Organic Electronics: Successes in Organic Light Emitting Diodes and Display Technology

Abstract

Whereas single crystal silicon limited to 300 mm in diameter dominates the bulk of electronic devices, when electronics is required on a larger scale we have to rely on either amorphous or multi-crystalline materials. In this category, the organic semiconductors have made rapid in-roads. Among their applications, most notable successes are organic light emitting diodes (OLEDs) based displays. But, these OLEDs could also be made to emit in ultraviolet (UV) as shown through polysilanes devices. Two materials that we have investigated emit in UV or near UV. The emission spectrum could be manipulated by modifying the side groups on the main Si chain. Further discussed in the paper are full colour passive matrix displays we have made and development of thin films transistor for moving towards active matrix displays.