作　　者： ; ; ; ; ; ;

机构地区： 吉林大学化学学院超分子结构与材料国家重点实验室

出　　处： 《物理学报》 2006年第10期5494-5498,共5页

摘　　要： 研究了不同比例的PVK与齐聚PPV衍生物DBVP掺杂体系的能量转移和发光特性.通过对PVK,DBVP及PVK:DBVP掺杂体系的UV-vis,PL和PLE光谱的研究,分析了PVK与DBVP之间的能量转移过程.利用PVK在体系中类似于溶剂的分散作用,制备了结构为ITO/PEDOT/PVK:DBVP/LiF/Al的电致发光器件,研究了掺杂体系的电致发光性能.结果表明,在掺杂体系的光致发光和电致发光中,PVK的发射被有效地抑制,PVK与DBVP之间发生了非常有效的能量转移,通过调节PVK与DBVP的比例,可以获得蓝色和绿色发光,同时可以改善器件的发光性能,当PVK与DBVP的重量比为1∶2时,器件的绿色发光效率达到1·06cd/A,此时发光亮度为52cd/m2. The energy transfer and the luminescence properties of polyvinyl-carbazole （PVK） and oligomeric phenylenevinylene derivative （ 2,5-dodecyloxy- 1,4- （ biphenyl -enevinyl ） phenyl） （DBVP） blend system were studied. The energy transfer between PVK and DBVP was investigated by the UV-vis absorption spectra, photoluminescent excitation （PLE） spectra and photoluminescent （PL） spectra of PVK/DBVP blend system. The electroluminescence （EL） properties of the blend system were investigated by characterization with the device ITO/PEDOT/PVK： DBVP （w/w）/LiF/Al. The PL and EL spectra of PVK in the PVK/DBVP system were effectively quenched, which means the effective energy transfer between PVK and DBVP. Because PVK matrix acted as solid solvent, the emission performance of the blend system could be adjusted and improved by changing the ratio of PVK and DBVP. The luminescence efficiency is up to 1.06cd/A at 52cd/m^2, when the weight ratio of PVK： DBVP was 1：2 and the bright blue and green light emission were obtained when the ratio of PVK ： DBVP was changed from 20 ： 2 to 1 ： 2.

关 键 词： 掺杂体系 光致发光 能量转移 电致发光

领　　域： [理学] [理学]