OLED Encapsulation Composition with Indole Monomer
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Solution Overview
Problem
Organic light emitting diodes (OLEDs) face damage and reduced lifespan due to exposure to external moisture and UV light, and existing encapsulation methods fail to provide adequate plasma resistance and photocuring rates.
Innovation Solution
A composition for encapsulating OLEDs comprising an indole-based photocurable monomer, a non-indole based photocurable monomer, and an initiator, which forms a barrier layer that effectively blocks UV light with wavelengths of 420 nm or less and exhibits high plasma resistance and rapid photocuring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the organic barrier layer is formed by conventional photocurable composition, then the encapsulation function is provided, but the organic barrier layer is etched by plasma during inorganic barrier layer formation, damaging the encapsulation function
Solution Approach 1:
The patent changes the chemical composition parameters of the organic barrier layer by incorporating specific compounds (cyclic carbonate, cyclic carboxylate, and their derivatives) that inherently provide plasma resistance. This compositional parameter change enables the organic barrier layer to withstand plasma exposure during inorganic barrier layer formation without etching, while maintaining its encapsulation function.
Solution Approach 2:
The patent creates a composite organic barrier layer by combining multiple functional components: cyclic carbonate compounds, cyclic carboxylate compounds, and their derivatives. This composite material approach provides both the encapsulation function and high plasma resistance, resolving the contradiction between protecting the OLED and withstanding plasma exposure.
2Reliability
If the organic barrier layer uses conventional materials, then the encapsulation is achieved, but the photocuring rate is insufficient, leading to incomplete curing and reduced reliability
Solution Approach 1:
The patent modifies the photocuring parameters by selecting compounds with appropriate photoreactivity and molecular weight. The cyclic carbonate and cyclic carboxylate compounds are chosen to achieve complete curing within a practical time frame, ensuring both high photocuring rate and reliable encapsulation function.
3Duration of action of moving object
If the organic barrier layer is designed to block UV light effectively, then the lifespan of OLED is extended, but the plasma resistance may be compromised
Solution Approach 1:
The patent employs a composite formulation of cyclic carbonate and cyclic carboxylate compounds that simultaneously provide UV absorption capability and plasma resistance. This multi-functional composite material allows the organic barrier layer to protect the OLED from UV damage while maintaining high resistance to plasma exposure during manufacturing.
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 composition significantly extends the lifespan of OLEDs by blocking UV light, improving plasma resistance, and ensuring a high photocuring rate, thereby enhancing the reliability and durability of the encapsulation layer.
Implementation Method 1
an indole based photocurable monomer, a non-indole based photocurable monomer, and an initiator
Data Source
AI summary
Provided are: a composition for an organic light emitting diode comprising an indole-based photocurable monomer, a non-indole-based photocurable monomer, and an initiator, and an organic light emitting display manufactured therefrom.