OLED Auxiliary Layer for Heterogeneous Doped Interface
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Solution Overview
Problem
Current semiconductor fabrication processes for blue light OLEDs result in inefficient interfaces between doped layers, leading to decreased performance, shorter lifespan, and higher operating voltage in full-color Organic Light-Emitting Diode (OLED) displays.
Innovation Solution
Incorporating an auxiliary layer with electron mobility greater than 1×10−4 m2/V*s, fabricated using the same process as the second doped layer, between the first and second doped layers to improve the performance of the organic light emitting device, specifically between the blue light common layer and the organic light emitting layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an interface between doped layers is formed with different process modes, then fabrication flexibility is improved, but interface quality deteriorates causing efficiency decrease
Solution Approach 1:
The patent introduces an auxiliary layer as an intermediary component between the first doped layer (fabricated by solution process) and the second doped layer (fabricated by vacuum process). This auxiliary layer acts as a buffer that mediates the interface between two different fabrication processes, improving electron transport across the heterogeneous interface while maintaining the benefits of both solution and vacuum fabrication methods.
2Device complexity
If no auxiliary layer is added between doped layers, then device complexity is reduced, but electron transport efficiency deteriorates
Solution Approach 1:
The auxiliary layer serves as a mediator that facilitates electron transport between the first and second doped layers. By introducing this intermediate layer with specific material properties (electron mobility > 1×10^-4 m²/Vs), the patent improves electron transport efficiency without requiring complex multi-step fabrication processes.
Solution Approach 2:
The patent specifies particular parameters for the auxiliary layer including electron mobility greater than 1×10^-4 m²/Vs and thickness between 1-5 nm. By controlling these physical parameters, the auxiliary layer optimizes electron transport efficiency while maintaining simple fabrication compatibility with existing solution and vacuum processes.
3Ease of manufacture
If conventional doped layer interface is used, then manufacturing process is simplified, but operating voltage increases and lifespan decreases
Solution Approach 1:
The auxiliary layer acts as a protective intermediary that improves the heterogeneous interface between solution-process and vacuum-process doped layers. This intermediary structure reduces interface defects and improves electron transport, thereby extending device lifespan and reducing operating voltage while maintaining compatibility with conventional manufacturing processes.
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 enhances the efficiency and extends the lifespan of OLEDs by reducing operating voltage and improving current and power efficiency while maintaining the same brightness and color characteristics.
Implementation Method 1
the auxiliary layer has an electron mobility more than 1×10−4 m2/V*s
Implementation Method 2
Organic light emitting device including a first electrode, a second electrode, and an organic functional layer
Data Source
AI summary
The embodiments of the present disclosure provide an organic light emitting device including a first electrode, a second electrode, and an organic functional layer, wherein the organic functional layer includes a first doped layer fabricated in a first process, a second doped layer fabricated in a second process, and an auxiliary layer formed between the first doped layer and the second doped layer, wherein the auxiliary layer is used to improve the performance of the first doped layer. The embodiments of the present disclosure further provide a method for fabricating the organic light emitting device. The embodiments of the present disclosure also provide a display apparatus including the organic light emitting device.