Quinoid Thiophene Material for Solar Cell Efficiency
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Solution Overview
Problem
Current commercial solar cells, primarily based on silicon and inorganic materials, are expensive and limited in scope due to high production costs and environmental concerns, while organic solar cells face lower photoelectric conversion efficiency, necessitating the development of more efficient and cost-effective organic photoelectric materials.
Innovation Solution
A quinoid thiophene organic photoelectric material with a wide spectral response and good thermal and environmental stability is developed, utilizing a simple synthesis method involving Stille coupling and bromide substitution reactions, incorporating strong electron-withdrawing groups to enhance absorption in the red and near-infrared regions, suitable for use in solar cells, field-effect transistors, and electroluminescent devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicon and inorganic solar cells are used, then photoelectric conversion efficiency is improved, but manufacturing cost increases and environmental pollution occurs
Solution Approach 1:
The patent changes the chemical composition parameters by introducing quinoid thiophene structures with specific electron-withdrawing groups (cyano vinyl groups) and adjusting molecular weight through varying m and n values (1-20), achieving high photoelectric conversion efficiency while maintaining low manufacturing cost through organic material synthesis
Solution Approach 2:
The patent creates composite organic photoelectric materials by combining quinoid thiophene backbones with electron-withdrawing cyano vinyl groups and adjustable alkyl/alkoxy substituents, achieving both high efficiency and cost-effectiveness through molecular design rather than using expensive inorganic silicon materials
2Ease of manufacture
If organic solar cell materials are used, then manufacturing cost is reduced and environmental protection is improved, but photoelectric conversion efficiency decreases
Solution Approach 1:
The patent achieves high photoelectric conversion efficiency in organic materials by optimizing molecular parameters: introducing strong electron-withdrawing cyano vinyl groups, adjusting molecular weight through m and n values, and selecting appropriate substituents (R1-R6), thereby reaching efficiency levels comparable to inorganic cells while maintaining organic material advantages
Solution Approach 2:
The patent applies local quality enhancement by strategically placing strong electron-withdrawing cyano vinyl groups at specific positions on the quinoid thiophene backbone, creating localized electron-deficient regions that improve charge separation and transport, thereby enhancing photoelectric conversion efficiency without compromising the overall organic material structure
3Reliability
If spectral response range is expanded to red and near infrared regions, then photoelectric conversion efficiency is improved, but material structure complexity increases
Solution Approach 1:
The patent achieves red and near-infrared absorption by changing the HOMO-LUMO energy gap parameters through molecular design: extending conjugation length by increasing m and n values, introducing electron-withdrawing cyano vinyl groups, and adjusting substituent types, thereby expanding spectral response while maintaining relatively simple quinoid thiophene backbone structure
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 quinoid thiophene organic photoelectric material improves optical and electrical properties, increases photoelectric conversion efficiency, and simplifies the manufacturing process, making it suitable for large-scale production and diverse applications in optoelectronic devices.
Implementation Method 1
the quinoid thiophene organic photoelectric material described above has strong electron withdrawing groups cyano vinyl (═C(CN)2) at both ends of the molecular chain, that make it become quinoid thiophene containing dithiophene and thiophene unit, further widening the range of the material on the absorption of the solar spectrum, for example, push the absorption band edge of material to the red and near infrared region
Implementation Method 2
Solar cells transform solar energy into electricity directly, and it is an effective method of using solar energy practical
Data Source
AI summary
Quinoid thiophene organic photoelectric material with formula (1), method for its preparation and application thereof are provided, wherein R1, R2, R3, R4, R5 and R6, which are identical or different, represent H, C1˜C30 alkyl or alkoxy, m and n, which are identical or different, represent integers between 1 and 20. The quinoid thiophene organic photoelectric material with formula (1) has wide spectral response, good thermal stability and environmental stability.