Organic Compound Structure for OLED Luminous Efficiency
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Solution Overview
Problem
The luminous efficiency, stability, and life of light-emitting materials used in OLED elements, particularly those emitting blue light, are low, limiting the improvement of OLED element performance.
Innovation Solution
An organic compound with a specific structure, represented by formula (1), is introduced, which enhances conjugation and resonance effects by incorporating carbazole-like groups and heterocyclic rings, improving the performance of the organic compound and the light-emitting element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional light-emitting materials are used in OLED elements, then the device can be manufactured with simple composition and process, but the luminous efficiency, stability, and service life are low
Solution Approach 1:
The patent employs composite material design by combining carbazole-like groups with heterocyclic rings in a single molecular structure. This integration creates a material that simultaneously achieves high luminous efficiency, improved stability, and extended service life while maintaining compatibility with conventional OLED manufacturing processes. The composite structure allows the material to fulfill multiple performance requirements without complicating the overall device composition or fabrication process.
2Illumination intensity
If blue light emitting materials are used to achieve high brightness and wide viewing angle, then the display performance is improved, but the luminous efficiency and service life are reduced
Solution Approach 1:
The patent applies parameter changes by modifying the molecular structure of blue light emitting materials through the incorporation of carbazole-like groups and heterocyclic rings. These structural modifications alter key parameters such as HOMO-LUMO energy levels, charge transport properties, and exciton formation mechanisms. The changed parameters enable the material to maintain high brightness and wide viewing angle characteristics while simultaneously achieving improved luminous efficiency and extended service life, thereby resolving the trade-off between display performance and durability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The organic compound significantly increases the luminous efficiency and extends the luminescent life of the light-emitting element, thereby enhancing the overall performance of OLED elements.
Implementation Method 1
The organic substance in the organic layer is used to convert electrical energy into light energy, thereby realizing organic electroluminescence
Implementation Method 2
the injected holes meet with the injected electrons to form excitons, which emit light when they transition back to a ground state, thus realizing luminescence of the organic electroluminescent element
Data Source
AI summary
Embodiments of the present disclosure provide an organic compound, a mixture, a composition, a light-emitting element, and a display panel. The organic compound has a structure represented by the following formula (1). In the formula (1), Z is selected from CR1R2, NR3, O, or S; X and Y are each independently selected from O or NR4, R1—R4 are each independently selected from a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C6-C30 aromatic group, or a substituted or unsubstituted C5-C30 heteroaromatic group; and R1 and R2 are connected to form a ring or independent of each other.