Study On Photoelectric Performances Of Wide-gap Organic Materials And Their Application In Electroluminescent Devices

Organic light-emitting devices (OLEDS) had been attracting much attention for their potential used in flat display panel. Since Tang first reported on OLEDS with high luminance and low turn on voltage, OLEDs had developed rapidly on materials and structures.Wide-gap materials are widely used in OLEDs, such as short wavelength light-emitting (blue and UV) layers, most hosts for electrophoshporescence, some hosts for electrofluorescence (especially for blue ones), and charged carrier and exciton blocking layers. Consequently, the synthesis of more useful wide-gap materials for various applications is very important for the improvement of OLED in their performances. Compared with inorganic materials, blue light-emitting organic materials are easier to realize. However, their performances are not up to the level of other light-emitting materials in terms of luminance, efficiency, or chromaticity. Hence, blue electroluminescent materials and devices with high performances play a key role in the study of OLED. Electro-optical characteristics of several wide-gap blue electroluminescent materials and devices are studied in this thesis.