Metal Doped Molybdenum Oxide Layer for OLED Durability
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Solution Overview
Problem
The durability of molybdenum oxide layers in organic electroluminescence elements is low when subjected to wet processes, making it difficult to enhance the light-emitting and lifetime properties of the elements.
Innovation Solution
Incorporating a metal dopant into the molybdenum oxide layer, specifically transition metals or Group III-B metals, to improve the durability and functionality of the inorganic oxide layer, which is then used as a hole injection layer or in direct contact with the light-emitting layer, and deposited using methods like vacuum deposition or sputtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a molybdenum oxide layer is used as an electron injection layer, then electron injection efficiency is improved, but durability to wet process deteriorates
Solution Approach 1:
The patent applies composite materials by combining molybdenum oxide with metal dopants (such as aluminum, gallium, indium, or their alloys) to create a doped molybdenum oxide layer. This composite structure maintains the electron injection efficiency of pure molybdenum oxide while the metal dopants enhance the layer's durability and stability during wet processing steps, resolving the contradiction between functional performance and process robustness
Solution Approach 2:
The patent employs parameter changes by modifying the compositional parameters of the molybdenum oxide layer through metal doping. By controlling the dopant concentration and type, the patent optimizes both the electron injection properties and the wet process durability, transforming the material parameters to simultaneously achieve high reliability and stability
2Reliability
If multiple layers are laminated to enhance element properties, then light-emitting property and lifetime property are improved, but production complexity increases
Solution Approach 1:
The patent applies universality by designing the metal-doped molybdenum oxide layer to perform multiple functions simultaneously: it serves as an electron injection layer, provides durability during wet processing, and acts as a stable interface for subsequent layers. This multi-functionality reduces the need for additional separate layers, thereby maintaining improved lifetime properties while controlling production complexity
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 metal-doped molybdenum oxide layer enhances the light-emitting and lifetime properties of the organic electroluminescence elements, allowing for easier production and improved performance in devices such as flat panel displays.
Implementation Method 1
deposited using methods like vacuum deposition or sputtering
Implementation Method 2
deposited using methods like vacuum deposition or sputtering
Data Source
AI summary
It is an object of the present invention to provide an organic electroluminescence element which can be easily produced and has a good light-emitting property and a good lifetime property, and a method for producing the same.That is, the present invention provides the organic electroluminescence element comprising an anode, a light-emitting layer and a cathode, and further comprising a metal doped molybdenum oxide layer provided between the anode and the light-emitting layer; and the method for producing the organic electroluminescence element including a stacking step to obtain a metal doped molybdenum oxide layer by simultaneously depositing molybdenum oxide and a dopant metal on another layer which constitutes the element.