Block Polymer with Sterically Separated Charge Transport Blocks
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Solution Overview
Problem
Existing organic electronic devices, particularly those using conjugated polymers, face challenges in achieving efficient electron and hole transport due to interfaces between functional layers, which hinders their practical application in devices like light-emitting devices and transistors.
Innovation Solution
A block polymer with a carbon backbone is developed, featuring electron-transporting and hole-transporting blocks that are sterically separated, eliminating interfaces and enhancing charge transport efficiency, along with a luminescent block for improved light-emitting properties, and incorporating insulating functional groups for controlled electron and hole transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple functional layers are stacked to create organic electronic devices, then device functionality is improved, but interface problems arise that hinder electron and hole injection
Solution Approach 1:
The patent combines multiple functional layers (electron-transporting layer, hole-transporting layer, and luminescent layer) into a single block copolymer structure. The block copolymer contains distinct blocks with different functions that are covalently bonded, eliminating the need for separate layers and their interfaces, thereby solving the charge injection problem while maintaining device functionality
Solution Approach 2:
The invention creates a composite material at the molecular level by synthesizing a block copolymer that integrates multiple functional components (electron-transporting units, hole-transporting units, and luminescent units) into a single polymer chain. This composite structure allows different functional blocks to work together without interface barriers
2Reliability
If substituted polyacetylene is used as a molecular electronic material, then conductivity is achieved, but practical application performance is insufficient
Solution Approach 1:
The patent applies local quality by assigning different functional characteristics to different blocks within the copolymer. Each block is designed with specific properties (electron-transporting, hole-transporting, or luminescent) to optimize local functions while maintaining overall device performance, going beyond the uniform structure of substituted polyacetylene
Solution Approach 2:
The invention segments the polymer chain into distinct functional blocks, each responsible for a specific function. This segmentation allows optimization of each block's properties independently while maintaining overall conductivity and practical performance through the cooperative action of all blocks
Data Source
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AI summary
The invention provides a novel block polymer applicable to a light-emitting device. The block polymer has an electron-transporting block and a hole-transporting block, wherein the main chain backbone of the block polymer is polyacetylene.