Vacuum Deposited Organic Light Emitting Devices on Flexible Substrates

摘要

The objective of this eight year program was to demonstrate both passive and active matrix, flexible, small scale displays based on small molecular weight organic light emitting device (OLED) technology. The team comprised the University of Southern California, Universal Display Corporation, and Hughes Research Laboratories, and was led by Princeton University (PI: stephen R. Forrest). The primary platform (device structure for research) at the outset of the program in 1994 was a stacked, full color OLED (SOLED) based on fluorescent emission. It was our objective to integrate SOLEDs on flexible active matrix backplanes based on small arrays of silicon-on-insulator transferred in thin film form from a silicon wafer 'handle.' Among the accomplishments of this program were the demonstration of transparent (TOLED), stacked flexible (FOLED), and ultrahigh efficiency phosphorescent OLEDs (PHOLED) . Also, the use of several manufacturing technologies for the production of OLED displays were created and demonstrated, most notably the proprietary process of organic vapor phase deposition (OVPD).