Electroluminescence from Single Layer Poly (N-vinylcarbazole) Films Doped with New Emitter Molecules

Organic compounds have been used for a long time as insulators in electronic devices. However the discovery of conductive polymers, the development of photoconducting organic materials, and the vast amount of research effort on conjugated semiconductors have demonstrated that some organic materials can be the basis for a wide range of electronic and opto-electronic devices [1–7]. Organic light-emitting diodes (OLEDs) have attracted a great deal of interest as display systems since their discovery by Tang [1]. Much progress has been achieved and the device performance has improved dramatically since then [2, 8–10]. One of the advantages of an OLED display over the traditional liquid crystal LCD display is that OLEDs do not require a backlight to function. This means that OLEDs draw far less power. Also, OLED displays have a wide viewing angle