35.3: High‐Performance Tandem White OLEDs Using a Li‐Free “P‐N” Connector

Abstract

Abstract A nonmetallic connector has been developed for high‐efficiency tandem white architecture. Forming the “N” type layer using NDN‐26 doped into NET‐18 and inserting an organometallic thin layer between the “N” and “P” layers results in a high‐performance connector. An efficiency of 33 cd/A has been achieved at 6.7 V, 1000 cd/m 2 and 10000K color temperature in a fluorescent based tandem emitter. This >15% EQE device also demonstrates a half‐life of ∼80,000 h at 1000 cd/m 2 .