Electrode for Photoelectrocatalysis and Method for Its Preparation

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This invention relates to an improved electrode for photoelectric catalysis, which is especially useful in solar cells and photoelectrochemical devices. The electrode features a catalytic layer of semiconductor particles (such as pigment nanoparticles) that are at least partially embedded within an amorphous matrix of a different semiconductor. This matrix surrounds the particles, aiding in charge separation and transport, and the electrode’s structure is optimized for high homogeneity and performance. The patent also covers a cost-effective manufacturing method for producing such electrodes, particularly ensuring uniform particle size and distribution by using a stepwise process that combines electrophoretic deposition and chemical etching.

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• Solar cells for electricity generation using sunlight.
• Photoelectrochemical cells for water splitting to produce hydrogen and oxygen (solar fuels).
• Electrodes for the reduction of carbon dioxide to useful chemicals or fuels.
• Catalysts in environmental purification systems (e.g., air or water purification using photocatalysis).
• Integration into devices requiring efficient or durable photoactive electrodes, such as sensors.

BenefitsContent extracted from patent full text and abstract with AI.

• Enhanced charge separation and reduced recombination losses, leading to higher efficiency of photoelectrochemical and photovoltaic devices.
• Greater electrode uniformity achieved by controlling nanoparticle size distribution and embedding within a matrix.
• Cost-effective production enabled by using commercially available (even lower-quality) particles and improving their properties during manufacturing.
• Improved durability and lifetime of electrodes, as the matrix can protect particles from degradation in harsh chemical environments.
• Potential use of non-toxic and readily available materials, increasing environmental safety and sustainability of the electrodes.
• Adaptability to both photoelectrochemical and photovoltaic systems.

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Patent Abstract

The invention relates to an electrode (10) for photoelectric catalysis, comprising a carrier layer (1), on which a catalytic layer (2) is arranged, which comprises particles (3) composed of a first semiconductor material, to a method for producing said electrode, and to a solar cell having such an electrode. According to the invention the catalytic layer (2) also has a matrix (4) composed of a second semiconductor material, which at least partially surrounds the particles.