Biscarbazole derivative host materials and green emitter for OLED emissive region
申请人:Yamamoto Hitoshi
公开号:US09966541B2
公开(公告)日:2018-05-08
An organic electroluminescence device utilizes a novel combination comprising one or more biscarbazole derivative compounds as the phosphorescent host material in combination with a green phosphorescent dopant material in the light emitting region of the device, where the biscarbazole derivative compounds are represented by a formula (1A) or (1B) below; where A1 represents a substituted or unsubstituted nitrogen-containing heterocyclic group having 1 to 30 ring carbon atoms; A2 represents a substituted or unsubstituted aromatic hydrocarbon group having 6 to 30 ring carbon atoms, or substituted or unsubstituted nitrogen-containing heterocyclic group having 1 to 30 ring carbon atoms; X1 and X2 each are a linking group; Y1 to Y4 each represent a substituent; p and q represent an integer of 1 to 4; and r and s represent an integer of 1 to 3; and the green phosphorescent dopant material is a phosphorescent organometallic complex having a chemical structure represented by LL′L″M wherein M is a metal that forms octahedral complexes, L, L′, and L″ are equivalent or inequivalent bidentate ligands wherein each L comprises a substituted or unsubstituted phenylpyridine ligand coordinated to M through an sp2 hybridized carbon and N; and, one of L, L′ and L″ is different from at least one of the other two.
一种有机电致发光器件利用了一种新颖的组合,其中包括一种或多种双咔唑衍生物化合物作为器件的磷光主体材料,与器件的发光区域中的绿色磷光掺杂材料相结合,其中双咔唑衍生物化合物由下面的式(1A)或(1B)表示;其中A1代表具有1到30个环碳原子的取代或未取代的含氮杂环基团;A2代表具有6到30个环碳原子的取代或未取代的芳香烃基团,或具有1到30个环碳原子的取代或未取代的含氮杂环基团;X1和X2各自是一个连接基团;Y1到Y4各代表一个取代基;p和q代表1到4的整数;r和s代表1到3的整数;绿色磷光掺杂材料是一种具有化学结构LL′L″M的磷光有机金属配合物,其中M是形成八面体配合物的金属,L、L′和L″是等效或不等效的双齿配体,其中每个L包括一个通过sp2杂化碳和N与M配位的取代或未取代的苯基吡啶配体;而且,L、L′和L″中的一个与另外两个中的至少一个不同。