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Abstract
Organic light emitting devices based on quantum dots as emitting centers (QDOLEDs)
have been the subject of researcher’s interest over the past three decades. Such
interest is due to the expected superior properties of this new technology, e.g. thinner
structure, cheaper manufacturing, low power consumption, high brightness, high
contrast, wide viewing angle, and low cost over the pure organic light emitting devices
(pure-OLEDs). In addition to, the wide tunable color range (by changing the quantum
dot size), where the luminescence wavelength can be precisely tuned to cover all
visible light spectral range with a typical spectral full width at half of a maximum
(FWHM) of less than 30 nm. The narrow FWHM of (QD-OLED) results in saturated
color emission. This leads to efficient (QD-LED) even in the red and blue parts of the
spectrum. The broadly tunable, saturated color emission over the entire visible
spectrum of a single material system is unmatched by any class of organic
chromospheres.