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Doubling Coupling‐Out Efficiency in Organic Light‐Emitting Devices Using a Thin Silica Aerogel Layer
Author(s) -
Tsutsui T.,
Yahiro M.,
Yokogawa H.,
Kawano K.,
Yokoyama M.
Publication year - 2001
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/1521-4095(200108)13:15<1149::aid-adma1149>3.0.co;2-2
Subject(s) - materials science , aerogel , optoelectronics , layer (electronics) , substrate (aquarium) , decoupling (probability) , refractive index , oled , light emitting diode , electroluminescence , diode , coupling (piping) , nanotechnology , composite material , oceanography , control engineering , engineering , geology
An innovative way of enhancing the coupling‐out efficiency in light‐emitting diodes (LEDs) is revealed. A very low‐refractive‐index silica aerogel is placed between the substrate and the emissive layer to obtain a perfect decoupling of the propagation modes within the emissive layer from the glass substrate. The Figure shows an ultrathin emissive layer on a glass substrate with (left) and without (right) an aerogel spacer layer under UV irradiation (see also cover).