Blue phosphorescent organic light-emitting diode, display panel and display device
By introducing blue fluorescent hole-blocking and electron-blocking materials into blue phosphorescent organic light-emitting diodes (OLEDs), the carrier mobility is improved, solving the problems of high voltage and low efficiency in blue phosphorescent OLEDs, and achieving voltage reduction and lifespan extension.
CN122121433APending Publication Date: 2026-05-29EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
- Filing Date
- 2024-11-28
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
The high operating voltage of blue phosphorescent organic light-emitting diodes leads to low luminous efficiency and a short lifespan.
Method used
Introducing blue fluorescent hole-blocking and electron-blocking materials into blue phosphorescent organic light-emitting diodes (OLEDs) can improve carrier mobility. This includes adding blue fluorescent hole-blocking materials to the hole-blocking layer and blue fluorescent electron-blocking materials to the electron-blocking layer, and optimizing the energy level and doping ratio to improve mobility.
Benefits of technology
The operating voltage of the blue phosphorescent organic light-emitting diode was reduced, which improved the luminous efficiency and extended the lifespan.
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Smart Images
Figure CN122121433A_ABST
Abstract
The application discloses a blue phosphorescent organic light emitting diode, a display panel and a display device. The blue phosphorescent organic light emitting diode comprises a first electrode, an electron injection layer, an electron transport layer, a hole blocking layer, a blue phosphorescent light emitting layer, an electron blocking layer, a hole transport layer, a hole injection layer and a second electrode; the hole blocking layer comprises a blue phosphorescent light emitting material host material N type and a blue fluorescent hole blocking material; and / or the electron blocking layer comprises a blue phosphorescent light emitting material host material P type and a blue fluorescent electron blocking material; the mobility of the blue fluorescent hole blocking material is greater than the mobility of the blue phosphorescent light emitting material host material N type; and the mobility of the blue fluorescent electron blocking material is greater than the mobility of the blue phosphorescent light emitting material host material P type. The technical scheme reduces the working voltage of the blue phosphorescent organic light emitting diode.
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