Titanium Oxide Adhesive Layer for Optoelectronic Components
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Solution Overview
Problem
Optoelectronic components, such as LEDs, face reduced efficiency due to radiation absorption by metal adhesive layers used to fix contact structures, which also affects adhesion and reflectivity.
Innovation Solution
An optoelectronic component utilizing a titanium oxide adhesive layer with specific oxidation states for the titanium and oxygen, providing good adhesion and electrical conductivity while minimizing radiation absorption, thereby increasing reflectivity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal adhesive layer is used to fix contact structures, then adhesion is improved, but radiation absorption increases and efficiency decreases
Solution Approach 1:
The patent changes the material composition parameters of the adhesive layer by incorporating titanium oxide with specific oxidation states (Ti²⁺, Ti³⁺, Ti⁴⁺) in controlled ratios. This parameter change allows the adhesive layer to maintain good adhesion while significantly reducing radiation absorption compared to pure metal adhesive layers, as the titanium oxide composition can be optimized for both mechanical bonding and optical transparency.
Solution Approach 2:
The patent uses a composite adhesive layer made of titanium oxide with mixed oxidation states rather than a pure metal adhesive layer. This composite material combines the adhesion properties of metal oxides with reduced optical absorption, creating a multi-functional adhesive layer that satisfies both mechanical and optical requirements simultaneously.
2Loss of energy
If the titanium adhesive layer is made as thin as possible, then radiation absorption is reduced, but adhesion of contact structures deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the titanium oxide adhesive layer by controlling the ratios of different oxidation states (Ti²⁺, Ti³⁺, Ti⁴⁺). This allows optimization of the material's intrinsic adhesion properties, enabling the use of thicker adhesive layers (reducing the need for ultra-thin deposits) while maintaining both adhesion strength and reduced radiation absorption.
Solution Approach 2:
The patent applies local quality by creating a titanium oxide adhesive layer with spatially varying or compositionally differentiated oxidation states. By controlling the distribution of Ti²⁺, Ti³⁺, and Ti⁴⁺ species within the adhesive layer, the patent optimizes different regions for either adhesion (where reduced oxidation states may provide better bonding) or optical transparency (where higher oxidation states reduce absorption).
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 use of titanium oxide adhesive layers with controlled oxidation states enhances adhesion and reduces radiation absorption, leading to improved efficiency and reflectivity of optoelectronic components by minimizing absorption losses.
Implementation Method 1
radiation, which impinges on such a metal adhesive layer, is partially absorbed so that this radiation is not radiated to the outside and therefore the overall efficiency of the optoelectronic component is reduced
Data Source
AI summary
The invention relates to an optoelectronic component. The component includes a semiconductor layer sequence having an active layer that is designed to emit electromagnetic radiation during operation of the component, at least one current-spreading layer on a radiation outlet surface of the semiconductor layer sequence, wherein the current-spreading layer is connected to a contact structure in an electrically conductive manner by means of an adhesion layer. The adhesion layer comprises a titanium oxide, wherein in the titanium oxide the oxygen has the oxidation state W0, with W0=−2, and the titanium has the oxidation state WT, with 0 <WT<+4.