BODIPY Organic Imaging Element for High Color Selectivity
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Solution Overview
Problem
Current imaging elements with organic materials have insufficient spectral characteristics, particularly in terms of wavelength selectivity, which limits their ability to accurately detect and distinguish between different color signals without the use of color filters.
Innovation Solution
The development of an imaging element with a photoelectric conversion layer formed using a specific BODIPY compound, represented by a general formula, which includes hydrogen atoms at specific positions, enhancing the selectivity for a desired wavelength band by forming a bulk heterojunction structure with p-type and n-type semiconductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional organic materials are used in imaging elements, then the device can be manufactured with current technology, but the spectral characteristics and wavelength selectivity are insufficient
Solution Approach 1:
The patent modifies the molecular structure of BODIPY compounds by changing parameters such as substituting hydrogen atoms with deuterium atoms at specific positions (R1 and R4), and introducing various functional groups (alkyl, cycloalkyl, alkoxy, aryl ether groups) at different positions. These parameter changes in the molecular structure directly improve the spectral characteristics and wavelength selectivity of the organic photoelectric conversion material, enabling high color selectivity without requiring color filters.
Solution Approach 2:
The patent creates composite photoelectric conversion layers by combining BODIPY compounds with p-type and n-type organic semiconductors to form a bulk heterojunction structure. This composite material approach enhances the spectral characteristics and wavelength selectivity by leveraging the complementary properties of different materials, achieving superior performance in detecting multiple color signals within a single pixel.
2Measurement precision
If color filters are used to improve wavelength selectivity, then spectral characteristics improve, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts and eliminates the need for color filters by incorporating wavelength-selective properties directly into the organic photoelectric conversion material itself. The BODIPY compound with specific molecular structure modifications inherently provides high color selectivity, allowing the imaging element to detect multiple color signals without requiring separate color filter components, thereby simplifying the overall device structure.
Solution Approach 2:
The patent makes the organic photoelectric conversion layer multi-functional by designing it to simultaneously perform photoelectric conversion and wavelength selection. The BODIPY compound structure is engineered to provide both the photoelectric conversion function and the spectral filtering function that would traditionally require separate color filters, reducing device complexity while maintaining or improving color selectivity.
3Ease of manufacture
If the organic layer uses standard BODIPY compounds, then manufacturing is straightforward, but spectral characteristics and wavelength selectivity remain limited
Solution Approach 1:
The patent maintains ease of manufacture by using BODIPY compounds that can be synthesized through established chemical methods, while improving spectral detection accuracy through specific parameter changes in the molecular structure. The modifications involve substituting atoms and adding functional groups at defined positions, which can be achieved through standard organic synthesis techniques, thus balancing manufacturing simplicity with enhanced spectral 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
This configuration allows for high color selectivity and improved spectral characteristics, enabling the imaging element to effectively detect multiple color signals within a single pixel without the need for color filters, thereby enhancing the imaging device's sensitivity and accuracy.
Implementation Method 1
an imaging element and an imaging device each of which makes it possible to increase spectral characteristics... This increases the selectivity for a wavelength detected by the organic layer
Data Source
AI summary
An imaging element according to an embodiment of the present disclosure includes: a first electrode; a second electrode that is disposed to be opposed to the first electrode; and an organic layer that is provided between the first electrode and the second electrode. The organic layer includes a compound represented by a general formula (1).