Abstract
Organic electroluminescent devices are looked forward to as devices for next-generation flat panel displays, which will replace liquid crystal displays, and as environmentally friendly light sources, and aggressive research and development on them is being conducted. As organic electroluminescent devices have a multilayer structure in which organic layers are deposited on an ITO electrode, it is surmised that the shapes of the surfaces of the electrode and the organic thin films have influences on electrical characteristics and emission characteristics of the device. In this research, in addition to observation of the shapes of surfaces by AFM images of the ITO electrode deposited by vacuum deposition and sputtering and measurement of the state of element distribution and crystal structure, the shapes of the surfaces of organic films deposited on the electrodes have also been measured and the influence of the shape of the surface of the ITO electrode has been checked. Furthermore, electrical characteristics of organic electroluminescent devices with different states of interface have been measured and the influence of the state of the surface of each layer on the characteristics of the device has been studied.
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