Cross-linkable Charge Transport Materials for Organic Electronics
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Solution Overview
Problem
Existing organic electronic devices face challenges in maintaining the integrity of sequentially deposited layers, which is crucial for the effective functioning of these devices, as each layer must remain intact during the deposition of subsequent layers.
Innovation Solution
The development of novel charge transport materials and methods involving cross-linkable monomers and inorganic oxide particles, such as silica, alumina, or zirconia, which crosslink to form stable nanoparticles that can be used in hole transport layers, allowing for the formation of robust and intact layers in organic electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sequential deposition of layers from solution is used, then manufacturing cost and efficiency are improved, but layer integrity is compromised as each layer may deteriorate upon deposition of subsequent layers
Solution Approach 1:
The patent applies preliminary action by cross-linking the charge transport layer material before subsequent layer deposition. The monomeric or oligomeric charge transport materials are deposited from solution and then cross-linked in situ to form a stable, intact layer that can withstand subsequent processing steps without deterioration, enabling sequential deposition while maintaining layer integrity
Solution Approach 2:
The patent utilizes parameter changes by transitioning the charge transport material from a soluble monomeric or oligomeric state to an insoluble cross-linked network state. This chemical state change occurs after deposition but before subsequent layer processing, allowing the layer to maintain integrity during sequential deposition while enabling solution-based manufacturing
2Stability of the object's composition
If cross-linking is performed to maintain layer integrity, then layer stability is improved, but processing complexity increases due to additional cross-linking steps
Solution Approach 1:
The patent merges the deposition and cross-linking steps into an integrated process. The charge transport layer is deposited from solution containing monomeric or oligomeric materials, and cross-linking is performed in situ within the same processing sequence, combining what could be separate operations into a unified manufacturing flow that maintains simplicity while achieving layer stability
Solution Approach 2:
The patent uses cross-linking agents or catalysts as intermediaries that facilitate the transformation from soluble monomers/oligomers to insoluble cross-linked networks. These intermediaries enable the stability enhancement without requiring complex processing equipment or procedures, simply adding chemical mediators to the existing solution deposition process
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
This approach enables the creation of stable and efficient hole transport materials that can be dispersed in various solutions, facilitating the formation of intact layers in organic electronic devices, enhancing their performance and manufacturing efficiency.
Implementation Method 1
cross-linkable monomers and inorganic oxide particles, such as silica, alumina, or zirconia, which crosslink to form stable nanoparticles
Implementation Method 2
stable and efficient hole transport materials that can be dispersed in various solutions
Data Source
AI summary
Disclosed are compositions comprising:at least one monomer of the formula:where SiR′RR″ is SiCl3, Si(alkyl)Cl2, Si(alkyl)(O-alkyl)2, or Si(O-alkyl)3; n and y are each 0 or an integer from 1 to 10; andat least one particle comprising silica, alumina, zirconia, or mixtures thereof.