quantum dots: