Organic Semiconductor Compound for Biometric Sensor Sensitivity
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Solution Overview
Problem
Current silicon photodiodes in biometric recognition sensors have limited sensitivity due to small absorption areas, prompting the need for alternative materials that can selectively absorb light in specific wavelength regions and maintain high photoelectric conversion efficiency, especially under high temperature conditions.
Innovation Solution
A compound represented by Chemical Formulas 1A or 1B, which acts as a p-type semiconductor, selectively absorbs light in the green wavelength region and is integrated into photoelectric devices and sensors, enhancing sensitivity and thermal stability, thereby improving the performance of biometric recognition systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If silicon photodiode is used in small pixel sensors, then resolution and integration are improved, but sensitivity deteriorates due to smaller absorption area
Solution Approach 1:
The patent changes the material parameter from silicon to organic compound (Chemical Formulas 1A or 1B), which has different optical properties including higher extinction coefficient and tunable absorption wavelength, allowing maintained or improved sensitivity despite smaller absorption area
Solution Approach 2:
The patent uses organic semiconductor compounds that can be integrated with silicon photodiodes in composite pixel structures, combining the advantages of both materials to achieve high sensitivity and resolution in miniaturized sensors
2Measurement precision
If organic material is used to replace silicon photodiode, then sensitivity and integration are improved, but thermal stability becomes a concern
Solution Approach 1:
The patent modifies the molecular structure of organic compounds by introducing rigid moieties and optimizing molecular weight and purity parameters to enhance thermal stability while maintaining high photoelectric conversion efficiency and extinction coefficient
Solution Approach 2:
The patent designs organic compounds with specific local structural features (Chemical Formulas 1A or 1B) that provide both high photoelectric conversion efficiency in the absorption region and thermal stability through rigid molecular frameworks and strong intermolecular interactions
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 achieves improved light absorption properties across the entire green wavelength range, maintaining high photoelectric conversion efficiency even under high temperature conditions, leading to enhanced sensitivity and stability in biometric recognition sensors and display panels.
Implementation Method 1
A photoelectric device that converts light into an electrical signal using the photoelectric effect
Implementation Method 2
the compound achieves improved light absorption properties across the entire green wavelength range
Data Source
AI summary
Provided are a compound represented by Chemical Formula 1A or 1B and a photoelectric device, a light absorption sensor, a sensor-embedded display panel, and an electronic device including the same.Details for Chemical Formulas 1A and 1B are as described in the detailed description.