掺杂PVK薄膜中两种组分相互作用的光谱及形貌研究  

Optical and Morphological Investigation on the Interaction of Dual Dopants in Poly(N-Vinylcarzole)

作　　者：章婷[1] 徐征[1] 滕枫[1] 钱磊[1] 王永生[1] 徐叙瑢[1] 

机构地区：[1]北京交通大学光电子技术研究所

出　　处：《光谱学与光谱分析》2006年第5期790-793,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(10374001;60576016;10434030);"973"国家重大基金项目(2003CB314707);北京交通大学攀登计划基金(PD197;PD198)资助

摘　　要：将两种荧光材料Alq3和DCJTB同时掺杂到聚合物PVK中,通过混合薄膜的光学及电学性质研究了能量传递过程及电荷陷阱作用。同时用AFM分析了不同掺杂浓度下混合薄膜的相分离现象。发现随着DCJTB染料比例的增加,两种染料在PVK中的分散越来越均匀,说明在双掺杂体系中存在Alq3和DCJTB的某种作用,这种作用打散了混合物中Alq3的聚集,但随着掺杂浓度的进一步增加,DCJTB形成了自己独立的电荷传输通道,从而降低了电致发光器件的启亮电压。The effect of optical and electrical properties of poly（N-vinylearzole） （PVK） doped with two dyes, i.e. 8-tris- hydroxyquinoline （Alq3） and 4-（dicyanomethylene）-2-tert-butyl-6 （1, 1, 7, 7-tetramethyljulolidyl-9-enyl）-4H-pyran （DCJTB）, on the energy transfer and charge trapping processes was investigated. The phase separation in blends film at different doping concentration was also studied. More homogeneous dispersion of dyes in PVK with increasing doping concentration was showed. The results indicate that there is a certain interaction of Alq3 and DCJTB in this dual-doped system. It is the incorporation of DCJTB that untangled the aggregation of Alq3 owing to the interaction of DCJTB and Alq3. But for higher doping concentration, DCJTB results in an isolated charge transport channel that decreases the electroluminescence （EL） operating voltage.

关 键 词：掺杂 相分离 电致发光 

分 类 号：TN383.1[电子电信—物理电子学]