High luminance efficiency and low voltage organic light-emitting diodes with NPB/LiF multiple layers

摘要

Organic light-emitting diodes (OLEDs) with NPB/LiF multiple layers were proposed and fabricated. It was found that the insertion of NPB/LiF multiple layers can balance the charge injection and transport, which is helpful in enhancing the performance of OLEDs. It was also found that we can achieve the device with the best performance from the OLED with three pairs of LiF/NPB (0.3nm/15nm).