宝子们，在光电子应用领域，金属卤化物钙钛矿可是个潜力股，未来有希望给光电器件带来大变革。但它一直有个让人头疼的问题，就是内在不稳定，降解得比较快，这严重影响了它的实际应用。最近科学家们发现，光照会让钙钛矿薄膜的晶格膨胀，晶格的动态变化会主导降解速度。光照下晶格不断演变，钙钛矿晶粒相互拥挤，在晶粒边界产生很大局部应变，导致缺陷形成和碘成分流失，加速薄膜降解😫别担心，研究人员找到解决办法啦！他们用反式聚异戊二烯（TPI）把每个钙钛矿晶粒物理分隔开，避免了晶粒边界的光机械损伤。在太阳能电池里，经过处理后，在55°C持续一个太阳光照，电池1000小时后还能保持97%的性能👍这项研究让我们看到了提高钙钛矿太阳能电池稳定性的新希望，说不定以后能有更高效、更耐用的太阳能电池走进我们的生活呢！
期刊
Energy & Environmental Science
标题
Photomechanically accelerated degradation of perovskite solar cells
摘要
Understanding the origin of intrinsic instability of metal halide perovskites is indispensable for their advancement in opto-electronic applications. Here, we report a photomechanically accelerated degradation mechanism of perovskite thin films, in which the lattice expansion driven by light illumination has been found to govern the degradation kinetics. The dynamic lattice evolution under illumination causes crowding of the perovskite grains, leading to large local strains near the grain boundaries (GBs), which thereby facilitates defect formation and iodine component loss in the region. We show that the physical separation of each perovskite grain using trans-polyisoprene (TPI) could circumvent photomechanical damage at the GBs, achieving a T97 of 1000 h under continuous one-sun illumination at 55 °C in solar cell devices. Our results emphasize the nontrivial role of dynamic lattice deformation in the decomposition of perovskite thin films and open up new possibilities to further improve the intrinsic stability of solar cells.
原文链接
https://pubs.rsc.org/en/content/articlelanding/2025/ee/d4ee04878d
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静远嘲风（MY Scimage） 成立于2007年，嘲风取自中国传统文化中龙生九子，子子不同的传说，嘲风为守护屋脊之瑞兽，喜登高望远；静远取自成语“宁静致远”，登高莫忘初心，远观而不可务远。
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