ChDT Derivative Organic Photoelectric Conversion Layer
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Solution Overview
Problem
Current photoelectric conversion elements using organic semiconductor materials face challenges in improving electric characteristics such as charge transporting performance without compromising spectral characteristics.
Innovation Solution
Incorporating Chryseno[1,2-b:8,7-b′]dithiophene (ChDT1) or Chryseno[1,2-b:7,8-b′]dithiophene (ChDT2) derivatives as the organic photoelectric conversion layer in a solid-state imaging device, which enhances charge transporting performance without affecting spectral characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic photoelectric conversion materials are used, then spectral characteristics are maintained, but charge transporting performance is insufficient
Solution Approach 1:
The patent changes the chemical structure parameters of the organic photoelectric conversion material by introducing specific ChDT1 or ChDT2 derivative structures with particular molecular configurations. This structural parameter change improves charge transporting performance while maintaining the spectral characteristics through careful selection of molecular weight, conjugation length, and functional groups.
Solution Approach 2:
The patent employs composite material strategy by combining ChDT1 or ChDT2 derivatives with other organic materials to form a photoelectric conversion layer. This composite approach allows the material to simultaneously achieve high charge transporting performance from the ChDT derivative and desired spectral characteristics from the combination of materials.
2Reliability
If new organic materials are introduced to improve electric characteristics, then charge transport performance increases, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality principle by introducing specific functional groups and molecular structures only in the photoelectric conversion layer where they are most needed. The ChDT1 or ChDT2 derivatives are localized in the organic photoelectric conversion layer to improve charge transport, while other layers maintain their original structures, thus improving electric characteristics without unnecessarily complicating the overall manufacturing process.
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 ChDT1 or ChDT2 derivatives improves the external quantum efficiency, responsiveness, and reduces dark current characteristics in the photoelectric conversion element, thereby enhancing the overall electric characteristics of the solid-state imaging device.
Implementation Method 1
an organic photoelectric conversion layer provided between the first electrode and the second electrode and including at least one of a Chryseno[1,2-b:8,7-b′]dithiophene (ChDT1) derivative... This makes it possible to improve transporting performance of charges generated by photoelectric conversion
Data Source
AI summary
A photoelectric conversion element of the present disclosure includes a first electrode, a second electrode disposed to be opposed to the first electrode, and an organic photoelectric conversion layer provided between the first electrode and the second electrode and including at least one of a Chryseno[1,2-b:8,7-b′]dithiophene (ChDT1) derivative represented by the general formula (1) or a Chryseno[1,2-b:7,8-b′]dithiophene (ChDT2) derivative represented by the general formula (2).