PROCEEDINGS ARTICLE | March 1, 2010
Proc. SPIE. 7599, Organic Photonic Materials and Devices XII
KEYWORDS: Silica, Etching, Electrodes, Organic light emitting diodes, Metals, Oxygen, Organic materials, Silicon films, Reactive ion etching, Telescopic pixel displays
We have proposed a novel encapsulation method with simple process in comparison with conventional encapsulation
technique. Here, the encapsulation film of silicon dioxide is steady for external environment because this can be
designed to cover the emitting organic material from air. Silicon dioxide of 220 nm was deposited by plasma enhanced
chemical vapor deposition and etched by reactive ion etching system. Then, Alq3 was used as a material to emitting layer
in the green (organic light emitting device) OLED and TPD in the hole transportation layer was used for the harmonious
transportation of hole. Luminance was measured with 40 hour intervals at the air-exposed condition. After 400, 1,000,
1,600, and 2,000 hours, luminance of green OLED were 7,366, 7,200, 6,210, and 5,100 cd/m2, respectively. Luminance
of green OLED doesn't decrease until 2,000 hours. As a results, proposed encapsulation technique can increase the life
time of green OLED.
