Passivation Layer for a Transparent Conductive Oxide Layer in a Device with Organic Active Layer

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This invention describes a specialized passivation layer designed for transparent conductive oxide (TCO) layers used in electronic components that also have an organic active layer, such as organic solar cells. The layer consists of a monolayer of aromatic molecules (specifically, axially substituted metal phthalocyanines with acid groups and a trivalent or higher metal center) arranged in such a way that they enhance the vertical electrical conductivity between the organic layer and the TCO, improving device performance.

Use CasesContent extracted from patent full text and abstract with AI.

• Organic solar cells for improving power conversion efficiency
• Organic light-emitting diodes (OLEDs) to enhance performance and device lifespan
• Organic field-effect transistors (OFETs) to increase reliability and current transport
• Other optoelectronic devices using TCO and organic interfaces for improved charge injection/transport
• Flexible electronic devices utilizing TCO/organic stacks for robust interlayer connectivity

BenefitsContent extracted from patent full text and abstract with AI.

• Enhanced vertical electrical conductivity from organic layer to TCO, improving overall device efficiency
• Reduced charge trapping and better energy band alignment at the TCO–organic interface
• Potential for increased device lifespan and stability due to better interface engineering
• Compatibility with existing fabrication techniques (solution-based or coating methods)
• Enables new designs for high-performance, flexible optoelectronics

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Patent Abstract

The intention is to specify a passivation layer for TCO layers which ensures an - in comparison with the prior art - even further improved conductivity of the organic layer perpendicular to the TCO layer. A passivation layer is proposed, comprising a monolayer of aromatic molecules with dipole moment, in which the aromatic molecules forming the monolayer are molecules of axially substituted metal phthalocyanine with acid group, wherein the metal constituent is at least trivalent, and the aromatic portion of the molecules is arranged parallel to the surface of the oxide layer.