An Organic light-emitting diode (OLED) is very promising device for a flat panel display and an illumination applications due to the possibility of very thin and flexible structures, large area emission, high brightness and low power consumption. To realize a high efficiency is one of the most important issues for these applications. Improvements in OLED efficiency are studied via the introduction of photonic crystal (PC) structures, which are expected to realize the versatile control of light. We fabricate two-dimensional PC structures in the organic and indium-tin-oxide anode layers in which most of the light is confined. This results in light extraction from the waveguide mode. Improvements of 20 and 130% are observed in the spectrally-integrated intensity and the peak intensity, respectively, in comparison with samples without PCs. As the thickness of the organic layer is reduced, lower operating voltages are found to maintain the light-extraction efficiency. We can expect further improvement in the overall efficiency by optimizing this structure.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.