Organic Device Electrode Occupancy for Light Transmittance
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Solution Overview
Problem
As the area of each cathode in an organic device increases, the electrical resistance decreases, but this also leads to a decrease in light transmittance, creating a trade-off between electrical performance and optical transmission.
Innovation Solution
The organic device incorporates a second electrode with varying occupancy areas and transmission areas, where the second electrode is disposed at different occupancies in different display areas, allowing for optimized light transmittance while maintaining electrical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the area of each cathode is increased, then the electrical resistance decreases, but the transmittance of light decreases
Solution Approach 1:
The second electrode is configured with different occupancy rates in different display areas: a first occupancy rate in the first display area and a second occupancy rate in the second display area, where the second occupancy rate is lower than the first. This local differentiation allows the electrode to provide sufficient electrical conductivity where needed while maximizing light transmittance in other areas, thereby resolving the contradiction between electrical resistance and light transmittance.
2Reliability
If the occupancy of the second electrode is increased, then the electrical performance improves, but the light transmittance decreases
Solution Approach 1:
The patent implements spatially varying electrode occupancy where the second electrode occupies a larger area in the first display area (higher occupancy rate) to ensure electrical performance, while occupying a smaller area in the second display area (lower occupancy rate) to maximize light transmittance. This localized optimization resolves the contradiction between electrical performance and light transmittance.
3Reliability
If the area of the second electrode is increased, then the electrical conductivity increases, but the transmission area for light decreases
Solution Approach 1:
The second electrode is designed with non-uniform distribution: in the first display area it has a first occupancy rate that provides sufficient electrical conductivity, while in the second display area it has a second occupancy rate that is lower, thereby preserving transmission area for light. This local differentiation resolves the contradiction between electrical conductivity and transmission area.
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 effectively increases the transmittance of light in the organic device, enhancing its optical performance without compromising electrical resistance.
Implementation Method 1
an organic layer is formed on each of the anodes by depositing an organic material on the anode via a corresponding one of the through-holes of a mask
Data Source
AI summary
An organic device may include a substrate, first electrodes disposed on the substrate, organic layers respectively disposed on the first electrodes, and a second electrode disposed on the organic layers. When the organic device is viewed in a direction normal to the substrate, the organic device may include a first display area that includes the second electrode at a first occupancy, and a second display area that includes the second electrode at a second occupancy lower than the first occupancy. The second display area may include the second electrode, and transmission areas each surrounded by the second electrode in plan view. The transmission areas may include a first transmission area, and a second transmission area adjacent to the first transmission area via the second electrode. The first transmission area may have a first shape, and the second transmission area may have a second shape different from the first shape.