Polymer Compound with Crosslinkable Groups for Light-Emitting Devices
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Solution Overview
Problem
Light emitting devices produced using existing polymer compounds do not have sufficient external quantum yield.
Innovation Solution
A polymer compound with specific constitutional units and crosslinkable groups is developed, enhancing the external quantum yield of light emitting devices. The polymer compound includes constitutional units represented by specific formulas and crosslinkable groups, improving the device's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing polymer compounds are used in light emitting devices, then the device can be produced with conventional materials, but the external quantum yield is insufficient
Solution Approach 1:
The patent modifies the chemical structure of polymer compounds by introducing specific constitutional units with crosslinkable groups, changing the material parameters to achieve higher external quantum yield while maintaining manufacturability through conventional processing methods
Solution Approach 2:
The invention creates a composite polymer compound combining light-emitting constitutional units with crosslinkable constitutional units, where the synergistic interaction between these components achieves high external quantum yield while preserving ease of manufacture through solution processing
2Reliability
If polymer compounds with crosslinkable groups are introduced to improve external quantum yield, then the device performance is enhanced, but the molecular structure complexity increases
Solution Approach 1:
The patent divides the polymer compound into distinct functional segments: light-emitting constitutional units and crosslinkable constitutional units, where each segment performs its specific function independently, simplifying the design complexity while achieving high external quantum yield
Solution Approach 2:
The crosslinkable constitutional units serve multiple functions: they enable crosslinking for device stability and simultaneously contribute to the overall light-emitting performance, reducing the need for separate functional components and simplifying the molecular structure
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 polymer compound significantly enhances the external quantum yield and luminance life of light emitting devices, making them more efficient and effective.
Implementation Method 1
a crosslinkable constitutional unit having at least one crosslinkable group selected from (XL-1) to (XL-9) or (XL-11) to (XL-17) of Group A of crosslinkable groups
Data Source
AI summary
Provided is a polymer compound which is useful for production of a light emitting device excellent in external quantum yield. A polymer compound comprising a constitutional unit represented by the formula (1), wherein a1 and a2 represent 0 or 1, ArA1 and ArA3 represent an arylene group or the like,and in each of ArA1 and ArA3 at least one atom adjacent to an atom forming a bond to the constitutional unit adjacent to the each of ArA1 and ArA3 has an alkyl group or the like as a substituent, ArA2 represents a phenylene group, ArA4 represents an arylene group or the like, RA1, RA2 and RA3 represent an aryl group or the like, and when a2 is 0, RA1 represents an aryl group in which two or more rings are condensed (the number of carbon atoms constituting the rings of the aryl group is 10 or more) or the like.