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中文摘要：
OLED技术被认为是最有可能取代液晶显示的全新技术,而OLED中的有机电致磷光器件是近年来的研究热点。有机电致磷光器件的发光层往往采用主客体掺杂体系,主客体分子内的能量传递是磷光发光体分子被激发的主要途径,因此选择吸收能量和传递能量好的主体材料是改进有机电致磷光器件性能的主要途径之一。文章分别以PVK和CBP作为主体材料,以磷光材料Ir（ppy）3和荧光材料Rubrene作为掺杂剂,制备了不同配比的器件,研究了主体材料和掺杂剂之间的能量传递特性。结果发现,这两种主体材料分别通过Ir（ppy）3向Rubrene传递能量是主要的能量传递机制,而且CBP作为主体时能量传递比PVK更充分。另外掺入Ir（ppy）3后的器件比不掺Ir（ppy）3的器件在相同电压下的光功率明显增强。当我们增加Ir（ppy）3的浓度时,相同电压下的光功率下降,浓度猝灭效应增强。
英文摘要：
The devices with phosphorescent material tris（2-phenylpyridine）iridium [Ir（ppy）3] and fluorescent material 5,6,11,12-tetraphenylnaphthacene [Rubrene] as dopants in two kinds of host were constructed in the present study.Respectively,the two kinds of host are polyvinylcarbazole and 4,4＇-N,N-dicarbazole-biphenyl .We studied the properties of energy transfer between host materials and dopants.Firstly,the absorption and photoluminescence spectra of PVK,CBP,Ir（ppy）3 and Rubrene were measured.The spectral overlap between the photoluminescence of PVK and the absorption spectrum of Ir（ppy）3 is larger than that of Rubrene.The result of the spectral overlap for CBP is the same as PVK.It was shown that the energy transfer from the two host materials to Ir（ppy）3 is stronger than that to Rubrene.In addition,the energy transfer from Ir（ppy）3 to Rubrene is possible according to their absorption and photoluminescence spectra.We compared the electroluminescence properties of different devices.In device1 of ITO/PVK∶Rubrene∶Ir（ppy）3（100∶5∶x）/BCP（10 nm）/Alq3（20 nm）/Al and device 2 ITO/CBP∶Rubrene∶Ir（ppy）3（100∶5∶x）/BCP（10 nm）/Alq3（20 nm）/Al（x=0,3）,under the same DC bias,the electroluminescence results show that energy transfer from host to Rubrene through Ir（ppy）3 is the main mechanism.And energy transfer is much more efficient in CBP as host than in PVK.In addition,at the same voltage,the light power of the device doped with Ir（ppy）3 and Rubrene is obviously stronger than that of the device doped with Rubrene only.When the concentration of Ir（ppy）3 increases,the light power decreases at the same voltage,and the effect of concentration quenching is enhanced.
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