Infrared Absorbing Polymer with Composite Structural Units
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Solution Overview
Problem
Current polymers with small energy bandgaps have low absorption characteristics in the infrared region, limiting their efficiency in photoelectric devices and sensors.
Innovation Solution
An infrared absorbing polymer is developed, comprising a first structural unit and a second structural unit, which provides strong charge transfer characteristics and small energy bandgap, enabling effective absorption of light in the near-infrared/infrared wavelength range (750 nm to 3000 nm) and improved photoelectric conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If polymers with small energy bandgaps are used, then photoelectric conversion efficiency is improved, but infrared absorption characteristics deteriorate
Solution Approach 1:
The patent employs composite materials by combining multiple structural units within the polymer chain: a first structural unit with strong charge transfer characteristics and small energy bandgap, and a second structural unit with specific chemical groups (carboxyl, hydroxyl, amino, or carbonyl groups) that enhance infrared absorption. This composite approach allows simultaneous achievement of both photoelectric conversion efficiency and infrared absorption characteristics.
Solution Approach 2:
The patent modifies molecular parameters by carefully selecting and adjusting the chemical groups in the second structural unit. By varying the types of functional groups (carboxyl, hydroxyl, amino, carbonyl) and their concentrations within the polymer structure, the material's optical properties are optimized to achieve both small energy bandgap for high photoelectric efficiency and strong infrared absorption for improved reliability.
2Ease of manufacture
If conventional polymer structures are used, then manufacturing simplicity is maintained, but infrared absorption performance deteriorates
Solution Approach 1:
The patent segments the polymer structure into distinct functional units: a first structural unit providing the basic polymer framework and charge transfer properties, and a second structural unit containing specific infrared-absorbing functional groups. This segmentation allows each unit to be optimized independently while maintaining overall manufacturability through standard polymer synthesis techniques.
Solution Approach 2:
The patent applies local quality by introducing specific functional groups (carboxyl, hydroxyl, amino, carbonyl) at particular locations within the polymer chain. These localized functional groups provide enhanced infrared absorption without requiring complex overall polymer structure, thus maintaining manufacturing simplicity while improving infrared absorption performance.
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 polymer exhibits enhanced light absorption and photoelectric conversion characteristics in the infrared region, reducing manufacturing costs through a solution-based thin-film formation process.
Implementation Method 1
the infrared absorbing polymer includes a first structural unit represented by Chemical Formula 1 and a second structural unit including at least one of Chemical Formula 2A to Chemical Formula 2I... which provides strong charge transfer characteristics and small energy bandgap, enabling effective absorption of light in the near-infrared/infrared wavelength range
Data Source
AI summary
An infrared absorbing polymer includes a first structural unit represented by Chemical Formula 1 and a second structural unit including at least one of Chemical Formula 2A to Chemical Formula 2. The infrared absorbing polymer may be included in an infrared absorbing/blocking film, a photoelectric device, a sensor, and an electronic device.