Quantum Dot LED Structure With Nano-Metal Grooves for Light Extraction
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Solution Overview
Problem
Current quantum dot light-emitting devices have low luminescence efficiency due to inefficient light-emitting diodes and color conversion layers, which cannot meet the requirements of modern display products.
Innovation Solution
A light-emitting device is designed with a substrate, a light-emitting diode, and a color conversion layer, where nano-metal particles are filled into grooves on the light-emitting diode surface and a metal layer is added on the color conversion layer, enhancing luminescence efficiency through surface plasmons and improved photon density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional light-emitting diode and color conversion layer structure is used, then the device structure is simple, but the luminescence efficiency is low
Solution Approach 1:
Nano-metal particles are introduced as an intermediary substance between the light-emitting diode and color conversion layer. These particles generate surface plasmons that act as a mediator to enhance light-matter interaction, thereby improving luminescence efficiency without fundamentally changing the overall device structure
Solution Approach 2:
The optical properties of the light-emitting diode are enhanced by changing the physical parameters of the interface structure. Grooves are etched into the light-emitting diode surface and filled with nano-metal particles, modifying the local optical field distribution and photon density to improve light extraction efficiency
2Loss of energy
If the light-emitting diode luminescence efficiency is increased, then the overall luminescence efficiency improves, but the complexity of the light-emitting diode structure increases
Solution Approach 1:
The enhancement function is segmented from the main light-emitting diode structure and implemented as a separate surface treatment layer. The grooves and nano-metal particles form an independent functional layer that can be added without redesigning the core light-emitting diode structure
Solution Approach 2:
Instead of modifying the light-emitting diode in the planar direction, the enhancement is achieved by adding vertical dimensionality through grooves and filled nano-metal particles. This creates a three-dimensional surface structure that enhances light extraction without increasing lateral device complexity
3Loss of energy
If the color conversion efficiency is increased, then the full-color display performance improves, but the device structure becomes more complex
Solution Approach 1:
The light extraction enhancement function is merged with the color conversion layer structure. The grooves in the light-emitting diode are positioned to work synergistically with the color conversion layer, creating a combined structure that achieves both enhanced light extraction and efficient color conversion without adding separate independent components
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 solution significantly increases luminescence efficiency by enhancing the brightness and radiation rate of the light-emitting diode and color conversion layer, facilitating better light extraction and full-color display performance.
Implementation Method 1
enhancing luminescence efficiency through surface plasmons and improved photon density
Implementation Method 2
the exciting light is irradiated to a color conversion layer, so that the color conversion layer may convert the exciting light into the light of different colors
Data Source
AI summary
The present disclosure provides a light-emitting device, a method for manufacturing a light-emitting device and a display apparatus, and belongs to the field of display technology, and can solve the problem that the light-emitting device in the related art has low luminescence efficiency. The light-emitting device of the present disclosure includes: a substrate, a light-emitting diode on the substrate and a color conversion layer on a side of the light-emitting diode away from the substrate; the light-emitting device further includes: nano-metal particles; a plurality of grooves are formed in a surface of the light-emitting diode away from the substrate; and the nano-metal particles are filled in the plurality of grooves.