TY  - JOUR
AU  - Eiselt, Thomas
AU  - Preinfalk, Jan B
AU  - Bittkau, Karsten
AU  - Gomard, Guillaume
AU  - Hanemann, Thomas
AU  - Lemmer, Uli
TI  - Inkjet-printed internal light extraction layers for organic light emitting diodes
JO  - Flexible and printed electronics
VL  - 3
IS  - 1
SN  - 2058-8585
CY  - Philadelphia, PA
PB  - IOP Publishing
M1  - FZJ-2018-01261
SP  - 015007
PY  - 2018
AB  - We have developed inkjet-printed scattering layers for enhanced light extraction in organic light emitting diodes (OLEDs). These layers are based on scattering polymer/nanoparticle composites, which are prepared from a solvent-free process and used for the outcoupling of waveguide modes to free propagating modes, thus improving the device efficiencies. Two different monomers are examined and an inkjet-printing process is developed for each of them.Wefirst analyze the inks’rheological properties, followed by the optical and morphological properties of the resulting layers. Upon integration of these printed layers into an OLED stack, the device efficiencies are increased by up to 40% with respect to an unpatterned reference device. Furthermore, we show that these internal light extraction layers improve the angular and spectral stability of the devices.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000424690800002
DO  - DOI:10.1088/2058-8585/aaa37b
UR  - https://juser.fz-juelich.de/record/843698
ER  -