UV Semiconductor Chip With Angle-Selective Filter for Directed Disinfection
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Solution Overview
Problem
Existing optoelectronic semiconductor chips for disinfection devices lack efficient radiation characteristics, particularly in the UV range, due to absorption issues in housing materials, and there is a need for improved UV radiation delivery without the use of costly or difficult-to-process materials.
Innovation Solution
An optoelectronic semiconductor chip with a semiconductor layer sequence based on III-V compound materials, incorporating an active layer and an angle-selective dielectric filter that directs UV radiation into a predefined angular range, reducing absorption in the housing and enhancing efficiency without the need for lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional semiconductor chips are used for UV radiation, then radiation can be generated, but absorption in housing materials reduces delivery efficiency
Solution Approach 1:
The patent changes the angular distribution parameter of the emitted radiation by introducing an angle-selective filter. This modifies the radiation pattern from omnidirectional to a concentrated angular range, enabling more efficient delivery through housing materials while reducing absorption losses.
Solution Approach 2:
The angle-selective filter extracts and isolates a specific angular range of radiation from the total emitted spectrum. By separating the useful angular components from the rest, the system achieves directed radiation delivery without requiring complex housing designs or expensive optical materials.
2Productivity
If lenses or complex optical elements are used to focus UV radiation, then radiation directionality improves, but cost and manufacturing difficulty increase
Solution Approach 1:
The angle-selective filter provides a cost-effective alternative to expensive UV lenses and complex optical systems. The filter can be implemented as a thin-film coating or simple optical element that achieves radiation directionality without the high manufacturing costs and complexity of traditional optical focusing components.
Solution Approach 2:
The patent replaces mechanical/optical focusing systems (lenses, mirrors, complex assemblies) with a passive angle-selective filter that achieves radiation directionality through selective wavelength-angle filtering. This substitution simplifies the mechanical structure while maintaining or improving radiation delivery efficiency.
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 semiconductor chip achieves high efficiency in UV radiation delivery for disinfection applications by focusing radiation directly into a narrow angular range, reducing absorption in the housing and improving disinfection efficacy without the use of expensive or difficult-to-process materials.
Implementation Method 1
The active layer for generating primary radiation, wherein the primary radiation is generated, for example, by recombination of holes and electrons in the active layer
Implementation Method 2
an angle-selective filter on a first side of the semiconductor layer sequence. The angle-selective filter is configured to let pass only radiation, in particular only UV radiation and/or primary radiation, which hits the filter in a predefined angular range
Data Source
AI summary
The present disclosure provides an optoelectronic semiconductor chip including a semiconductor layer sequence with an active layer for generating primary radiation and an angle-selective filter on a first side of the semiconductor layer sequence. During operation, the semiconductor chip emits radiation in the UV range. The angle-selective filter is configured to let pass only radiation that hits the filter in a predefined angular range.