We demonstrate optimized viewing-angle characteristics from top-emitting organic light-emitting devices by integrating a periodic microstructure into the cavity. A holographic lithography technique combined with filling process of the groove by spin coating of a polymer film has been employed to enable its periodically and gradually changed cavity length and suppress the viewing-angle dependence of the peak emission wavelength and intensity. The theoretical and experimental results support that the proposed microstructured cavity can resolve the angular-dependence effect in a very simple and effective way, and a desired omnidirectional emission has been obtained.
© 2012 Optical Society of America
Original Manuscript: September 15, 2011
Revised Manuscript: October 26, 2011
Manuscript Accepted: November 14, 2011
Published: January 6, 2012
Yue-Feng Liu, Jing Feng, Yan-Gang Bi, Jun-Feng Song, Yu Jin, Yu Bai, Qi-Dai Chen, and Hong-Bo Sun, "Omnidirectional emission from top-emitting organic light-emitting devices with microstructured cavity," Opt. Lett. 37, 124-126 (2012)