Luminescent Element with Aperiodic Metal Microstructure
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Solution Overview
Problem
Conventional luminescent materials used in field emission devices suffer from low luminous efficiency, limiting their application in illumination and display techniques.
Innovation Solution
A luminescent element with a luminescent glass substrate doped with Y3AlxGa5-xO12:Tb and a metal layer composed of metals like Au, Ag, Al, Cu, Ti, Fe, Ni, Co, Cr, Pt, Pd, Mg, or Zn, where the metal layer forms an aperiodic microstructure upon annealing, enhancing surface plasmon effects to improve efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional luminescent materials (phosphor, nanocrystal) are used, then the structure can be simple, but the luminous efficiency is low
Solution Approach 1:
The patent uses a composite structure combining luminescent glass substrate with a metal layer containing nanocrystals. The glass provides structural stability and optical transparency, while the metal layer with nanocrystals enhances luminescent efficiency through surface plasmon resonance effects. This composite approach resolves the contradiction by achieving high luminous efficiency without excessive structural complexity.
Solution Approach 2:
The patent optimizes specific parameters including metal layer thickness (5-50 nm), nanocrystal size (5-50 nm), and metal composition (Au, Ag, Al, or their alloys) to maximize surface plasmon resonance effects. By carefully controlling these parameters, the luminescent efficiency is significantly improved while maintaining a relatively simple two-layer structure.
2Stability of the object's composition
If glass substrate is used instead of crystal or phosphor, then transparency and chemical stability are improved, but luminescent homogeneity needs enhancement
Solution Approach 1:
The patent introduces a metal layer with nanocrystals on the glass substrate surface to create local quality enhancement. The nanocrystals are distributed uniformly within the metal layer with specific size control (5-50 nm), providing localized surface plasmon resonance effects that improve luminescent homogeneity across the substrate surface while maintaining the overall chemical stability of the glass structure.
3Use of energy by moving object
If metal layer with aperiodic structure is formed, then surface plasmon effect is enhanced, but manufacturing process becomes more complex
Solution Approach 1:
The patent achieves aperiodic nanocrystal structures through controlled annealing processes with specific temperature ranges (200-500°C) and time durations (1-24 hours). By controlling these processing parameters, nanocrystals form with sizes of 5-50 nm in an aperiodic arrangement that enhances surface plasmon effects, while the overall process remains relatively simple and compatible with existing manufacturing techniques.
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 luminescent element achieves high luminous efficiency, homogeneity, and stability, overcoming the low efficiency issue of conventional materials, and is suitable for ultra-high brightness and high-speed motion applications like field emission displays.
Implementation Method 1
a surface plasmon can be formed between the metal layer and the luminescent substrate
Implementation Method 2
annealing the luminescent substrate and the metal layer in vacuum to form a metal microstructure of the metal layer
Implementation Method 3
emitting cathode-ray to the metal layer, forming a surface plasmon between the metal layer and the luminescent substrate by the radiation of the cathode-ray
Data Source
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AI summary
A luminescent element comprises: a luminescent substrate; and a metal layer with a metal microstructure formed on a surface of the luminescent substrate; the luminescent substrate comprises luminescent materials with a chemical composition of Y3AlxGa5-xO12:Tb, and 0≤x≤5. A preparation method of a luminescent element and a luminescence method are also provided. The luminescent element has good luminescence homogeneity, high luminescence efficiency, good luminescence stability and simple structure, and can be used in luminescent device with ultrahigh brightness.