Stacked Organic Photoelectric Conversion Device with Protective Films
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing organic photoelectric conversion devices face challenges in measuring light by different wavelength bands while being vulnerable to air gases and require complex manufacturing processes.
Innovation Solution
The device consists of stacked first and second organic photoelectric conversion elements with distinct wavelength sensitivity bands, protected by films, allowing for simultaneous measurement of different wavelength bands without optical axis adjustment and simplifying manufacturing by using protective films to shield from air gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If organic photoelectric conversion units with different wavelength sensitivity are used to measure light by dividing wavelength bands, then measurement capability across multiple wavelength bands is improved, but vulnerability to air gases (oxygen and water vapor) increases requiring complex protection measures
Solution Approach 1:
The device is divided into multiple independent photoelectric conversion elements, each sensitive to different wavelength bands. Each element is individually protected by its own protective film, allowing separate optimization of protection for each element without affecting others. This segmentation enables multi-wavelength measurement while providing targeted protection against air gases for each vulnerable component.
Solution Approach 2:
Protective films are introduced as intermediary layers between the organic photoelectric conversion units and the harmful air gases. These films act as barriers that prevent oxygen and water vapor from reaching the sensitive organic materials, thereby protecting the photoelectric conversion units while allowing light transmission for measurement functionality.
2Reliability
If multiple protective measures are implemented to protect organic photoelectric conversion units from air gases, then environmental resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The protective films are integrated directly into the manufacturing process of the photoelectric conversion elements themselves, rather than being added as separate post-processing steps. The protective film formation is combined with the existing vacuum deposition processes used for creating the photoelectric conversion layers, thereby providing protection without significantly increasing manufacturing complexity.
Solution Approach 2:
The protective films are designed with specific optical parameters (transparency in measurement wavelength bands) and barrier parameters (resistance to oxygen and water vapor penetration). By optimizing these parameters, the films provide effective protection while maintaining the optical performance needed for light measurement, avoiding the need for overly complex multi-layer protection structures.
3Measurement precision
If stacked structure with multiple photoelectric conversion elements is used for wavelength division measurement, then measurement precision is improved, but optical axis alignment requirements increase manufacturing difficulty
Solution Approach 1:
The stacked device is designed with each photoelectric conversion element independently structured on its own substrate with its own protective film. This segmentation allows each element to be manufactured and optimized separately, then stacked without requiring precise optical axis alignment between elements, as each element processes a specific wavelength band independently.
Solution Approach 2:
The solution transitions from requiring precise lateral (2D) optical axis alignment to utilizing the vertical (3D) stacking dimension. By assigning different wavelength bands to different vertical layers rather than requiring precise horizontal alignment of multiple elements, the manufacturing complexity is significantly reduced while maintaining measurement precision through wavelength-specific sensitivity of each layer.
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 solution enables reliable measurement of light across multiple wavelength bands while protecting the device from air gases, simplifying the manufacturing process and enhancing environmental resistance.
Implementation Method 1
first and second organic photoelectric conversion elements which convert light into electrical energy
Implementation Method 2
a first protective film that covers the first element main body... and a second protective film that covers the second element main body... the organic photoelectric conversion units can be protected from gases such as the air
Data Source
AI summary
An organic photoelectric conversion device includes first and second organic photoelectric conversion elements which convert light into electrical energy. The first and second organic photoelectric conversion elements are disposed to be stacked in this order along an incident direction of the light. The first organic photoelectric conversion element includes a first element main body including a first substrate, first and second transparent electrodes, and an organic photoelectric conversion unit having sensitivity in a first wavelength band of the light, and a first protective film that covers the first element main body. The second organic photoelectric conversion element includes a second element main body including a second substrate, a third transparent electrode, an electrode, and an organic photoelectric conversion unit having sensitivity in a second wavelength band of the light, and a second protective film that covers the second element main body.