Rare-Earth Chromophore Stack for Stable Light Conversion Pads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The use of quantum dots in optoelectronic devices faces challenges such as toxicity, complex implementation, reliability issues due to sensitivity to environmental factors, and low stability under heat and light, making them unsuitable for long-term use in conversion pads.
Innovation Solution
A stack of layers comprising rare earth materials and chromophores is used to achieve the antenna effect, providing a non-toxic, stable, and efficient energy transfer mechanism for light conversion, replacing quantum dots in conversion pads and filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If quantum dots are used in conversion pads, then light conversion efficiency is improved, but toxicity and reliability problems occur due to sensitivity to environmental factors
Solution Approach 1:
The patent changes the material parameters by replacing quantum dots with rare earth-doped glass ceramics, which have different thermal and optical stability parameters. This material substitution maintains light conversion efficiency while improving reliability under heat and light exposure.
Solution Approach 2:
The invention uses composite glass ceramic materials doped with rare earth ions, combining the optical properties of rare earths with the structural stability of glass ceramics. This composite approach achieves both efficient light conversion and enhanced environmental stability.
2Use of energy by moving object
If quantum dots are used in conversion pads, then light conversion capability is improved, but complex manufacturing processes are required
Solution Approach 1:
The patent simplifies manufacturing by changing from quantum dot deposition processes to conventional glass ceramic sintering processes. This parameter change in manufacturing approach maintains light conversion capability while significantly reducing process complexity.
3Measurement precision
If quantum dots are used in conversion pads, then color emission precision is improved, but sensitivity to environmental factors increases
Solution Approach 1:
The glass ceramic matrix creates an inert protective environment around the rare earth ions, shielding them from oxidation and environmental degradation. This inert environment preserves both the emission precision and chemical stability of the material.
Solution Approach 2:
The combination of rare earth ions within a glass ceramic matrix provides both the precise emission characteristics of rare earths and the environmental protection of the glass ceramic structure, reducing sensitivity to harmful factors.
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 rare earth-chromophore stack enhances the stability and quantum efficiency of optoelectronic devices, enabling reliable long-term operation and efficient light conversion without the drawbacks of quantum dots, such as toxicity and sensitivity to environmental factors.
Implementation Method 1
A stack of layers comprising a chromophore and a rare earth is used to achieve the antenna effect, providing a non-toxic, stable, and efficient energy transfer mechanism for light conversion
Implementation Method 2
Each conversion pad is designed so as to absorb at least part of the light, for example of blue color, emanating from the LED that the sub-pixel comprises and to emit in response a light of different color
Data Source
AI summary
A stack of antenna-effect materials that includes a superposition of rare-earth layers on chromophores layers. Also, an optoelectronic device the sub-pixels of which may include: a light-conversion module including a conversion pad and/or a filter. the conversion pad and/or the filter including the stack of antenna-effect materials.