Dye-Sensitized Solar Cell Sealing with Varying Thickness
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Solution Overview
Problem
Dye-sensitized solar cells face durability issues in high-temperature and high-humidity environments due to electrolyte leakage and moisture intrusion, where the thickness of the sealing section affects both electrolyte leakage and adhesive strength, leading to reduced photoelectric conversion efficiency and durability.
Innovation Solution
A dye-sensitized solar cell with a resin sealing section that has varying thickness, increasing or decreasing as distance from the electrolyte, with inclined faces contacting the electrodes, which reduces the electrolyte passage area and enhances adhesive strength, thereby preventing leakage and intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the sealing section is increased, then the adhesive strength to electrodes is improved, but the cross-sectional area of electrolyte passage increases leading to electrolyte leakage
Solution Approach 1:
The sealing section employs varying thickness distribution, with greater thickness at the periphery (contacting electrodes) for strong adhesion, and reduced thickness at the center (facing electrolyte) to minimize passage area. This local differentiation resolves the contradiction between needing sufficient adhesive strength and preventing electrolyte leakage.
2Loss of substance
If the thickness of the sealing section is decreased, then the cross-sectional area of electrolyte passage is reduced, but the adhesive strength to electrodes becomes weaker causing delamination
Solution Approach 1:
The sealing section employs varying thickness distribution, with greater thickness at the periphery (contacting electrodes) for strong adhesion, and reduced thickness at the center (facing electrolyte) to minimize passage area. This local differentiation resolves the contradiction between needing sufficient adhesive strength and preventing electrolyte leakage.
3Reliability
If the thickness of the sealing section is increased, then structural stability is improved, but the cross-sectional area of moisture passage increases leading to moisture intrusion
Solution Approach 1:
The sealing section employs varying thickness distribution, with greater thickness at the periphery (contacting electrodes) for strong adhesion and structural stability, and reduced thickness at the center (facing electrolyte) to minimize passage area for both electrolyte and moisture, preventing intrusion while maintaining durability.
4Object-affected harmful factors
If the thickness of the sealing section is decreased, then the cross-sectional area of moisture passage is reduced, but the adhesive strength to electrodes becomes weaker
Solution Approach 1:
The sealing section employs varying thickness distribution, with greater thickness at the periphery (contacting electrodes) for strong adhesion and structural stability, and reduced thickness at the center (facing electrolyte) to minimize passage area for both electrolyte and moisture, preventing intrusion while maintaining durability.
Data Source
AI summary
The present invention is a dye-sensitized solar cell that has a pair of electrodes that oppose each other, a sealing section that joins the pair of electrodes, an electrolyte that fills a cell space that is surrounded by the pair of electrodes and the sealing section, wherein the sealing section has a resin sealing section that contains a resin, the resin sealing section has a changing-thickness section, the thickness of which increases or decreases as a distance from the electrolyte is increased and which has an inclined face, and the resin sealing section comes into contact, along the inclined face of the changing-thickness section, with an electrode of the pair of electrodes that opposes the inclined face.