Organic Photoelectric Compound for High-Sensitivity Display Sensors
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Solution Overview
Problem
Conventional silicon photodiodes in biometric recognition sensors have limited sensitivity due to small pixel size and reduced absorption area, necessitating the development of alternative materials that can enhance light absorption and integration with display panels.
Innovation Solution
A compound with a molecular packing density of greater than or equal to 1.55 molecules/nm3, represented by Chemical Formulas 1 to 3, is used in a photoelectric device to selectively absorb light in the visible light region, improving light absorption characteristics and integration with display panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicon photodiode is used in sensor, then device structure is well-established and manufacturing is feasible, but sensitivity deteriorates due to small absorption area from small pixel size
Solution Approach 1:
The patent changes the material parameter from silicon to organic compound, which fundamentally alters the absorption characteristics. The organic compound achieves higher absorption coefficient and extended spectral response range, directly improving sensitivity without being constrained by pixel size limitations of silicon photodiodes
Solution Approach 2:
The patent employs composite material strategy by combining organic light-absorbing compounds with existing photodiode structures. This integration allows the organic material to enhance light absorption in the active layer while maintaining the established silicon-based device architecture, thus improving sensitivity without compromising structural reliability
2Measurement precision
If organic material is used to replace silicon photodiode, then light absorption and sensitivity improve, but device complexity increases
Solution Approach 1:
The patent applies local quality principle by introducing organic compounds specifically in the light-absorbing active layer of the photodiode, while maintaining the established silicon-based device structure in other regions. This localized material substitution improves sensitivity without requiring complete redesign of the entire device
Solution Approach 2:
The patent merges organic light-absorbing materials with conventional photodiode structures, combining the advantages of both approaches. The organic material provides superior light absorption while the silicon-based structure provides established manufacturing processes and device reliability, achieving improved sensitivity without excessive complexity
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 enhanced light absorption and improved photoelectric conversion efficiency, reducing power consumption and increasing sensitivity in biometric recognition sensors embedded within display panels.
Implementation Method 1
The photoelectric device used in the sensor as described above is a device that converts light into an electrical signal using the photoelectric effect
Data Source
AI summary
Provided is a compound represented by any one of Chemical Formulas 1 to 3, and having a molecular packing density of greater than or equal to about 1.55 molecules/nm3 and photoelectric devices, light absorption sensors, sensor-embedded display panels, and electronic devices including the same.In Chemical Formulas 1 to 3, the definition of each substituent is as described in the specification.