An organic composition for an organic electroluminescent device and an organic electroluminescent device comprising the same
By using compounds with specific structures as hole and electron transport layers in organic electroluminescent devices, the problem of imbalance between hole and electron transport was solved, the recombination probability of the light-emitting layer was increased and the device voltage was reduced, thus realizing a more efficient organic electroluminescent device.
CN122206166BActive Publication Date: 2026-07-24SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
2 Cites 0 Cited by
Patent Information
- Application Number
- CN202610662515.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-14
- Publication Date
- 2026-07-24
- Estimated Expiration
- 2046-05-14
AI Technical Summary
Technical Problem
In existing organic electroluminescent devices, the imbalance between hole and electron transport leads to low recombination probability and efficiency of the light-emitting layer, and the matching of organic functional layer materials affects the device voltage.
Method used
By employing a first and second compound with specific structures as hole transport layer materials and a third compound as electron transport layer material, hole transport region and electron transport region are formed through optimization of compound structure and energy level matching, so as to achieve a balance of charge carrier transport.
Benefits of technology
This increases the carrier recombination probability of the light-emitting layer, improves device efficiency, and reduces device voltage.
✦ Generated by Eureka AI based on patent content.
Abstract
The application belongs to the technical field of OLED and specifically comprises an organic composition for an organic electroluminescent device and an organic electroluminescent device comprising the same. The organic composition comprises a first compound as a first hole transport layer material, a second compound as a second hole transport layer material and a third compound as an electron transport layer material; wherein the general structural formula of the first compound is shown as formula I, the general structural formula of the second compound is shown as formula II, and the general structural formula of the third compound is shown as formula III. The layer formed by the first compound and the layer formed by the second compound jointly constitute a hole transport region, which can match the hole mobility of the whole hole transport region with the electron mobility of the electron transport layer formed by the third compound, so that the transmission of holes and electrons to the light-emitting layer is more balanced, the carrier recombination probability of the light-emitting layer is improved, the device efficiency is improved, and the device voltage is reduced.I;II;III.
Need to check novelty before this filing date? Find Prior Art