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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 26, Number 9
BKCSDE 26(9)
September 20, 2005 

Microcavity Effect of Top-emission Organic Light-emitting Diodes Using Aluminum Cathode and Anode
Chang-Jun Lee, Young-Il Park, Jang-Hyuk Kwon, Jong-Wook Park*
Electroluminescence, Top emitting, Microcavity, OLEDs
We report microcavity effect of top emission organic light-emitting diodes (OLEDs) by using Al cathode and anode, which are feasible for not only top emission EL and angle dependant effects but facile evaporation process without ion sputtering. The device in case of Alq3 green emission showed largely shifted EL maximum wavelength as 650 nm maximum emission. It was also observed that detection angle causes different EL maximum wavelength and different CIE values in R, G, B color emission. As a result, the green device using Alq3 emission showed 650 nm emission (0o) to 576 nm emission (90o) as detection angle changed. We believe that these phenomena can be also explained with microcavity effect which depends on the different length of light path caused by detection angle.
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