Donor-Acceptor Infrared Absorber Compound for Low-Light Sensor Sensitivity
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Solution Overview
Problem
Current infrared absorbers and photoelectric devices face challenges in achieving improved infrared light absorption characteristics, particularly in low-illumination environments, which affects their sensitivity and performance in capturing images and biometric applications.
Innovation Solution
A compound represented by Chemical Formula 1, with a donor-acceptor-donor structure and specific aromatic ring configurations, is used as an infrared absorber, enhancing charge transfer characteristics and light absorption in the infrared wavelength region, integrated into photoelectric devices and sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional infrared absorbers are used, then the device structure is simple, but the infrared light absorption characteristics are insufficient in low-illumination environments
Solution Approach 1:
The patent applies parameter changes by systematically modifying the molecular structure parameters of the infrared absorber. Specifically, it changes the aromatic ring types (Ar1, Ar2), substituent groups (R1-R4, Ra-Re), and linker structures (L1, L2) in Chemical Formula 1 to optimize infrared absorption characteristics. This allows tuning of the absorption spectrum and efficiency without fundamentally changing the device architecture.
Solution Approach 2:
The patent employs composite materials by creating a donor-acceptor-donor type compound that combines electron-donating aromatic rings with electron-accepting core structures. This composite molecular architecture enhances charge transfer characteristics and infrared light absorption efficiency, resolving the contradiction between absorption performance and structural simplicity.
2Power
If the infrared absorber structure is optimized for better absorption, then photoelectric conversion efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the complex infrared absorber molecule into modular components: electron-donating aromatic rings (Ar1, Ar2), electron-accepting core structures (X1-containing rings), and linker groups (L1, L2). This modular design allows independent optimization of each component and facilitates systematic synthesis through standardized coupling reactions, reducing overall manufacturing complexity while maintaining high photoelectric conversion efficiency.
3Reliability
If conventional absorbers are used, then manufacturing is easier, but sensor sensitivity in low-illumination conditions deteriorates
Solution Approach 1:
The patent systematically changes molecular parameters including aromatic ring types (C6-C30 arene, C3-C30 heteroarene), substituent positions and types (R1-R4, Ra-Re), and linker configurations (L1, L2) to optimize sensor sensitivity. These parameter adjustments enhance the compound's ability to absorb infrared light in low-illumination conditions, directly improving detection reliability without requiring fundamental device redesign.
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 compound significantly improves the infrared light absorption and photoelectric conversion efficiency, enhancing the sensitivity of sensors and devices in low-illumination conditions and expanding their application in imaging and biometric technologies.
Implementation Method 1
the compound significantly improves the infrared light absorption and photoelectric conversion efficiency
Implementation Method 2
enhancing charge transfer characteristics and light absorption in the infrared wavelength region
Implementation Method 3
A peak absorption wavelength of the infrared absorber may be in a wavelength region of about 750 nm to about 3000 nm
Data Source
AI summary
An infrared absorber includes a compound represented by Chemical FormulaIn Chemical Formula 1, Ar1, Ar2, X1, L1, L2, R1, R2, R3, and R4 are the same as defined in the detailed description.