Photoelectric Conversion Module Sealing for Oxygen Barrier Durability
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Solution Overview
Problem
Conventional photoelectric conversion elements degrade due to insufficient protection against oxygen and water, leading to performance deterioration.
Innovation Solution
A photoelectric conversion module is designed with a substrate and a sealing member using polyvinyl alcohol, ethylene-vinyl alcohol copolymer, or butylenediol-vinyl alcohol copolymer to create an oxygen-impermeable barrier, preventing oxygen ingress and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sealing layer is provided to isolate the photoelectric conversion element from the outside world, then protection against water is improved, but protection against oxygen is insufficient leading to performance degradation
Solution Approach 1:
The sealing member is constructed as a composite material comprising a base resin and a specific additive (at least one selected from iron powder, copper powder, manganese powder, nickel powder, or their oxides). This composite structure provides enhanced oxygen barrier properties while maintaining sealing functionality, effectively preventing oxygen ingress that causes performance degradation in perovskite photoelectric conversion elements.
2Ease of manufacture
If the photoelectric conversion element is exposed to the outside environment, then manufacturing and operation is simpler, but water and oxygen cause chemical changes and performance degradation
Solution Approach 1:
The sealing member's composition is optimized by incorporating specific additives (iron powder, copper powder, manganese powder, nickel powder, or their oxides) at controlled concentrations. This parameter change in material composition significantly enhances the oxygen barrier properties while maintaining manufacturability, creating a balance between ease of manufacture and performance stability.
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 module's design significantly reduces oxygen-induced degradation, improving the durability and performance of the photoelectric conversion elements.
Implementation Method 1
the first sealing material includes at least one selected from the group consisting of polyvinyl alcohol, an ethylene-vinyl alcohol copolymer, and a butylenediol-vinyl alcohol copolymer
Data Source
AI summary
A photoelectric conversion module according to the present disclosure includes: a substrate; a photoelectric conversion element; and a first sealing member, wherein the photoelectric conversion element is sealed by the substrate and the first sealing member, the first sealing member includes a first sealing portion formed of a first sealing material, and the first sealing material includes at least one selected from the group consisting of polyvinyl alcohol, an ethylene-vinyl alcohol copolymer, and a butylenediol-vinyl alcohol copolymer. The photoelectric conversion element may include, for example, a first electrode, a photoelectric conversion layer, and a second electrode in this order.