Organic Light Emitting Devices and Materials Integrated with Active Matrix Backplanes for Flexible Displays; Conference paper

摘要

The following paper details the development of a new phosphorescent emitting dopant molecule for organic light emitting diodes (OLEDs). A systematic series of heteroleptic tris-cyclometallated iridium compounds were fabricated. Of the molecules, the fac- Ir(dfppy)(dfppz)2 compound had the blue- est emission with the highest quantum efficiency. Phosphorescent emitting OLEDs (PhOLED) were fabricated and properties measured. The emitting dopant was integrated into a device structure and the properties measured as a function of doping concentration. The device efficiency is 20 lm/W at 100 cd/m2 and a peak emission of 498 nm. The Army's Flexible Display Center (FDC) has fabricated thin film transistors on a rigid opaque substrate that make up an active matrix (AM) backplane. ARL's OLEDs are being integrated with the AM backplanes to demonstrate high performance emissive test demonstrator displays with a 1.1' diag.