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Ever since the efficient and small molecular organic light-emitting diode (OLED) was reported for the first time by Tang and VanSlyke in 1987 [1], enormous interest has been shown in developing the emitting materials in order to realize high-resolution full-color flat panel displays that can provide a long lifetime. However, the performance of blue emitting material is still not sufficient for their applications. There are very few re-ports of OLEDs with a deep blue color, high efficiency and a long operational lifetime [2-5]. Among the three principal colors necessary for display ap-plications, or red, green and blue, blue-emitting materials and devices are particularly in need of improvement in terms of effi-ciency and color purity in comparison to green and red emitters. In recent years, developing a deep blue electroluminescence (EL) color with a CIEy coordinate value of 0.15 has been considered essential [6] because such emitters can effectively reduce the power consumption of a full-color OLED panel and can also be utilized to generate emission of other colors via energy transfer to a matching emissive dopant [2,7]. While high-efficiency green and red emitting colors can be readily obtained by doping the commonly used guest materials, such as tris(8-ydroxyquinolinato) aluminum(Alq

Study of Deep Blue Organic Light-Emitting Diodes Using Doped BCzVBi with Various Blue Host Materials