Quantum Dot Display Structure for UV Curing and Interface Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices, particularly quantum dot display devices, face challenges in achieving improved element characteristics such as enhanced light emission efficiency and reduced material mixing at interfaces, which affect the overall performance and reliability of the devices.
Innovation Solution
The proposed solution involves a display device structure that includes a first electrode, a second electrode, an intermediate layer with a quantum dot emission layer, and a reflective film. The reflective film is electrically disconnected from the first electrode and includes a metal material, such as aluminum or an aluminum alloy. The emission layer is cured with ultraviolet rays, and the reflective film enhances the exposure of these rays to the emission layer, improving curing efficiency. Additionally, the surface of a metal oxide layer is modified by ultraviolet radiation, which increases the surface modification effect and reduces material mixing at interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the emission layer is cured with ultraviolet rays, then the film curing degree is improved, but the ultraviolet rays may not sufficiently reach the emission layer, limiting curing efficiency
Solution Approach 1:
The reflective film acts as an intermediary element that reflects ultraviolet rays onto the emission layer, ensuring sufficient UV exposure for complete curing. This mediator approach solves the problem of insufficient UV ray reach while maintaining curing efficiency.
Solution Approach 2:
Instead of only exposing the emission layer from above, the reflective film introduces a secondary exposure path by reflecting UV rays from below, adding a dimensional aspect to the curing process that ensures complete penetration and curing of the emission layer.
2Device complexity
If the reflective film is electrically disconnected from the first electrode, then the device complexity is reduced, but the light emission efficiency may be affected
Solution Approach 1:
The device structure is segmented into electrical and optical functions. The reflective film is separated from the electrode structure, allowing it to serve primarily as an optical element for UV reflection without being part of the electrical conduction path, thus reducing electrical complexity while maintaining optical functionality.
Solution Approach 2:
The first electrode serves multiple functions: it provides electrical conduction for device operation and also acts as a reflective surface for ultraviolet rays. This multi-functionality compensates for the electrical disconnection of the reflective film, maintaining light emission efficiency without requiring additional electrical connections.
3Manufacturing precision
If the surface of the metal oxide layer is modified by ultraviolet radiation, then the surface modification effect is improved, but material mixing at interfaces may still occur
Solution Approach 1:
The metal oxide layer is formed as a preliminary protective barrier before the emission layer is applied. This pre-formed layer provides a stable interface that prevents material mixing, while still allowing UV radiation to pass through and modify its surface properties for enhanced performance.
Solution Approach 2:
The metal oxide layer serves as an intermediary between the first electrode and the emission layer. It provides surface modification through UV radiation while simultaneously acting as a barrier that prevents direct contact and mixing between the electrode materials and emission layer materials, maintaining interface purity.
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 improves the element characteristics of the light emitting element by increasing the degree of film curing of the emission layer and enhancing the surface modification of the metal oxide layer, thereby reducing material mixing and improving overall display performance.
Implementation Method 1
at least some of the ultraviolet rays which are radiated may be reflected by the reflective film and reach the emission layer
Implementation Method 2
curing the emission layer with ultraviolet rays
Implementation Method 3
the surface of a metal oxide layer is modified by ultraviolet radiation
Data Source
AI summary
A display device includes a first electrode, a second electrode on the first electrode and facing the first electrode, an intermediate layer between the first electrode and the second electrode and including an emission layer including a quantum dot, a first pixel defining layer which covers at least a portion of the first electrode and exposes an upper surface of the first electrode, a reflective film on the first pixel defining layer, and a second pixel defining layer on the reflective film.