Furan Crosslinkable Polymer for Multilayer OLED Fabrication
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Solution Overview
Problem
Commercial polymer optoelectronic materials face issues with interface miscibility and corrosion when using solution processing methods for preparing complex polymer light-emitting diodes, leading to inefficiencies in multilayer device fabrication.
Innovation Solution
A conjugated polymer with a furanyl crosslinkable group is developed, which forms an insoluble and infusible three-dimensional interpenetrating network film upon acid initiation and heating, providing excellent solvent resistance and enabling efficient multilayer organic electronic device fabrication through solution processing techniques like inkjet printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If solution processing method is used to prepare multilayer polymer light-emitting diode, then manufacturing cost is reduced and large-area fabrication is enabled, but interface miscibility and interface corrosion problems occur
Solution Approach 1:
The patent introduces a furanyl crosslinkable group into the polymer structure, which undergoes crosslinking reactions to fundamentally change the physical and chemical parameters of the polymer. This crosslinking transforms the polymer from a soluble state to an insoluble and infusible network structure, thereby preventing interface miscibility and corrosion while maintaining solution processing advantages
Solution Approach 2:
The patent creates a composite structure by combining the furanyl crosslinkable group with the conjugated polymer backbone. This composite material approach integrates the solubility benefits of conventional polymers during processing with the crosslinking capabilities to prevent interface issues, achieving both low-cost manufacturing and high device reliability
2Area of stationary object
If solution processing method is used to prepare multilayer polymer light-emitting diode, then large-area flexible devices can be prepared, but interface corrosion occurs due to solvent dissolving underlying layers
Solution Approach 1:
The furanyl crosslinkable group undergoes crosslinking to transform the polymer's solubility parameters, creating an insoluble network that resists solvent attack. This parameter change prevents the harmful effect of interface corrosion while preserving the ability to process large-area devices using solution methods
Solution Approach 2:
The crosslinking reaction is designed to occur before or during the deposition of subsequent layers, creating a protective barrier in advance that prevents solvent from dissolving underlying layers. This preliminary anti-action eliminates interface corrosion before it can occur during multilayer fabrication
3Ease of operation
If conventional polymer materials are used, then good solubility in common solvents is achieved, but interface miscibility and solvent resistance problems occur in multilayer devices
Solution Approach 1:
The patent introduces the furanyl crosslinkable group to change the solubility parameters of the polymer. The polymer maintains good solubility in common solvents for easy processing, but upon crosslinking, transforms to an insoluble state that provides excellent solvent resistance, resolving the contradiction between ease of operation and reliability
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 enhances light-emitting intensity and efficiency in organic electronic devices by preventing interface miscibility and corrosion, facilitating the production of complex multilayer structures with improved solvent resistance.
Implementation Method 1
the furanyl crosslinkable group of the above polymer also has a crosslinkable function. Under acid initiation and heating condition, the above-mentioned polymer will produce a chemical reaction to form an insoluble and infusible three-dimensional interpenetrating network polymer film
Implementation Method 2
the conjugated backbone structure of the above polymer imparts rich optical properties such as photoluminescence, electroluminescence, photovoltaic effects and the like
Implementation Method 3
the conjugated backbone structure of the above polymer imparts rich optical properties such as photoluminescence, electroluminescence, photovoltaic effects and the like
Data Source
Figure 1~2
Figure 3
AI summary
The present disclosure provides a polymer containing a furanyl crosslinkable group and the use thereof in an organic electronic device. A polymer containing a furanyl crosslinkable group is represented by the following general formula (I): wherein x and y each represent a repeating unit, and both x and y are positive integers; formula and formula are each independently selected from the group consisting of an aryl containing 5 - 40 ring atoms and a heteroaryl containing 5-40 ring atoms; formula is a linking group, and formula is selected from the group consisting of alkyl, alkoxy, amino, alkenyl, alkynyl, aralkyl, and heteroalkyl; and R2, R3 and R4 are each independently selected from the group consisting of H, D, F, CN, alkyl, fluoroalkyl, aryl, heteroaryl, amino, Si, germyl, alkoxy, aryloxy, fluoroalkoxy, siloxane, siloxy, deuterated alkyl, deuterated fluoroalkyl, deuterated aryl, deuterated heteroaryl, deuterated amino, deuterated silyl, deuterated germyl, deuterated alkoxy, deuterated aryloxy, deuterated fluoroalkoxy, deuterated siloxane, and deuterated siloxy.