| 초록 |
Since the first demonstration of organic based light emitting diodes, organic electronics has attracted much attention due to the distinctive processing advantages of organic materials, such as low-cost, lightweight, mechanical flexibility, etc. Switching and its associated memory phenomena, in which a device exhibits two states of different conductives at the same applied voltage, in organic and polymeric materials have been studied for more than 30 years. In spite of this long history and of the obvious importance of memories in the modern electronics, the development of high performance and cheap organic and polymeric memories is an exception in the rapid growth of the literature related to organic devices. This presentation introduces the research trend for organic memory devices and particularly discuss devices with the tri-layer structure, organic/metal-nanocluster/organic, interposed between two electrodes have been systematically studied by varying the thickness of the organic layers and the metal-nanocluster layer. Electrical bistabile devices have been studied by fixing the metal-nanocluster layer thickness and changing the organic layer thickness. Devices fabricated in this fashion exhibit either electrical bistability or current step, depending on the thickness of the metal-nanocluster layer. The evolution of the electrical current step is observed for devices fabricated by fixing the organic layer thickness and changing the metal-nanocluster layer thickness. Discussions concerning the observed phenomena are presented. |
