A light emitting device includes a first electrode, a second electrode facing the first electrode, and an intermediate layer between the first electrode and the second electrode. The intermediate layer includes an emission layer and a hole transport region between the first electrode and the emission layer. The emissive layer includes a first host, a second host, and a dopant, where the first host includes a hole transport host, and the second host includes an electron transport host or a bipolar host. The hole transport region includes a plurality of hole transport layers, each of the plurality of hole transport layers includes a carbazole-based compound, and highest occupied molecular orbital (HOMO) energy levels of the carbazole-based compounds respectively included in adjacent hole transport layers among the plurality of hole transport layers are different from each other.
本申请涉及发光装置,其包括第一电极、面对所述第一电极的第二电极以及在所述第一电极与所述第二电极之间的中间层。所述中间层包括发射层和在所述第一电极与所述发射层之间的空穴传输区。所述发射层包括第一主体、第二主体和掺杂剂,其中所述第一主体包括空穴传输主体,并且所述第二主体包括电子传输主体或双极主体。所述空穴传输区包括多个空穴传输层,所述多个空穴传输层各自包含基于咔唑的化合物,并且分别包含在所述多个空穴传输层中的相邻空穴传输层中的所述基于咔唑的化合物的最高占据分子轨道(HOMO)能级彼此不同。
LIGHT EMITTING DEVICE AND ELECTRONIC DEVICE INCLUDING THE SAME
发光装置及包括发光装置的电子设备
2023-07-18
Patent
Electronic Resource
Chinese
IPC: | H10K |
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