LED Structure with Discontinuous Intermediate Layer for High Luminosity
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Solution Overview
Problem
Conventional light-emitting diodes (LEDs) have lower luminosity compared to traditional incandescent lamps, requiring higher currents or more LEDs to achieve sufficient luminosity, which increases energy consumption and occupies more space, thus necessitating improvements in luminance for broader adoption.
Innovation Solution
A light-emitting apparatus comprising multiple light-emitting semiconductor stacks connected by an intermediate layer with a discontinuous quantum dot structure, enhancing current flow and light-emitting efficiency through a space charge region and tunneling effect, while reducing series resistance and operating voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If higher current is provided to LEDs to increase luminosity, then light output is improved, but power consumption increases and suppresses the low power consumption benefit
Solution Approach 1:
The patent changes the electrical parameters of the LED structure by introducing an intermediate layer with specific conductivity characteristics (10^-6 to 10^3 S/cm) between p-type and n-type semiconductor layers. This parameter change enables improved current distribution and reduced series resistance, allowing higher luminosity at lower power consumption levels.
Solution Approach 2:
The patent employs a composite semiconductor structure consisting of multiple layers with different material properties: p-type semiconductor layer, intermediate layer with graded conductivity, and n-type semiconductor layer. This composite structure optimizes both light output and electrical efficiency by combining the advantages of different material compositions.
2Illumination intensity
If more LEDs are used to increase luminosity, then light output is improved, but occupied area increases and energy consumption increases
Solution Approach 1:
The patent merges multiple semiconductor layers into a single integrated LED structure with an intermediate layer that enhances overall performance. This consolidation achieves higher luminosity from a single device rather than requiring multiple separate LEDs, thereby reducing occupied area.
3Illumination intensity
If more LEDs are used to increase luminosity, then light output is improved, but energy consumption increases
Solution Approach 1:
The patent optimizes energy consumption by changing the electrical parameters through the intermediate layer structure, which reduces series resistance and improves current efficiency. This enables achieving higher luminosity with lower total energy consumption compared to using multiple conventional LEDs.
4Ease of manufacture
If conventional LED structure is used, then manufacturing is simple, but luminance is insufficient for practical lighting applications
Solution Approach 1:
The patent maintains manufacturing simplicity while improving luminance by introducing an intermediate layer with controlled conductivity parameters (10^-6 to 10^3 S/cm). This parameter-based approach allows standard manufacturing processes to be used while achieving superior light output performance.
Solution Approach 2:
The patent applies local quality improvement by inserting an intermediate layer with specific electrical properties at a particular location within the semiconductor structure. This localized modification enhances overall luminance without requiring complete restructuring of the entire device.
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 increases current density and light-emitting efficiency, allowing for higher luminance with lower operating voltage and reduced energy consumption, thereby improving LED performance and promoting their use in daily life applications.
Implementation Method 1
enhancing current flow and light-emitting efficiency through a space charge region
Implementation Method 2
enhancing current flow and light-emitting efficiency through a space charge region and tunneling effect
Implementation Method 3
The light-emitting diodes (LEDs) of the solid-state lighting elements have the characteristics of the low power consumption, low heat generation, long operational life
Data Source
AI summary
The present application discloses a light-emitting apparatus comprising a first light-emitting semiconductor stack, a first intermediate layer formed on the first light-emitting semiconductor stack and a second light-emitting semiconductor stack formed on the first intermediate layer. The first intermediate layer comprises a first conductive semiconductor layer, a second conductive semiconductor layer and an intermediate region. The intermediate region has a discontinuous structure located between the first conductive semiconductor layer and the second conductive semiconductor layer.