Lighting purpose organic light-emitting devices
have to be answer to high electrical and thermal requirements.
Design of these devices needs special engineering. The electrical current and dissipated
power distribution in an OLED needs electro-thermal field simulation. The algorithm
in our simulation tool, SUNRED, had to be extended to be able to handle
highly nonlinear electrical OLED characteristics, and nonlinear
temperature dependence. We have created an electro-thermal
model for the OLED samples given by our project partner. The
nonlinear semiconductor junction model is applied in
SUNRED. This article surveys the new OLED model and
presents the application in electro-thermal simulations. Finally
we compare the measurement, model and simulation results.