DPP Polymer Small Molecule Composite for OFET Charge Mobility
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Solution Overview
Problem
Existing organic semiconducting (OSC) materials face challenges in achieving high charge mobility, stability, and uniformity in electronic devices, particularly in organic field effect transistors (OFETs), due to limitations in molecular order and processability when incorporated with binders or used alone.
Innovation Solution
The use of specific diketopyrrolopyrrole (DPP) polymers in combination with DPP small molecules, where the DPP polymer is mixed with a compound of formula II, allowing for improved charge mobility and stability by optimizing the OSC layer's integrity and film uniformity, and enabling solution-processable electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If OSC material is diluted in organic binder to improve processability and stability, then film uniformity and device stability are improved, but charge mobility is reduced due to disruption of molecular order
Solution Approach 1:
The patent uses a composite material system consisting of DPP polymer (formula I) and DPP small molecule compound (formula II) combined in specific ratios. This composite OSC layer maintains high charge mobility while improving processability and film uniformity, resolving the contradiction between stability and charge mobility by creating a synergistic material combination rather than simple dilution
2Speed
If highly ordered crystalline layers of OSC compounds are used to achieve high charge mobility, then charge mobility is improved, but processability is reduced
Solution Approach 1:
The patent combines DPP polymer and DPP small molecule compound to create a composite OSC material that is solution-processable while maintaining high charge mobility. The specific combination allows the material to be deposited from solution (improving processability) while achieving charge mobility comparable to highly ordered crystalline layers through optimized molecular interactions in the composite structure
3Speed
If conventional OSC materials are used alone to maintain molecular order, then charge mobility is maintained, but film uniformity and device integrity are reduced
Solution Approach 1:
The patent creates a composite OSC layer using DPP polymer (formula I) and DPP small molecule compound (formula II) in specific weight ratios. This composite structure improves film uniformity and device integrity while maintaining high charge mobility, resolving the contradiction by using the synergistic combination of two materials rather than a single conventional OSC material
Data Source
AI summary
The present invention provides an electronic component or device comprising a gate electrode, a source electrode and a drain electrode, wherein said component or device further comprising an organic semiconducting (OSC) material that is provided between the source and drain electrode, wherein the OSC material comprises (a) a polymer represented by formula: (I), and (b) a compound of formula (II). High quality OFETs can be fabricated by the choice of a semiconductor material, which is comprised of a polymer represented by formula I and (b) a compound of formula II.