PIN‐OLEDs for active‐matrix‐display use

Abstract— Novaled's PIN-OLED® technology allows for highly efficient, temperature stable, and long-lived OLEDs suited for a variety of display applications. This paper delivers an overview about Novaled's state of the art, including top- and bottom-emitting structures. It is discussed how PIN-OLEDs give rise to an increased manufacturing yield. The main focus of this paper is the development of white OLEDs for display use. When the RGBW color-filter approach is used in combination with white OLEDs, the resulting full-color OLED display is able to deliver high color quality and remain highly power efficient. For such a case, the manufacturing infrastructure of OLEDs for lighting can be used. We use tandem architectures, bottom- and top-emission architectures, and developed specific high-temperature stable OLED stacks. The importance of matching color coordinates of the white OLED and the targeted display white color point is of outstanding importance. Results have mainly been achieved under the German-funded project CARO and the European-funded project AMAZOLED.