1420 Molecular Biology Bldg.
Joseph Shinar, Professor, , Department of Physics and Astronomy
Abstract: OLEDs are increasingly penetrating the display and solid state lighting (SSL) markets. The current record efficiency of an OLED pixel is > 200 lm/W, or more than twice that of the most efficient fluorescent tubes. The efficiency of white OLED lighting panels, however, is currently much lower. OLED operating lifetimes, at brightness levels of > 1,000 Cd/m2 (fluorescent tube brightness is typically ~3000 Cd/m2) can exceed 20,000 h for blue and 60,000 h for green and red pixels. Yet there are still outstanding fundamental luminescence quenching issues stemming from carrier and excited state dynamics, and other issues and challenges such as light out coupling, solution processing, and transparent electrodes. I will discuss the basic science and engineering underlying these challenges and approaches to overcome them.