Fluorene Copolymer Thienopyrazine Unit Solar Cell Efficiency
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Solution Overview
Problem
Current organic solar cells have lower photon-to-electron conversion efficiency compared to inorganic solar cells, and there is a need for low-cost, high-efficiency materials for solar cells that can be widely used.
Innovation Solution
A fluorene copolymer containing a thienopyrazine unit is developed, which has a wide spectrum response range and moderate band gap, formed through Suzuki polymerization, allowing for improved stability and efficiency in organic optoelectronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inorganic solar cells are used, then conversion efficiency is high, but cost is high and resources are limited
Solution Approach 1:
The patent changes the material parameters by developing organic copolymer solar cells with specific molecular structures (containing electron-donating and electron-accepting units) to achieve high conversion efficiency while maintaining low cost and ease of manufacturing
Solution Approach 2:
The patent uses composite organic materials combining electron-donating units and electron-accepting units in copolymer structures to achieve both high efficiency and low cost, resolving the contradiction between performance and manufacturing ease
2Ease of manufacture
If organic solar cells are used, then cost is low and material source is extensive, but conversion efficiency is low
Solution Approach 1:
The patent optimizes the molecular structure parameters of organic materials by designing copolymers with specific electron-donating and electron-accepting units, achieving high conversion efficiency while maintaining the cost advantages of organic materials
Solution Approach 2:
The patent introduces different functional units (electron-donating and electron-accepting) at specific positions in the copolymer chain to create local regions with optimized properties for charge separation and transport, thereby improving overall conversion efficiency
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 fluorene copolymer with thienopyrazine unit enhances the efficiency of photon-to-electron conversion and thermal stability, enabling the production of high-performance organic solar cells and other optoelectronic devices at a lower cost, suitable for large-scale manufacturing.
Implementation Method 1
efficiency of photon-to-electron conversion
Implementation Method 2
compounds A, B and C were carried out the Suzuki polymerization to produce the copolymer
Data Source
AI summary
A fluorene copolymer, method for preparation thereof, and use thereof are provided. Said fluorene copolymer comprises copolymer represented by formula (I), wherein R1-R2, R5-R8 are selected from H or C1-C20 alkyl, R3-R4 are selected from H, C1-C20 alkyl, C1-C20 alkoxyl, phenyl or phenoxyl, x+y=1, x≠0, y≠0; n is an integer of 1 to 200, Ar1 is thiophene unit-containing group. On account of thiophene unit and thienopyrazine unit, the fluorene copolymer has wide spectrum response range and favorable stability.