STEM与日常科技·英语30篇（5）

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钙钛矿太阳能电池为何实验室效率高，但实测稳定性不足？

Perovskite cells reach over twenty-six percent efficiency in labs—nearly matching silicon—but degrade rapidly under heat and moisture.
Their crystal lattice breaks down when exposed to UV light or oxygen, releasing volatile organic components over weeks.
Encapsulation helps, yet microscopic pinholes in barrier films let in enough humidity to trigger ion migration inside the layer.
Unlike silicon panels tested for twenty-five years, perovskites lack standardized field aging protocols for commercial certification.
Manufacturers stack perovskite on silicon in tandem cells to boost output, but interlayer stress accelerates delamination outdoors.
Accelerated stress tests simulate years of desert sun in days, revealing efficiency drops of fifteen percent after 1,000 hours.
Researchers add cesium or rubidium ions to stabilize the lattice, yet batch-to-batch consistency remains hard at scale.
Grid-scale pilot farms in Germany and Japan monitor performance decay monthly to refine encapsulation chemistry.
Cost advantages exist—perovskites use solution processing like inkjet printing—but durability must match price to displace silicon.
Until encapsulation and interfacial engineering mature, perovskites remain promising in labs, not rooftops.