Organic Luminescent Complex for Uniform White Light Emission
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Solution Overview
Problem
Organic light-emitting diodes (OLEDs) face limitations in achieving uniform white light emission due to differences in energy transfer rates between red, green, and blue dye layers, leading to color disproportion.
Innovation Solution
An organic light-emitting composite is developed, comprising a polymer matrix with cavities, where the first light-emitting material is oxidized to form radical cations and dications with different emission wavelengths, emitting white light when combined, stabilized by the polymer matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different light-emitting dyes (red, green, blue) are used in the emitting layer, then full color display is achieved, but color disproportion occurs due to different energy transfer rates between dopants
Solution Approach 1:
The patent merges the functions of multiple different light-emitting dyes (red, green, blue) into a single emitting layer by using a host-guest complex system. The host material forms a complex with guest dopants, enabling all color components to be uniformly distributed and excited within one layer, thus achieving full color display without color disproportion.
Solution Approach 2:
The host material acts as an intermediary between the excitation source and the guest dopants. The host absorbs excitation energy and transfers it to the guest dopants through energy transfer, mediating the energy distribution process and ensuring uniform energy transfer rates across different color components, thereby resolving the color disproportion issue.
2Illumination intensity
If multiple different dyes are mixed in a single layer, then white light emission is achieved, but energy transfer rate differences cause color imbalance
Solution Approach 1:
The patent applies local quality by creating distinct host-guest complex regions within the single emitting layer. Each guest dopant (red, green, blue) forms localized complexes with the host material, ensuring that energy transfer occurs locally and uniformly within each complex type, thereby maintaining color consistency while achieving white light emission.
Solution Approach 2:
The patent changes the energy transfer parameters by using a host material with appropriate energy levels that can efficiently transfer energy to all guest dopants. By selecting host and guest materials with matched energy levels, the energy transfer rates are optimized and equalized across different color components, ensuring reliable color consistency in white light emission.
3Manufacturing precision
If separate layers for red, green, and blue dyes are used, then color accuracy is improved, but device structure becomes complex and manufacturing difficulty increases
Solution Approach 1:
The patent combines multiple separate dye layers into a single emitting layer using a host-guest complex system. The host material and guest dopants are mixed at the molecular level to form a homogeneous single layer that contains all color components, dramatically simplifying the device structure while maintaining color accuracy through controlled energy transfer.
Solution Approach 2:
The patent uses composite materials by creating a host-guest complex system where the host material and guest dopants form a composite emitting layer. This composite structure integrates multiple functional components (host for energy transfer, guests for color emission) into a single material system, reducing structural complexity while preserving color accuracy.
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 composite emits uniform white light with improved reproducibility and reliability, allowing for simple manufacturing of large-size organic light-emitting devices.
Implementation Method 1
oxidizing some of the first light-emitting materials by irradiating light on the polymer matrix
Implementation Method 2
the polymer matrix may include cavities therein, and the first light-emitting material and the second light-emitting material may be provided in the cavities of the polymer matrix
Data Source
AI summary
According to the present invention, an organic light-emitting composite and a method of manufacturing the organic light-emitting composite are provided. According to exemplary embodiments, an organic light-emitting composite includes a polymer matrix; a first light-emitting material provided in the polymer matrix; and a second light-emitting material provided in the polymer matrix and obtained by oxidizing the first light-emitting material, wherein the second light-emitting material may have the same molecular weight as that of the first light emitting-material.