Organic Photon Up-conversion Medium Viscosity and Cost
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Solution Overview
Problem
Existing photon energy up-conversion systems, particularly those based on inorganic components, are limited by high costs, difficulty in large-area film formation, inflexibility, and requirement for high-intensity light sources, while organic systems lack versatility and efficiency.
Innovation Solution
A medium for photon energy up-conversion comprising at least two organic components and a matrix with a viscosity of 0.59 x 10^-3 Pa.s or higher, allowing for efficient up-conversion of light from longer to shorter wavelengths, suitable for large-area applications and use with low-intensity light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inorganic up-conversion systems are used, then up-conversion efficiency is achieved, but manufacturing cost increases and large-area film formation becomes difficult
Solution Approach 1:
The patent replaces expensive inorganic crystalline systems with organic compounds that are cheaper to manufacture. The organic sensitizers and emitters can be synthesized cost-effectively and processed into films over large areas, eliminating the need for expensive inorganic materials while maintaining up-conversion functionality.
Solution Approach 2:
The patent changes the material phase from solid crystalline inorganic systems to organic systems that can be processed in solution or as viscous fluids. This parameter change enables large-area film formation through conventional coating techniques and allows processing on flexible substrates, directly addressing the manufacturing difficulties of inorganic systems.
2Productivity
If inorganic up-conversion systems are used, then up-conversion process is achieved, but flexibility and adaptability are reduced
Solution Approach 1:
The patent transitions from rigid inorganic crystalline systems to organic systems with可调 viscosity (from solutions to viscous fluids). This enables the medium to be adapted to different substrates including flexible ones, and allows for various application methods such as spin-coating, dip-coating, or screen printing, greatly enhancing versatility.
Solution Approach 2:
The organic-based medium can serve multiple functions: it can be applied to rigid and flexible substrates, processed at different viscosities for different applications, and tuned for various spectral ranges by selecting different organic sensitizers and emitters. This multi-functionality exceeds the limited adaptability of inorganic systems.
3Adaptability or versatility
If conventional organic up-conversion systems are used, then organic compound based up-conversion is achieved, but viscosity is too low causing leakage and device complexity
Solution Approach 1:
The patent increases the viscosity parameter of the organic medium from typical solution levels to highly viscous fluid or paste ranges. This viscosity increase eliminates the need for sealed compartments to prevent leakage, simplifying device structure while maintaining the advantages of organic compounds.
Solution Approach 2:
The patent introduces a matrix component as an intermediary that provides structural support and maintains high viscosity. This matrix acts as a binding medium that holds the organic sensitizers and emitters in place, eliminating the need for complex sealed compartments while preserving the benefits of organic-based up-conversion.
4Productivity
If high-intensity pulsed lasers are used for up-conversion, then up-conversion process is achieved, but light source cost and intensity requirement increase
Solution Approach 1:
The patent replaces expensive high-intensity pulsed laser systems with cheaper, continuous low-intensity light sources. The organic sensitizers are designed to efficiently absorb photons from these lower-intensity sources, eliminating the need for costly laser equipment while maintaining effective up-conversion.
Solution Approach 2:
The patent optimizes the absorption cross-section parameter of the organic sensitizers to maximize photon capture efficiency at low light intensities. By tuning the molecular structure of sensitizers and emitters, the system achieves effective energy transfer from low-intensity continuous light sources, fundamentally changing the intensity parameter requirement compared to inorganic systems.
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 enables versatile photon energy up-conversion with high efficiency, allowing for the use of non-coherent sunlight and achieving quantum efficiencies of 5-6% with broad spectral coverage, suitable for large-area opto-electronic devices and spectrum concentration.
Implementation Method 1
a first component is capable of absorbing light at a first wavelength region w ≤ λ 1 ≤ x, which first component acts as a sensitizer in said medium, and wherein a second component is capable of emitting light at a second wavelength region y ≤ λ 2 ≤ z, which second component acts as an emissive component in said medium, wherein λ 2 ≤ λ 1 , and wherein, upon absorption of light by said first component at said first wavelength region λ 1, said emissive component emits light at said second wavelength region λ 2
Implementation Method 2
A medium for photon energy up-conversion comprising at least two components and a matrix in which said at least two components are distributed
Data Source
Figure 1
Figure 2A~2B
Figure 3A~4B
AI summary
The present invention relates to a medium for photon energy up-conversion, a photon-energy up-conversion device comprising said medium and to uses of said medium. The present invention also relates to a method of photon energy up-conversion using said medium or said device.