Organic Compound for Opto-Electronic Device Photoactive Layer
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Solution Overview
Problem
Current opto-electronic devices face challenges in achieving improved photoelectric characteristics, specifically high external quantum efficiency and reduced dark current density, which are essential for effective light detection and conversion.
Innovation Solution
Incorporating an organic compound represented by a specific formula into the opto-electronic device's photoactive layer, which includes a first electrode, a second electrode, and a photoactive layer, allowing for enhanced light absorption and separation of excitons into electrons and holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic compounds are used in the photoactive layer, then the device can perform basic light detection, but the external quantum efficiency is insufficient and dark current density is high
Solution Approach 1:
The patent modifies the molecular structure of organic compounds by changing parameters such as introducing specific heteroatoms (O, S, Se, Te) at defined positions, adjusting substituent groups (L1, L2, R1-R4, Z1-Z2), and controlling structural parameters (a1, a2, a3) to optimize light absorption and exciton separation, thereby improving external quantum efficiency while maintaining reliable photoelectric detection
Solution Approach 2:
The patent employs composite organic compounds combining multiple functional groups and structural motifs (Formula 1 compounds with specific heteroatoms and substituent patterns) to achieve synergistic effects that simultaneously improve light absorption, exciton separation, and reduce dark current, resulting in enhanced photoelectric characteristics
2Adaptability or versatility
If the photoactive layer uses standard organic materials, then device structure is simple, but light absorption in specific wavelength ranges is insufficient
Solution Approach 1:
The patent introduces specific heteroatoms (O, S, Se, Te) and functional groups at particular local positions within the organic compound structure (as defined in Formula 1) to create localized regions with enhanced light absorption properties for specific wavelength ranges, while maintaining overall structural organization and avoiding excessive complexity
3Reliability
If conventional photoactive materials are used, then manufacturing is straightforward, but dark current density is high causing noise
Solution Approach 1:
The patent designs organic compounds where the molecular structure (Formula 1 with specific heteroatoms and substituent patterns) inherently suppresses unwanted thermal and dark current generation while enhancing useful photoelectric conversion, effectively converting potential harmful effects into beneficial performance characteristics
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 organic compound enhances the device's ability to absorb light in a specific wavelength range, leading to improved photoelectric characteristics, increased efficiency, and reduced noise, making it suitable for applications like fingerprint recognition sensors.
Implementation Method 1
an opto-electronic device that detects incident light energy and converts the detected incident light energy into an electrical signal
Implementation Method 2
the organic compound has improved characteristics of absorbing light in a set or specific wavelength range
Data Source
AI summary
An opto-electronic device includes a first electrode, a second electrode facing the first electrode, a photoactive layer arranged between the first electrode and the second electrode, and an organic compound represented by Formula 1:wherein a maximum absorption wavelength of the organic compound is in a range of about 490 nm to about 570 nm, and an oscillator strength (OSC) of the organic compound is in a range of about 0.8 to about 1.0.