Abstract
Lighting consumes a significant amount of generated electrical
power in developing countries, and it uses over 20% of the energy supplied
in developed countries. Therefore, semiconductor-based light sources with
high energy efficiencies are critical technologies for the reduction of global
carbon footprint. As an emerging lighting technology, organic light-emitting
diode (OLED) has received huge worldwide attention in recent years, partially
driven by its success in the flat-panel display market and partially driven
by its technology virtues such as an unique thin, flat, foldable form factor.
In this review, we will provide an overview on the current status of OLEDs
for lighting applications. Specifically, a detailed overview of the state-of-the-art
white OLED design concepts including their working principles will be presented.
A brief overview on the current status of out-coupling techniques suitable
for white OLEDs will also be discussed.
© 2013 IEEE
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