Overview
- The University of Würzburg team reported a 300 × 300 nanometer OLED nanopixel in Science Advances, led by Jens Pflaum and Bert Hecht.
- The device emits orange light as bright as a conventional 5 × 5 micrometer OLED pixel and remained functional for two weeks under ambient conditions.
- A gold cuboid electrode that also acts as a nano-antenna, insulated by a hydrogen silsesquioxane ring applied via electron-beam lithography, mitigates corner field spikes and shorting.
- Current radiation efficiency is in the ~1 percent range and only a single color has been demonstrated, with no timeline for broader color coverage or higher efficiency.
- Pixel density implied by the design suggests a 1920 × 1080 display could fit into about one square millimeter, though scaling to addressable, manufacturable arrays is still an open challenge.