5.4: A High Work Function Hole-Injection Material for Enhanced OLED Performance

A new material, DuPont Buffer (DB), has been developed in DuPont Displays for use as a hole-injection layer in OLEDs. DB is a unique water-based, electrically conducting polymer dispersion which forms high quality, and high work-function films, even from pH neutral dispersions by various methods, including spin-coating and ink-jetting. This presentation reports on basic properties of DB, and improved device efficiency (2–3×) and operating lifetime (up to 20×) over a commercially available buffer material.