OLED Polycyclic Emitters for Direct Saturated RGB Emission
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Solution Overview
Problem
Existing organic light emitting diodes (OLEDs) face challenges in achieving saturated red, green, and blue pixel emissions required for full color displays, with conventional methods relying on absorption filters for white light emission leading to inefficiencies.
Innovation Solution
Development of a compound with a specific structure (Formula I) for use in OLEDs, comprising non-aromatic monocyclic or multicyclic rings, with specific substituents and linkages, enabling direct emission of saturated colors without the need for filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If absorption filters are used to produce saturated colors from white light emission, then color saturation can be achieved, but device complexity and energy loss increase
Solution Approach 1:
The patent extracts and eliminates the color filter components from the OLED structure. Instead of using white light emission passed through absorption filters, the invention directly incorporates emissive materials that generate saturated red, green, and blue light inherently, removing the unnecessary filtering step and reducing device complexity
Solution Approach 2:
Rather than generating white light and filtering out unwanted wavelengths, the patent inverts the approach by directly emitting saturated colors through specially designed emissive materials. This inversion eliminates the need for filters and improves energy efficiency by avoiding the absorption and re-emission process
2Illumination intensity
If absorption filters are used to produce saturated colors from white light emission, then color saturation can be achieved, but energy efficiency decreases
Solution Approach 1:
The patent removes the energy-wasting absorption filter step from the light generation process. By directly emitting saturated colors through tailored emissive materials, the system avoids the energy loss associated with absorbing and re-emitting light through filters
Solution Approach 2:
The patent changes the fundamental parameter of light generation from white light emission followed by filtering to direct saturated color emission. This parameter change in the emission mechanism eliminates energy loss through absorption and improves overall energy efficiency
3Ease of manufacture
If conventional materials are used in OLEDs, then manufacturing cost is reduced, but performance and color saturation are compromised
Solution Approach 1:
The patent employs composite emissive materials with specific molecular structures designed to emit saturated colors directly. These composite materials combine the cost-effectiveness of organic materials with tailored optical properties that enable saturated red, green, and blue emission without requiring expensive filter assemblies
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 compound allows for direct emission of saturated colors, improving efficiency and reducing the complexity of OLEDs by eliminating the need for color filters, thereby enhancing display performance.
Implementation Method 1
OLEDs make use of thin organic films that emit light when voltage is applied across the device
Data Source
AI summary
Provided are organic polycyclic compounds comprising a fused ring system of at least three rings which are fused together, of which at least one ring is a 6-membered aromatic ring. Also provided are formulations comprising these organic polycyclic compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these organic polycyclic compounds.