Organic Electric Element Charge-Generating Stack for OLED Lifespan
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Solution Overview
Problem
Existing organic electric elements used in portable display devices face challenges in achieving high luminous efficiency and long lifespan, particularly due to limitations in the organic materials used, which affect their light emission efficiency and driving voltage.
Innovation Solution
An organic electric element is designed with a specific layered structure comprising a first electrode, a second electrode, and an organic layer with a charge generating layer positioned between two stacks of emitting layers, utilizing specific compounds represented by chemical formulas to enhance charge distribution and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic materials are used in the organic electric element, then the device complexity is low, but the luminous efficiency and lifespan are insufficient
Solution Approach 1:
The organic layer is segmented into multiple functional stacks (first stack with first emitting layer, second stack with second emitting layer) separated by a charge generating layer. This segmentation allows each layer to be optimized for specific functions, improving overall device reliability and lifespan while managing complexity through modular design
Solution Approach 2:
The patent introduces a vertical stacking dimension with multiple emitting layers and charge generating layers arranged in sequence between electrodes. This multi-dimensional layered structure enables improved charge distribution and recombination pathways, enhancing luminous efficiency and device longevity without compromising structural manageability
2Use of energy by moving object
If conventional organic materials are used in the organic electric element, then the manufacturing process is simple, but the luminous efficiency is insufficient
Solution Approach 1:
The charge generating layer acts as an intermediary between the first and second emitting layers, facilitating efficient charge transfer and recombination. This intermediary structure improves luminous efficiency by ensuring optimal charge distribution across the organic layer while maintaining a manageable manufacturing process
Solution Approach 2:
The organic layer employs composite material architecture combining different emitting layer materials and charge generating layer materials with complementary properties. This composite structure enhances luminous efficiency through synergistic effects while the materials are selected to maintain compatibility with existing manufacturing processes
3Productivity
If the organic layer uses a simple structure, then the ease of manufacture is high, but the charge distribution and recombination efficiency are insufficient
Solution Approach 1:
The organic layer is divided into distinct functional segments (first emitting layer, charge generating layer, second emitting layer) that can be manufactured separately and assembled in a systematic sequence. This segmentation improves charge distribution efficiency while maintaining ease of manufacture through modular fabrication approaches
Solution Approach 2:
Different regions of the organic layer are assigned specific local qualities: the first emitting layer is optimized for hole injection, the charge generating layer for charge separation and transport, and the second emitting layer for electron injection and light emission. This local optimization enhances overall charge generation efficiency while the structured approach facilitates manufacturing
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 proposed structure achieves high luminous efficiency and extended lifespan by optimizing charge generation and recombination in the organic electric element, leading to improved performance in display panels and devices.
Implementation Method 1
an organic light emitting phenomenon refers to the phenomenon of converting electrical energy into light energy by means of an organic material
Implementation Method 2
a charge generating layer positioned between the first stack and the second stack
Data Source
AI summary
Provided are an organic electric element, a display panel and a display device including the organic electric element which include a charge generating layer including a first layer comprising a first compound and a second compound and a second layer comprising a third compound so that they may have excellent efficiency or lifespan.