| Summary: | 碩士 === 國立交通大學 === 應用化學系 === 91 === In this thesis, we improved the emission efficiency of 5,6,11,12- tetraphenylnaphthacene (rubrene). Rubrene could be substituted at 2,8 position and para-position of 5,11 phenyl by introducing bulky substituents into the corresponding intermediate. 2, 8-Di (t-butyl)- 5,11-di[4-(t-butylphenyl)]- 6,12-diphenylnaphthacene (TBRb) was found to be the best among this series of compounds in terms of thermal properties and EL performance. Thermal decomposition temperature of TBRb is 20℃ higher than that of rubrene. When used in typical device structure either doped in Alq3 (Device structure A) or NPB (Device structure B), TBRb shows a 50% to 31% increase in luminance efficiency over that of Rb device without significantly effecting its color.
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