Crosslinkable Polymer Composition for Low-Temperature Curability
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Solution Overview
Problem
Existing light emitting devices using crosslinkable compounds exhibit insufficient curability at low temperatures, limiting their performance and reliability.
Innovation Solution
A composition comprising a first and second crosslinkable polymer compound with aromatic conjugated repeating units and crosslinkable groups, specifically designed to enhance curability and charge transportability, where the crosslinkable groups are represented by certain formulas, facilitating the formation of films with improved light emitting and charge transport properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If crosslinkable compounds are used in light emitting devices, then curability is improved, but curability at low temperatures deteriorates
Solution Approach 1:
The patent uses a composite material system consisting of a crosslinkable polymer compound (with aromatic conjugated repeating units and crosslinkable groups) combined with a specific low molecular weight compound. This composite approach enables the system to achieve both good curability and low-temperature crosslinking performance, resolving the contradiction between general curability and low-temperature curability.
Solution Approach 2:
The patent changes the chemical parameters of the crosslinking system by selecting specific crosslinkable groups (epoxide, oxetane, or cyclic carbonate groups) and combining them with aromatic conjugated polymer compounds. This parameter optimization allows the system to maintain curability across a broader temperature range, particularly improving low-temperature crosslinking while preserving overall curability.
2Reliability
If crosslinkable polymer compounds with aromatic conjugated repeating units are used, then charge transportability is improved, but device complexity increases
Solution Approach 1:
The patent introduces local quality by incorporating aromatic conjugated repeating units at specific positions within the polymer structure. These localized aromatic segments provide the necessary charge transport pathways without requiring the entire material structure to be complex, thus achieving good charge transportability while controlling overall device complexity.
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 achieves excellent curability and charge transportability at low temperatures, leading to enhanced performance and reliability of light emitting devices.
Implementation Method 1
a first crosslinkable polymer compound (1) having an aromatic conjugated repeating unit and a crosslinkable group
Data Source
AI summary
A composition comprising (1) a first crosslinkable polymer compound having an aromatic conjugated repeating unit and a crosslinkable group and having at least one of a light emitting property and charge transportability, and (2) a second crosslinkable polymer compound having an aromatic conjugated repeating unit and a crosslinkable group at least one of which is different from the aromatic conjugated repeating unit in the first crosslinkable polymer compound and the crosslinkable group in the first crosslinkable polymer compound, and having at least one of a light emitting property and charge transportability, wherein at least one of the first crosslinkable polymer compound and the second crosslinkable polymer compound has a crosslinkable group represented by the following formula (Z-3) or (Z-4): in the formulae, RC represents a hydrogen atom, or a substituent such as an unsubstituted or substituted alkyl group or the like, the plurality of RC moieties may be the same or different.