Impact of pixel surface topography onto thin-film encapsulated top-emitting organic light-emitting diodes performances

Two different designs of top-emitting green OLEDs (Organic Light-Emitting Diodes) have been studied. The first one presents a planar OLED architecture. The second one presents an OLED having a topographic surface, so as to simulate a pixel partitioning of a display using an electrically insulating, 200 nm-thick, resist. It has been observed that the topography has a large impact on OLED performances. Studying devices using an ALD (Atomic Layer...