High-Density Semiconductor Nanocrystals for Optoelectronic Sedimentation
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Solution Overview
Problem
Semiconductor nanocrystals in optoelectronic devices have lower effective densities due to passivation layers and high surface areas, leading to separation from phosphor particles during sedimentation, which affects thermal contact and efficiency.
Innovation Solution
Incorporating high-density elements, such as luminescent or non-emissive particles, and using high-density oxide layers to increase the average density of semiconductor structures, allowing for improved sedimentation and thermal contact, and optimizing the structure with linkers for enhanced bonding and density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If semiconductor nanocrystals are used with passivation layers, then the stability and protection of the nanocrystals is improved, but the effective density decreases leading to separation during sedimentation
Solution Approach 1:
The patent creates composite structures by combining semiconductor nanocrystals with high-density inorganic materials (such as metal oxides or silicates) to form hybrid particles. This composite approach allows the structure to simultaneously exhibit the protective and stabilizing properties of passivation layers while achieving the high density required for effective sedimentation and thermal contact.
Solution Approach 2:
The patent employs a nested structure where semiconductor nanocrystals are embedded within or coated by high-density inorganic shell materials. This nested configuration allows the inner nanocrystal to maintain its functional properties while the outer high-density shell provides the necessary mass for sedimentation and improved thermal contact with the heat sink.
2Productivity
If high-density elements are incorporated to increase sedimentation rate, then the thermal contact and efficiency are improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple functions into a single integrated structure: the high-density inorganic shell simultaneously provides sedimentation enhancement, thermal contact improvement, and structural protection. This consolidation avoids the need for separate components and reduces overall device complexity while achieving the desired sedimentation rate and thermal performance.
Solution Approach 2:
The high-density inorganic shell material serves multiple functions: it increases the effective density for sedimentation, provides thermal conduction pathways to the heat sink, offers mechanical protection to the nanocrystal, and can be engineered to control optical properties. This multi-functionality reduces the need for additional components and simplifies the overall device architecture.
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 approach enhances the settling rate and thermal contact of semiconductor structures, improving the operating lifetime and efficiency of optoelectronic devices by maintaining color consistency and increasing external quantum efficiency.
Implementation Method 1
a structure with improved density... a high-density element for increasing a density of the structure... the structure is configured to emit light... sedimented semiconductor structures for light conversion
Implementation Method 2
the structure is configured or designed to absorb incident electromagnetic radiation of a first wavelength range, a primary radiation, convert the primary radiation into electromagnetic radiation of a second wavelength range, a secondary radiation, and emit a secondary radiation
Data Source
AI summary
A structure and a method for producing a structure are disclosed. In an embodiment a structure includes at least one semiconductor structure comprising at least one semiconductor nanocrystal and a high-density element for increasing a density of the structure, wherein a density of the high-density element is greater than a density of silica, and wherein the structure is configured to emit light.