Integrated OLED Transistor Stacked Structure
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Solution Overview
Problem
Current semiconductor technologies require separate components for OLEDs and transistors, leading to increased material costs and complex manufacturing processes.
Innovation Solution
A stacked structure integrating a first electrode, a second electrode, an organic light-emitting layer, and a third electrode, which combines the functions of an OLED and a transistor in a single component, allowing for electrical connection and control of luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate components are used for OLED and transistor, then each component can be optimized independently, but material cost increases and manufacturing process becomes complex
Solution Approach 1:
The patent combines the OLED and transistor into a single integrated device where the organic light-emitting layer serves dual purposes: as the light-emitting medium and as the transistor channel. The electrodes are configured so that the first and second electrodes serve as both OLED electrodes and transistor source/drain electrodes, eliminating the need for separate component fabrication and reducing manufacturing complexity while maintaining component optimization through material selection.
Solution Approach 2:
The organic light-emitting layer performs multiple functions simultaneously: it acts as the emissive layer for light generation, the channel layer for transistor operation, and the dielectric layer for gate insulation. This multi-functionality reduces the total number of layers and materials needed, simplifying the manufacturing process while allowing independent optimization of the organic materials for both OLED and transistor performance.
2Reliability
If separate components are used for OLED and transistor, then each component can be optimized independently, but material cost increases
Solution Approach 1:
The patent merges the OLED and transistor into a single device structure, eliminating the need for separate materials for each component. The same organic layers serve multiple functions, reducing the total quantity of materials required and thereby reducing material cost while still allowing optimization of the organic materials for both functions.
Solution Approach 2:
The organic light-emitting layer is designed to perform multiple functions (light emission, charge transport, gate insulation), eliminating the need for separate functional layers and materials. This universality reduces material consumption and cost while maintaining the ability to optimize the organic materials for high-performance OLED and transistor operation.
3Device complexity
If integrated stacked structure is used, then material cost is reduced and manufacturing process is simplified, but device structure becomes complex
Solution Approach 1:
The integrated device is segmented into distinct functional regions within the stacked structure: the organic light-emitting layer is divided into segments that serve as transistor channel, dielectric, and electrode extensions. This segmentation allows the complex multi-functional device to be constructed from simpler, well-understood organic electronic components, reducing manufacturing complexity while managing structural complexity through modular design.
Solution Approach 2:
The patent employs a nested structure where the transistor components are embedded within the OLED structure. The gate electrode is positioned beneath the organic light-emitting layer, and the source/drain electrodes are integrated with the OLED electrodes. This nesting approach consolidates multiple functions into a compact stacked arrangement, simplifying the manufacturing process by reducing the number of separate fabrication steps while organizing the complex structure in a systematic hierarchy.
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 integration reduces material costs and simplifies the manufacturing process while enabling active control of luminance in display pixels and panels.
Implementation Method 1
The electrons and the holes respectively emitted from the electron transport layer (ETL) and the hole transport layer (HTL) are combined in the emitting material layer (EML). During the combining process of the electrons and the holes, extra energy is released in the form of optical waves when the electrons are excited to return the basic state.
Data Source
AI summary
In a semiconductor element, and a display pixel and a display panel using the same, the semiconductor element includes a first electrode, a second electrode, an organic light-emitting layer and a third electrode. The second electrode and the first electrode are disposed separately. The organic light-emitting layer is electrically connected with the first electrode and the second electrode. The third electrode is disposed above the organic light-emitting layer.