Perovskite Solar Module Multi-Layer Sealing Structure
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Solution Overview
Problem
Perovskite solar cell modules face durability issues due to moisture intrusion, which degrades the perovskite layer and reduces conversion efficiency, as existing sealing structures with low water vapor permeability materials like butyl rubber do not completely prevent moisture ingress.
Innovation Solution
A novel solar cell module structure featuring a substrate, a photoelectric conversion layer with a perovskite compound, and a multi-layer sealing system where the second sealing layer has lower water vapor permeability than the first sealing layer, and an end face sealing structure that covers edge portions, with the first sealing layer spaced apart from the end face sealing structure to prevent moisture from reaching the photoelectric conversion layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single sealing layer with low water vapor permeability material is used, then moisture protection is improved, but sealing reliability is insufficient due to incomplete prevention of moisture ingress
Solution Approach 1:
The sealing structure is divided into multiple sealing layers with different water vapor permeability characteristics. The first sealing layer uses a material with relatively low water vapor permeability, while the second sealing layer uses a material with relatively high water vapor permeability, creating a segmented barrier system that more effectively prevents moisture intrusion compared to a single sealing layer
Solution Approach 2:
The patent employs composite sealing materials with different permeability properties arranged in layers. This composite structure combines materials with contrasting water vapor transmission characteristics to create a more robust sealing system that addresses the limitations of using a single material type
2Reliability
If the first sealing layer is placed in direct contact with the end face sealing structure, then sealing coverage is improved, but moisture trapping occurs that accelerates photoelectric conversion layer degradation
Solution Approach 1:
The first sealing layer is extracted from direct contact with the end face sealing structure by positioning it to overlap only with the light-receiving surface area. This separation removes the harmful interaction that would trap moisture at the interface between the sealing layer and end face sealing structure, thereby protecting the photoelectric conversion layer from moisture-induced degradation
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 proposed structure significantly enhances the durability and retention of conversion efficiency of perovskite solar cell modules by effectively preventing moisture intrusion, as demonstrated by accelerated testing showing high retention rates of conversion efficiency and minimal optical reflectance changes.
Implementation Method 1
the photoelectric conversion layer contains an organic material and converts light to energy
Implementation Method 2
the second sealing layer has a lower water vapor permeability than the first sealing layer
Data Source
Figure 1A~1B
Figure 2~3
Figure 4~5
AI summary
The present disclosure provides a solar cell module that can have high durability. The solar cell module (100) of the present disclosure includes: a substrate (1); a photoelectric conversion layer (5); a first sealing layer (4) located between the substrate (1) and the photoelectric conversion layer (5); a second sealing layer (3) located between the substrate (1) and the first sealing layer (4); and an end face sealing structure (7) that covers at least part of an edge portion of the substrate (1) and at least part of an edge portion of the second sealing layer (3). The photoelectric conversion layer (5) contains an organic material and convers light to energy. The second sealing layer (3) has a lower water vapor permeability than the first sealing layer (4). At least part of the first sealing layer (4) is spaced apart from the end face sealing structure (7).