LED Planarization Layer Composition for Light and Heat Resistance
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Solution Overview
Problem
Existing light-emitting devices (LEDs) require a planarization material that is stable and suitable for driving conditions, but current materials lack high light resistance, heat resistance, and degree of planarization.
Innovation Solution
A light-emitting device is developed with a planarization layer composed of an oligomeric compound including specific groups represented by Formulae A, B, and C, along with additional components like siloxane resin, cross-linked resin, and silane coupling agent, which are solvent-free and cured at temperatures between 150°C to 200°C.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional planarization materials are used, then the manufacturing process is simple, but the light resistance, heat resistance, and degree of planarization are insufficient
Solution Approach 1:
The patent employs a composite material system consisting of oligomeric compound (10-50 wt%), siloxane resin (30-60 wt%), and cross-linked resin (10-30 wt%). This composite approach combines the planarization capability of oligomeric compounds with the heat resistance of siloxane resins and the structural stability of cross-linked resins, achieving high light resistance, heat resistance, and degree of planarization simultaneously
Solution Approach 2:
The patent utilizes curing temperature as a critical parameter, curing the composition at 150-200°C to transform the material properties. This parameter change enables the planarization layer to achieve optimal light resistance, heat resistance, and planarization degree by controlling the curing process within this specific temperature range
2Reliability
If existing planarization materials are used, then the material application is straightforward, but the light resistance and heat resistance are low
Solution Approach 1:
The patent specifies a curing temperature range of 150-200°C to optimize the material properties. This parameter control transforms the composition into a planarization layer with enhanced light resistance and heat resistance, achieving reliable performance under LED operating conditions
Solution Approach 2:
The combination of siloxane resin (providing heat resistance) and oligomeric compound (providing planarization) creates a composite material that simultaneously achieves high reliability in terms of light resistance and heat resistance while maintaining manufacturability through a unified curing process
3Stability of the object's composition
If conventional materials are used, then the processing is easy, but the stability under driving conditions is insufficient
Solution Approach 1:
The patent creates a stable composition under driving conditions by combining oligomeric compound (10-50 wt%), siloxane resin (30-60 wt%), and cross-linked resin (10-30 wt%). This composite structure provides enhanced stability against light degradation and heat exposure while maintaining compositional integrity during LED operation
Solution Approach 2:
The curing temperature parameter (150-200°C) is controlled to achieve optimal cross-linking and material stabilization. This parameter optimization ensures the planarization layer maintains its compositional stability and performance characteristics under various driving conditions including temperature variations and light exposure
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 resulting planarization layer exhibits high light resistance, heat resistance, and a high degree of planarization, ensuring excellent performance and stability of the light-emitting device over time.
Implementation Method 1
a planarization layer disposed between the first electrode and the second electrode, wherein the planarization layer may be prepared by curing the composition
Data Source
AI summary
A light-emitting device is provided. The light-emitting device includes a first electrode; a second electrode; a subminiature light-emitting device disposed between the first electrode and the second electrode; and a planarization layer disposed between the first electrode and the second electrode. The planarization layer is prepared by curing a composition including an oligomeric compound that includes a group represented by Formula A, a group represented by Formula B, a group represented by Formula C, or any combination thereof:Substituents in Formula A, Formula B, and Formula C may be understood as described in connection with the detailed description.