The light extraction efficiency of top-emitting organic light-emitting diodes (OLEDs) was improved by insertion of a two-dimensional (2D) diffraction layer. The 2D diffraction layer was fabricated by our original nanofabrication technique, the embedded particle monolayer method, which could form a self-assembled particle monolayer. As a result, the electroluminescence intensity of the device with the 2D diffraction layer was improved by 1.67 times (in total luminous flux) and 2.07 times (in peak wavelength). High luminance top-emitting OLEDs were fabricated using the potentially low-cost self-assembling technique.
© 2009 Optical Society of America
Original Manuscript: July 15, 2009
Revised Manuscript: October 3, 2009
Manuscript Accepted: October 6, 2009
Published: October 20, 2009
Tsutomu Nakanishi, Toshiro Hiraoka, Akira Fujimoto, Shigeru Matake, Satoshi Okutani, Hiroshi Sano, and Koji Asakawa, "Improvement of the light extraction efficiency of top-emitting organic light-emitting diodes by a two-dimensional diffraction layer fabricated using self-assembled nanoparticles," Appl. Opt. 48, 5889-5896 (2009)