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- W2082495119 abstract "A significant fraction of light generated within an organic light emitting diode (OLED) is often trapped within thestructure within waveguide modes and is unable to escape usefully from the device. Addressing this issue is ofsignificant importance, as it potentially offers a route to improve the external efficiency of OLEDs. Here, we discuss anumber of methods to improve light extraction efficiency from conjugated-polymer LEDs. Firstly we explore the use oflow finesse optical microcavities to redistribute trapped-light into externally propagating modes. The improvementsobtained by simply adopting a microcavity structure on its own are rather small, however we then show that they can beimproved significantly by improving the reflectivity of the cathode. Finally, we show that by engineering a photoniccrystal beneath the anode of a polymer LED, a significant improvement in external efficiency (by a factor of 2) can beachieved. Such an approach is anticipated to be readily scalable to a manufacturing environment." @default.
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- W2082495119 date "2007-09-13" @default.
- W2082495119 modified "2023-10-12" @default.
- W2082495119 title "Improving the light extraction efficiency of polymer LEDs using microcavities and photonic crystals" @default.
- W2082495119 doi "https://doi.org/10.1117/12.737114" @default.
- W2082495119 hasPublicationYear "2007" @default.
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