Perovskite Solar Module Encapsulation with Overlapping Barrier Layers
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Solution Overview
Problem
Conventional encapsulation technologies for perovskite solar cells fail to adequately protect against moisture and oxygen, leading to rapid degradation and poor stability, necessitating an improved encapsulation structure.
Innovation Solution
An encapsulation structure comprising alternately stacked inorganic and organic barrier layers, with inorganic layers covering a larger area than organic layers, forming overlapping regions and partial contact between adjacent inorganic layers to extend penetration paths and enhance moisture and oxygen barrier capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional encapsulation technology is used, then the encapsulation process can be simplified, but the waterproofness and stability of the perovskite solar cell module deteriorates
Solution Approach 1:
The patent applies composite materials by combining organic and inorganic barrier layers in an alternating stacked structure. The organic layers (e.g., epoxy resin, polyimide) provide flexibility and adhesion, while the inorganic layers (e.g., SiO2, Al2O3, TiO2) provide superior moisture and oxygen barrier properties. This composite structure achieves both adequate waterproofness and reasonable ease of manufacture through sputtering or chemical vapor deposition processes.
Solution Approach 2:
The patent implements the nesting principle by placing multiple barrier layers within each other in an alternating stacked configuration. The inorganic layers are nested between organic layers, creating a multi-level protective structure where each layer reinforces the barrier performance of the others, effectively blocking moisture and oxygen penetration paths.
2Device complexity
If high-temperature operation is required in encapsulation process, then the encapsulation structure can be simplified, but the performance of the perovskite solar cells deteriorates
Solution Approach 1:
The patent applies parameter changes by controlling the deposition parameters of the barrier layers, specifically keeping the thickness of inorganic layers between 5-50 nm and organic layers between 1-10 μm. These parameter optimizations allow the encapsulation structure to provide adequate protection without requiring high-temperature processing, thus preserving perovskite solar cell performance while maintaining structural integrity.
Solution Approach 2:
The patent uses thin film technology to create flexible encapsulation layers that can conform to the solar cell structure without requiring high-temperature processing. The alternating stacked structure of thin inorganic and organic films provides effective barrier protection while accommodating the temperature sensitivity of perovskite materials.
3Reliability
If the area of inorganic barrier layer is increased to block moisture and oxygen, then the barrier capability improves, but the manufacturing precision requirement increases
Solution Approach 1:
The patent resolves the precision issue by transitioning from controlling lateral area dimensions to controlling vertical thickness dimensions. By specifying thickness ranges (inorganic: 5-50 nm, organic: 1-10 μm) rather than area dimensions, the manufacturing process becomes more controllable using standard sputtering and deposition equipment, while still achieving effective barrier capability through the alternating stacked structure.
Solution Approach 2:
The patent applies partial action by using multiple thin layers with progressively optimized thicknesses rather than requiring each individual layer to provide complete barrier protection. The alternating stacked structure with cumulative thickness control achieves the required barrier capability without demanding extreme precision in each layer's area, as the collective effect of multiple layers provides the necessary protection.
Data Source
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AI summary
The present disclosure belongs to the technical field of photovoltaic modules, and relates to an encapsulation structure of a perovskite solar cell module and an application thereof. , thereby avoiding the failure of a perovskite solar cell module; and meanwhile, the area of an inorganic barrier layer is set to be greater than the area of the organic barrier layer, so that the purpose of blocking the moisture and oxygen from penetrating the organic barrier layer can be achieved, thereby improving the moisture and oxygen barrier capability of the perovskite solar cell module, prolonging the lifespan of the perovskite solar cell module, and facilitating to improve the reliability of the perovskite solar cell module in storage and use processes. Moreover, gaps between adjacent organic/inorganic barrier layers are not fully exposed to an external environment, thereby effectively blocking the lateral penetration of the water and oxygen, and thus the packaging effect is good.