发光装置及包括发光装置的电子设备
By introducing multiple hole transport layers into the light-emitting device, the problems of insufficient efficiency and lifetime were solved, and high-efficiency light emission with low driving voltage was achieved.
CN114079018BActive Publication Date: 2026-07-17SAMSUNG DISPLAY CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SAMSUNG DISPLAY CO LTD
- Filing Date
- 2021-07-21
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing light-emitting devices are inadequate in terms of efficiency and lifespan, and require high driving voltage.
Method used
In a light-emitting device, a hole transport layer with a p-doped layer is introduced. By forming a multi-layer structure in the hole transport region, including a first undoped layer, a doped layer, and a second undoped layer stacked sequentially, the carrier injection and transport process is optimized.
Benefits of technology
This improved the efficiency and lifespan of the light-emitting device while reducing the driving voltage, thus achieving highly efficient light emission.
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Figure CN114079018B_ABST
Abstract
发光装置包括第一电极、第二电极、m个发射单元和m‑1个电荷产生层。所述m个发射单元各自包括空穴传输区、发射层和电子传输区。所述m个发射单元的至少一个发射层包括第一发射层和第二发射层，并且与p‑型电荷产生层相邻的至少一个空穴传输区包括由第一非掺杂层、掺杂层和第二非掺杂层组成的多层空穴传输层。所述第一非掺杂层和所述第二非掺杂层各自独立地由空穴传输材料组成，所述掺杂层包含空穴传输材料和p‑掺杂剂，以及与所述第一电极相邻的所述空穴传输区不包括所述多层空穴传输层。还提供了包括所述发光装置的电子设备。
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