The magic of quantum dots is their ability to tune
Post# of 22456
Posted On: 12/07/2014 2:11:19 AM
The magic of quantum dots is their ability to tune the color output of the dots, by carefully controlling the size of the crystals; as they are synthesized, so that their spectral peak output can be controlled within 2 nm, to virtually any visible wavelength. This property of QD makes the QD technology stand out from LCD.
The contender, Quantum Dots, possesses fluorescence effect, which occurs when the excited electron moves from the conduction band to its valence band, emitting a photon with a longer wavelength than the one absorbed (electron–hole recombination process). The energy difference between the absorption and emission spectra is known as the “Stokes shift”. Generally, the smaller the crystal size, the larger is the band gap. Therefore, the electron will require more energy to become excited, and in turn, will emit light with a higher energy while returning to a lower energy state. The color and emission wavelength of a QD are determined by its size and composition. QDs can emit light at wavelengths ranging from the ultraviolet (UV) to the infrared (IR).
The contender, Quantum Dots, possesses fluorescence effect, which occurs when the excited electron moves from the conduction band to its valence band, emitting a photon with a longer wavelength than the one absorbed (electron–hole recombination process). The energy difference between the absorption and emission spectra is known as the “Stokes shift”. Generally, the smaller the crystal size, the larger is the band gap. Therefore, the electron will require more energy to become excited, and in turn, will emit light with a higher energy while returning to a lower energy state. The color and emission wavelength of a QD are determined by its size and composition. QDs can emit light at wavelengths ranging from the ultraviolet (UV) to the infrared (IR).
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