Infrared Conversion Element Using Rylene Dye Dispersion

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Solution Overview

Problem

Existing optoelectronic components struggle to efficiently convert primary electromagnetic radiation into secondary radiation in the infrared spectral range, with limitations in wavelength conversion efficiency and material agglomeration.

Innovation Solution

The development of an optoelectronic component comprising a semiconductor chip that emits primary radiation and a conversion element with a wavelength converting material, such as rylene dyes, embedded in a matrix material, which efficiently converts primary radiation into broadband infrared secondary radiation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If wavelength converting material is used to convert primary radiation into infrared secondary radiation, then conversion efficiency is improved, but material agglomeration occurs reducing performance

Engineering Contradiction:

Improveconversion efficiencyVSAvoidmaterial agglomeration

Core Design Contradiction:

Loss of energyVSStability of the object's composition

Solution Approach 1:

A matrix material is introduced as an intermediary medium to embed and disperse the wavelength converting material particles. This prevents direct contact and aggregation between converting material particles while allowing them to individually convert incident radiation, thereby maintaining high conversion efficiency without agglomeration-related performance degradation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent modifies the physical and chemical parameters of the wavelength converting material by selecting specific particle size ranges and chemical compositions that are optimized for dispersion stability in the matrix material. This parameter optimization prevents agglomeration while maintaining effective radiation conversion.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If conversion element is added to convert radiation wavelengths, then infrared emission capability is improved, but device structure becomes more complex

Engineering Contradiction:

Improveinfrared emission capabilityVSAvoiddevice structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The conversion element combining wavelength converting material with matrix material is integrated directly onto or into the semiconductor chip structure. This merging approach combines multiple functions (radiation conversion, structural support, and protection) into a single integrated component, adding infrared emission capability without proportionally increasing overall device complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The conversion element is designed to serve multiple functions simultaneously: it converts radiation wavelengths, provides structural support, and can be integrated with existing semiconductor chip architectures. This multi-functionality allows the system to gain infrared emission capability while minimizing additional complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 solution achieves high conversion efficiency of primary radiation into infrared secondary radiation, with over 90% conversion possible, while preventing material agglomeration through strategic substituents and matrix material selection.

Implementation Method 1

the conversion element comprises at least one wavelength converting material and a matrix material and the wavelength converting material partially converts the primary radiation of the semiconductor chip into secondary radiation

Methodology Applied

Scientific EffectWavelength conversion: Photoluminescence

Implementation Method 2

The wavelength converting material can also convert the primary radiation of the semiconductor chip completely or almost completely into the secondary radiation. The rylene dye has a high photostability and a high fluorescence quantum yield.

Methodology Applied

Scientific EffectFluorescence: Fluorescence

Implementation Method 3

The matrix material is a polymer in which the absorption in the infrared spectral range is as low as possible. The matrix material can have a high transparency in the primary radiation range.

Methodology Applied

Scientific EffectElectromagnetic radiation transmission:

Data Source

PatentUS20250107288A1Optoelectronic component and method for producing an optoelectronic component

Publication Date: 2025.03.27 AMS OSRAM INT GMBH

AI summary

An optoelectronic component includes a semiconductor chip which during operation emits electromagnetic primary radiation of a first wavelength range, and at least one conversion element. The conversion element is designed to emit electromagnetic secondary radiation of a second wavelength range. The electromagnetic secondary radiation is in the infrared spectral range. The conversion element includes at least one wavelength-converting material and a matrix material. The wavelength-converting material is a rylene dye.