In this paper entitled ‘Transparent and color-tunable organic light-emitting diodes with highly balanced emission to both sides‘ we demonstrate transparent, two-color, stacked OLEDs that allow for balanced top- and bottom-emission. Making use of ultra thin, composite metal electrodes, this design avoids the use of ITO, such that this architecture can be transferred to flexible substrates. Careful optical design made it possible that the luminance of the device is virtually identical to both viewing directions, which is a great improvement over many earlier device layouts.
The US Department of Energy is supporting R&D efforts to realize solid state lighting (SSL) using both LEDs and OLEDs through their DOE SSL R&D program: the Multi-Year Program Plan. Now DOE recently published to separate videos with experts’ views on the matter. I always find it very beneficial to have the both technologies – LEDs and OLEDs – very close together – be it in DOE workshops or now in this digital format – because it allows to interact directly between the different technology camps. In the end, both system have in common that their are high efficiency, environmentally friendly concepts that should find highest market acceptance/share at the earliest possible time.
Today will be our ‘device focus’ day. We are starting out in the morning with high performance OLEDs, both monochrome and white. Our first invited talk, given by Wolfgang Bruetting, will put the spotlight on emitter orientation and it’s impact to light outcoupling in OLEDs. Junji Kido will present their latest efforts on high performance white OLEDs for general lighting – it’s gonna be bright. After his talk, we switch gears a little with Russ Holmes’ talk on recombination in OLEDs, answering the question, which morphology and material composition is best.
After lunch break, Zheng-Hong Lu will put another focus on the impact of the device complexity on its overall performance (Is simpler also better? See yourself). Later this afternoon, Klaus Meerholz will talk about light-emitting organic memories – less of a mainstream topic, which makes it even more exciting to see the results.
So check the program, adjust your schedule and come along. We are looking forward to see you.
PS: Our today’s contributed candy is the presentation of Matthew S. White, where we will see the thinnest OLEDs ever made (they are flexible, stretchable, and deformable).