Quantum Dot Displays


In many respects, quantum dots are the ideal luminophores for adoption in the LEDs used in large-screen flat-panel displays. Quantum dot emission can be tuned over a wide electromagnetic spectrum range. Selecting the optimum quantum dot enables emission of light from 470 nm to 640 nm, nearly the entire visible spectrum. Infrared light-emitting quantum dots also exist. Quantum dot emission can be tuned across the visible spectrum, making them usable as the sole luminophore required for full-color flat-panel displays. Quantum dots offer even more unique properties not possible with other luminophores. An ideal organic EL luminophore is envisioned as one that exhibits high photoluminescence quantum efficiency, allows 100% of electrically generated excitons to emit light, allows solution processing, and features extremely high stability and color-difference stability (when compared with luminophores of the same type emitting a different color). Despite active development of polymers, dendrimers, fluorescent small molecules, and phosphorescent small molecules, a single material that fully satisfies industrial needs has yet to be obtained. Quantum dots are a new luminophore with the potential to simultaneously meet all of these needs.


As quantum dots have a narrow light-emission spectrum, their color gamut is extremely wide. This could enhance the color saturation of quantum dot displays beyond that of liquid crystal displays (LCDs) and organic EL diode (OLED) displays. Quantum dot LEDs are inorganic emitters and are thus considerably more stable than most organic light-emitting materials. Optimized quantum dot displays are bright and efficient with long lifespans, offering the potential for significant differentiation from LCDs, OLED displays, and plasma displays.