Studies on organic electroluminescent thin film devices

Abstract

The progress of information technology promotes the development of new light emissive display devices. As one of great potential display techniques, organic electroluminescent (EL) thin film devices has characterized by the low driven voltage, high fluorescence quantum efficiencies, wide emitting spectrum and physical flexibility, attract much more attentions around the world in the last few years[1] [2]. Different from inorganic electroluminescent thin film device, organic EL thin film device are based on the injection effect for luminescence, that is due to the recombination of electron and holes in the diode junction region, therefore organic EL thin film device is one kind of LED device. It is important to construct an organic thin film diode structure. The currency problem is how to produce an organic LED diode of high lighting efficiency and of long working time. There are two ways to improve the device performance, one is from the material point of view, that is to say by finding out new EL materials, by the different doping methods or by the combination or a new design organic-inorganic compound to arrive the goal; the second way to realize the performance is by improving coating process, or optimization thin film diode structure. In this paper, we present our primary research works in organic EL thin film devices.