studied by means of absorption and fluorescence spectra, DFT calculations, cyclicvoltammetry and spectroelectrochemistry. It is concluded that the methylene bridge in CzPh-CH2-PhCz isolates the two TCz units, whereas TCz-TCz allows extending the electronic coupling along both carbazoles. Moreover, the phosphorescence spectrum of TCz-TCz showed a high energy triplet state (2.76 eV). It was observed that
一系列N-苯基咔唑衍生物,即TCz(N-甲苯基咔唑),TCz-TCz(3,3′-连接的二聚体)和CzPh-CH 2 -PhCz(亚甲基桥连的N-苯基咔唑) ),已经通过吸收和荧光光谱,DFT计算,循环伏安法和光谱电化学方法进行了合成和研究。结论是,CzPh-CH 2 -PhCz中的亚甲基桥将两个TCz单元隔离开,而TCz-TCz允许沿两个咔唑扩展电子耦合。此外,TCz-TCz的磷光光谱显示出高能三重态(2.76 eV)。观察到CzPh-CH 2的氧化-PhCz生成电致变色聚合物,其中包含由亚甲基桥分隔的TCz-TCz二聚体单元。通过EPR光谱分析了氧化的TCz-TCz亚基,发现它是Robin and Day分类中的III类混合价离子。所有结果表明这些分子可能适合用作荧光传感中的选择性探针或用作电致发光器件中的主体材料。
ORGANIC LIGHT EMITTING DEVICE
申请人:LG CHEM, LTD.
公开号:US20190214571A1
公开(公告)日:2019-07-11
The present invention relates to an organic light emitting device comprising a light emitting layer and an electron transport layer which satisfy the following mathematical expressions, E
HOMO-ET
≤E
HOMO-BH
and E
LUMO-ET
>E
LUMO-GH
, and having improved driving voltage, efficiency, and lifetime.
An organic light-emitting device includes a first electrode; a second electrode facing the first electrode; an emission layer disposed between the first electrode and the second electrode; and a hole transport region disposed between the first electrode and the emission layer.
An organic light-emitting device includes: a first electrode, a second electrode facing the first electrode, and an organic layer between the first electrode and the second electrode, the organic layer including: an emission layer, an electron transport region between the second electrode and the emission layer, and a mixed layer between the emission layer and the electron transport region, the mixed layer including a first material and a second material, the first material and the second material being selected from a pyrrolidine-based compound and a C10-C30 polycyclicaromatic hydrocarbon-based compound, and a triplet energy EgT1 of at least one selected from the first material and the second material being 2.2 eV or greater.
一种有机发光器件包括:第一电极、面向第一电极的第二电极以及位于第一电极和第二电极之间的有机层,有机层包括:发射层、位于第二电极和发射层之间的电子传输区域以及位于发射层和电子传输区域之间的混合层:发射层,第二电极和发射层之间的电子传输区,以及发射层和电子传输区之间的混合层,混合层包括第一材料和第二材料,第一材料和第二材料选自吡咯烷基化合物和 C10-C30 多环芳烃基化合物,以及选自第一材料和第二材料的至少一种材料的三重能 EgT1 为 2.2 eV 或更高。
Organic light emitting diode and organic light emitting display device including the same
申请人:SAMSUNG DISPLAY CO., LTD.
公开号:US10008674B2
公开(公告)日:2018-06-26
An organic light emitting diode including a first compound represented by one of Chemical Formulae 1-A to 1-D and a second compound represented by Chemical Formula 2:
一种有机发光二极管,包括由化学式 1-A 至 1-D 之一代表的第一种化合物和由化学式 2 代表的第二种化合物: