STEM与日常科技·英语30篇（5）
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Why Perovskite Solar Cells Show Lab Gains But Lag in Real-World Stability Tests
钙钛矿太阳能电池为何实验室效率高，但实测稳定性不足？
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Perovskite cells reach over twenty-six percent efficiency in labs—nearly matching silicon—but degrade rapidly under heat and moisture.
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Their crystal lattice breaks down when exposed to UV light or oxygen, releasing volatile organic components over weeks.
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Encapsulation helps, yet microscopic pinholes in barrier films let in enough humidity to trigger ion migration inside the layer.
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Unlike silicon panels tested for twenty-five years, perovskites lack standardized field aging protocols for commercial certification.
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Manufacturers stack perovskite on silicon in tandem cells to boost output, but interlayer stress accelerates delamination outdoors.
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Accelerated stress tests simulate years of desert sun in days, revealing efficiency drops of fifteen percent after 1,000 hours.
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Researchers add cesium or rubidium ions to stabilize the lattice, yet batch-to-batch consistency remains hard at scale.
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Grid-scale pilot farms in Germany and Japan monitor performance decay monthly to refine encapsulation chemistry.
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Cost advantages exist—perovskites use solution processing like inkjet printing—but durability must match price to displace silicon.
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Until encapsulation and interfacial engineering mature, perovskites remain promising in labs, not rooftops.