Light Outcoupling Technologies
Pp. 62-88 (27)
Yibin Jiang and Shuming Chen
This chapter gives comprehensive description of the light outcoupling
technologies for organic light-emitting diodes (OLEDs). Some state of art techniques
will be introduced in detail. This chapter consists of three parts. The first part analyzes
the light distribution in OLED with two models: ray optics model and dipole
interference model. The second part introduces the external extraction structures, which
can extract the light trapped in the substrate. The last part describes the more effective
outcoupling technologies, the internal extraction structures, which can couple out not
only the light in the substrate but also the light trapped in the active layers of the
device. Finally, a conclusion will be given.
Air mode, Dipole interference, External extraction structure, Internal
extraction structure, Metal nanoparticles, Microlens array, Nanostructured random
scattering layer, Outcoupling, Perforated hole injection layer, Photonic crystal,
Ray optics, Scattering film, Substrate mode, Surface plasmon, Total internal
reflection, Waveguide mode.
Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong.