Journal or Book Title
Applied Physics Letters
A dramatic spectrally narrowed edge emission (SNEE) from small molecular organic light-emitting diodes at room temperature, with a full width at half maximum of 5–10nm, is described. The results show that this emission is due to irregular waveguide modes that leak from the indium tin oxide anode to the glass substrate at a grazing angle. Measurements of variable stripe length devices exhibit an apparent weak optical gain, but there is no observable threshold bias associated with this SNEE. Hence this apparent “optical gain” is suspected to result from misalignment of the propagating leaky waveguide mode and the collecting optics.
Copyright 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Tian, Yun; Gan, Zhengqing; Zhou, Zhaoqun; Lynch, David W.; Shinar, Joseph; Kang, Ji-Hun; and Park, Q-Han, "Spectrally narrowed edge emission from organic light-emitting diodes" (2007). Physics and Astronomy Publications. 108.