We report on submicron organosilicate barrier films produced rapidly in air by a scalable spray plasma process that improves both the stability and efficiency of perovskite solar cells. The plasma is at sufficiently low temperature to prevent damage to the underlying layers. Oxidizing species and heat from the plasma improve device performance by enhancing both interfacial contact and the conductivity of the hole transporting layer. The thickness of the barrier films is tunable and transparent over the entire visible spectrum. The morphology and density of the barrier are shown to improve with the addition of a fluorine-based precursor. Devices with submicron coatings exhibited significant improvements in stability, maintaining 92% of their initial power conversion efficiencies after more than 3000 h in dry heat (85 °C, 25% RH) while also being resistant to degradation under simulated operational conditions of continuous exposure to light, heat, and moisture. X-ray diffraction measurements performed while heating showed the barrier film dramatically slows the formation of PbI₂. The barrier films also are compatible with flexible devices, exhibiting no signs of cracking or delamination after 10 000 bending cycles on a 127 μm substrate with a bending radius of 1 cm.

中文翻译：

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沉积在空气中的亚微米级柔性阻隔膜提高了钙钛矿太阳能电池的稳定性和效率

我们报告了通过可扩展的喷雾等离子工艺在空气中快速生产的亚微米有机硅酸盐阻隔膜，该膜可改善钙钛矿太阳能电池的稳定性和效率。等离子体处于足够低的温度下，以防止损坏下面的层。通过增强界面接触和空穴传输层的电导率，等离子体的氧化物质和热量改善了器件性能。阻挡膜的厚度在整个可见光谱范围内是可调的和透明的。屏障的形态和密度显示出随着添加基于氟的前体而改善。具有亚微米涂层的设备在稳定性方面有显着改善，在干热（85°C，相对湿度（25％RH），同时在连续暴露于光，热和湿气的模拟操作条件下也具有抗降解性。加热时进行的X射线衍射测量显示，阻挡膜大大减慢了PbI的形成₂。阻挡膜也与柔性器件兼容，在127μm弯曲半径为1 cm的基板上进行10 000次弯曲循环后，没有任何破裂或分层的迹象。