亚单层黄色有机发光器件制备与光电性能研究

采用掺杂薄层作为亚单层有机发光技术,利用沉积在有机发光器件发光层中的亚单层分子2-methyl-6-2-(2,3,6,7-tetrahydro-1H,5H-benzoij] quinolizin-9-yl) ethenyl]-4H-pyran-4-ylidene] propane-dinitrile （DCM2）作为探针,同时改变DCM2层的位置,制备了四种亚单层结构的有机发光器件,对有机发光器件中激子的形成与扩散进行了研究,通过对各器件不同条件下的电致发光谱、发光强度和发光效率的对比研究,得到在N,N′-bis-(1-naphthyl)-N,N′-diphenyl-1,1′-biph-enyl-4,4′-diamine（NPB）/(8-hydroxyquinoline) aluminium（Alq）异质结界面处引入亚单层DCM2可以使DCM2分子获得的激子数量最多,获得了高效率的黄色有机发光器件.从其中总结规律,对有机发光器件制作有一定的指导作用.

Optical and Electronic Performance of Highly Bright Yellow-Emitting OLED with Sub-Monolayer

A 2-methyl-6-2-(2,3,6,7-tetrahydro-1H,5H-benzoij] quinolizin-9-yl) ethenyl]-4H-pyran-4-ylidene] propane-dinitrile (DCM2) sub-monolayer was inserted in the electron transporting layer of organic light emitting devices (OLEDs).Based on the different position of deposited DCM2 sub-monolayer,the electroluminescence (EL) spectra,brightness intensity and current efficiency of these four devices show that DCM2 sub-monolayer located at the N,N′-bis-(1-naphthyl)-N,N′-diphenyl-1,1′-biph-enyl-4,4′-diamine（NPB）/(8-hydroxyquinoline) aluminium（Alq） hetero-junction interface obtained most excitons.The obtained results will be helpful for the optimal design and operation of OLEDs.