Condensed Cyclic Compound for Organic Light-Receiving Devices
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Solution Overview
Problem
Current organic light-receiving devices face challenges in achieving high sensitivity, efficiency, and long lifespan due to limitations in light absorption and electron-hole pair separation at the interface.
Innovation Solution
A condensed cyclic compound is introduced, comprising specific repeating units with π electron-rich groups, which are incorporated into the light-receiving device to enhance light absorption and electron transport, thereby improving sensitivity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic semiconductor materials are used in light-receiving devices, then the device structure can be maintained with standard materials, but the sensitivity, efficiency, and lifespan of the device are limited
Solution Approach 1:
The patent modifies the chemical structure of organic semiconductor materials by introducing specific repeating units with electron-donating groups (Formula 1-1 and 1-2) and electron-accepting groups (Formula 2-1 and 2-2). These structural parameter changes optimize the HOMO and LUMO energy levels, improving both charge generation efficiency and material stability, thereby simultaneously enhancing sensitivity and lifespan
Solution Approach 2:
The patent employs composite organic semiconductor materials combining electron-donating and electron-accepting units within the same molecular structure. This composite approach creates materials with balanced charge transport properties and enhanced stability, resolving the contradiction between sensitivity and lifespan by achieving both high quantum efficiency and improved device durability
2Productivity
If conventional organic semiconductor materials are used, then material synthesis can follow standard procedures, but light absorption capability and electron-hole pair separation efficiency are insufficient
Solution Approach 1:
The patent divides the organic semiconductor molecule into distinct functional segments: electron-donating repeating units (Formula 1-1 and 1-2) and electron-accepting repeating units (Formula 2-1 and 2-2). This segmentation allows each unit to perform its specific function optimally, enhancing overall efficiency while maintaining a systematic approach to molecular design that doesn't excessively complicate synthesis
Solution Approach 2:
The patent designs repeating units with multiple functions: the electron-donating units provide both optical absorption and hole transport capabilities, while electron-accepting units provide electron transport and contribute to light absorption. This multi-functionality improves efficiency without requiring separate materials for each function, thus avoiding excessive complexity
3Measurement precision
If standard organic semiconductor materials are used, then the device can be manufactured with conventional processes, but the external quantum efficiency and light absorption are limited
Solution Approach 1:
The patent optimizes the HOMO and LUMO energy level parameters of the organic semiconductor by carefully selecting substituents and core structures in the repeating units. This parameter optimization enhances external quantum efficiency by improving charge separation and reducing recombination, while the modular repeating unit structure maintains compatibility with conventional solution processing and vacuum deposition methods
Solution Approach 2:
The patent introduces specific functional groups at localized positions within the molecular structure (electron-donating groups in Formula 1-1 and 1-2, electron-accepting groups in Formula 2-1 and 2-2). This local modification approach allows precise control over energy levels and charge transport properties, improving quantum efficiency without requiring complete redesign of the entire molecular structure, thus maintaining ease of manufacture
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 use of the condensed cyclic compound leads to a light-receiving device with increased sensitivity, efficiency, and extended lifespan by optimizing light absorption and electron-hole pair separation, resulting in improved external quantum efficiency and reduced degradation.
Implementation Method 1
When light is irradiated to the organic light-receiving device, electrons may be excited and holes may be generated due to absorption of the light
Implementation Method 2
The excitons move to an interface of the interlayer and are separated into electrons and holes again according to characteristics of the interface
Data Source
AI summary
A condensed cyclic compound includes at least one first repeating unit represented by Formula 1-1 and/or Formula 1-2 and at least one second repeating unit represented by Formula 2-1 and/or Formula 2-2. A light-receiving device includes the condensed cyclic compound in a light-receiving layer of the light-receiving device, and an electronic apparatus and an electronic device include the light-receiving device.