Optoelectronic Semiconductor Component with Segmented Current Spreading
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Solution Overview
Problem
Existing optoelectronic semiconductor components with multiple active regions face challenges in maximizing brightness and luminous efficiency due to limitations in current spreading and radiation emission, particularly in reducing absorption and enhancing current distribution across the active regions.
Innovation Solution
The optoelectronic semiconductor component features a plurality of active regions spaced apart, with a core region, active layer, and cover layer based on nitride compound semiconductor materials, connected via a current spreading layer of transparent conductive oxide and a metal layer that forms a Schottky barrier, allowing for efficient current spreading and reduced absorption, while the metal layer also acts as a mirror to enhance radiation emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a current spreading layer is used to make electrical contact over multiple active regions, then current distribution is improved, but absorption increases and luminous efficiency decreases
Solution Approach 1:
The current spreading layer is segmented into multiple discrete contact regions, each contacting specific active regions. This segmentation allows current to be distributed to multiple active regions while minimizing the total material volume and absorption, as the conductive paths are localized rather than continuous across the entire surface.
Solution Approach 2:
The current spreading layer exhibits local quality variations with different material compositions or structures in different regions. Certain areas have higher conductivity to efficiently distribute current, while other areas use materials with lower absorption coefficients to minimize energy loss, optimizing both current distribution and luminous efficiency locally.
2Illumination intensity
If active regions are spaced apart to reduce mutual interference, then radiation emission is improved, but electrical connection complexity increases
Solution Approach 1:
Multiple electrical connection functions are merged into a single integrated current spreading layer structure. This layer simultaneously provides electrical contact to multiple spaced-apart active regions, current distribution pathways, and structural support, thereby simplifying the overall electrical connection architecture while maintaining the benefits of spaced active regions for reduced mutual interference.
3Illumination intensity
If more active regions are integrated to increase total light output, then brightness is improved, but current spreading requirements become more complex
Solution Approach 1:
The current spreading layer is designed with universal functionality to handle electrical connection and current distribution for any number of active regions. The layer employs a standardized pattern of conductive pathways and contact regions that can be scaled to accommodate increasing numbers of active regions without requiring fundamentally different design approaches, thus managing complexity while enabling higher total light output.
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 configuration significantly increases the luminous efficiency by minimizing absorption and ensuring simultaneous emission from a majority of active regions, enhancing the brightness and radiation exit surface characteristics.
Implementation Method 1
each of the current spreading layers comprises a transparent conductive oxide and is in electrical contact with the cover layer
Implementation Method 2
describes the Schottky barrier formation at metal-GaN interfaces
Implementation Method 3
the metal layer also acts as a mirror to enhance radiation emission
Implementation Method 4
the active regions can be formed as micro- or nanorods, wherein the active regions generate electromagnetic radiation
Data Source
AI summary
An optoelectronic semiconductor component and a method for producing an optoelectronic semiconductor component are disclosed. In an embodiment an optoelectronic semiconductor component includes a plurality of active regions configured to emit electromagnetic radiation, wherein the active regions are arranged spaced apart from each other, wherein the active regions have a main extension direction, wherein each active region has a core region, an active layer covering the core region at least in directions transverse to the main extension direction, wherein each active region has a cover layer covering the active layer at least in directions transverse to the main extension direction, wherein each active region has a current spreading layer at least partly covering sidewalls of each respective active region, and wherein a metal layer directly adjoins parts of the active regions and parts of the current spreading layers.