ABSTRACT
Organic light-emitting devices (OLEDs) based on molecular materials have been one of the most important organic optoelectronic devices. These devices have now been widely used for commercially mobile displays as well as for flat screen TVs. Because of the rapid progress made in device efficiency and lifetime, OLEDs are now even considered for solid state lighting applications to replace conventional incandescent light bulbs. In this chapter, we will first review the basic device physics, the operation principle, and different device architectures to achieve high efficiency and high brightness. We will then present a detail description of the materials used for OLED fabrication. Specifically, the requirements for electrode materials, carrier transport and injection materials, emitting hosts and dopants will be discussed in detail.
