Luminescent material composition, ink, luminescent device and display device
By using the combination of main material and polarity adjustment material in OLED devices to adjust the electron-hole injection balance, the problems of low life of blue cells and difficult charging balance adjustment in OLED devices are solved, and the device efficiency and life are improved.
Patent Information
- Application Number
- CN202410947513.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-07-08
AI Technical Summary
Existing OLED devices have challenges in low cost, large area and energy-saving manufacturing of medium and large-size display panels under the demand for high-comprehensive performance products, especially in low cost, large area and energy-saving manufacturing of medium and large-size display panels. The blue unit has a low life and high charge balance adjustment, resulting in color shifts and degraded device performance.
Using a luminescent material composition containing a host material and a polarity adjustment material, the ratio of the zero-field hole mobility and the zero-field electron mobility of the host material is not equal to 1. The electron-hole injection equilibrium is adjusted by adding a polarity adjustment material to avoid excessive narrowing of the exciton composite region and triplet-triplet state annihilation phenomenon, and improve device efficiency and life.
Effectively adjust the charge balance of OLED devices, extend the device life, improve current efficiency and brightness stability, solve the problem of low life of blue cells, and achieve efficient charge balance and device performance improvement.