Infrared Absorbing Compound for Photoelectric Sensitivity
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Solution Overview
Problem
Current imaging devices face challenges in effectively absorbing infrared light, particularly in the near-infrared to infrared wavelength range, which limits their sensitivity and performance in low-illumination environments and biometric applications.
Innovation Solution
A compound represented by Chemical Formula 1, with specific functional groups and aromatic ring structures, is used in photoelectric devices and infrared absorbers to enhance infrared absorption, achieving improved sensitivity and light absorption characteristics across the 750 nm to 3000 nm wavelength range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional imaging devices are used, then they can capture images in normal lighting conditions, but they fail to effectively absorb infrared light and achieve adequate sensitivity in low-illumination environments
Solution Approach 1:
The patent modifies the molecular structure of the imaging compound by introducing specific functional groups (benzoindole, squaraine, croconaine) and adjusting conjugation length to shift the absorption spectrum into the infrared region (750-3000 nm), thereby changing the optical parameters to achieve infrared sensitivity
Solution Approach 2:
The patent employs composite molecular structures combining electron-donating benzoindole units with electron-accepting squaraine or croconaine cores, creating a donor-acceptor-donor (D-A-D) system that achieves enhanced infrared absorption through synergistic interactions between different functional moieties
2Measurement precision
If the conjugation length is increased to extend absorption to infrared wavelengths, then infrared absorption capability is improved, but the device complexity and material synthesis difficulty increase
Solution Approach 1:
The patent introduces specific functional groups (benzoindole, squaraine, croconaine) at particular positions within the molecular structure to locally enhance electron donation or acceptance, thereby extending absorption to infrared wavelengths without requiring uniform increases in overall molecular size
Solution Approach 2:
The patent divides the molecular structure into distinct functional segments (electron-donating benzoindole units, electron-accepting squaraine/croconaine cores, connecting linkers) that can be independently optimized and combined, simplifying the design process while achieving complex infrared absorption properties
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 photoelectric conversion efficiency and charge transfer characteristics, enabling enhanced infrared light absorption and sensitivity, particularly in the near-infrared to infrared range, thus improving the performance of imaging devices in low-illumination conditions and biometric applications.
Implementation Method 1
a compound having improved infrared absorption properties... photoelectric conversion efficiency... infrared light absorption
Data Source
AI summary
A compound is represented by Chemical Formula 1.In Chemical Formula 1, R1 to R4, R11a to R14c, and n are the same as defined in the detailed description.