Recently, perovskite solar cells (PSCs) have attracted phenomenal research interest due to their potential as the next‐generation photovoltaics. Despite rapid development in this field, further increasing their power conversion efficiency (PCE) remains a critical issue for the commercialization of PSCs. Herein, the application of Ag nanoparticle (NP) layers via vapor‐phase deposition onto perovskite active layers is investigated. The formation of unique, crescent‐shaped Ag NPs is confirmed by scanning electron microscopy (SEM), which shows that the NPs self‐assemble along the grain boundaries of perovskite, leading to their unique shape. The PCE for devices incorporating an optimized size of Ag NPs of 79 ± 6 nm increase from 11.63% to 13.46% with an improvement factor of 15.74%. The increase in PCE is can be attributed to an increase in short‐circuit current density (J_sc) that is assigned to an increase in optical path length and absorption. NPs exhibit the ability to increase the optical path length of photons in the device due to the near‐field and far‐field enhancement (plasmonic scattering) and consequently may act to improve the photon‐to‐electron conversion efficiency (ΔIPCE) and PCE of PSCs. Moreover, ultraviolet photoelectron spectroscopy reveals a decrease in hole injection barrier (ϕ_h), which also contributes to enhanced performance.

中文翻译：

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等离子体银纳米粒子对钙钛矿太阳能电池倒置性能的影响

最近，钙钛矿太阳能电池（PSC）由于其作为下一代光伏电池的潜力而吸引了惊人的研究兴趣。尽管在该领域中发展迅速，但进一步提高其功率转换效率（PCE）仍然是PSC商业化的关键问题。在本文中，研究了通过气相沉积将银纳米颗粒（NP）层应用于钙钛矿活性层上的应用。扫描电子显微镜（SEM）证实了独特的月牙形银纳米颗粒的形成，这表明纳米颗粒沿着钙钛矿的晶界自组装，从而形成了独特的形状。结合了Ag NP最佳尺寸的79±6 nm的器件的PCE从11.63％增加到13.46％，改进因子为15.74％。J _sc），其被分配为增加光程长度和吸收。由于近场和远场增强（等离子散射），NP表现出增加设备中光子光程长度的能力，因此可能起到改善光子到电子转换效率（ΔIPCE）和PCE的作用。 PSC。此外，紫外光电子能谱显示出空穴注入势垒（ϕ _h）的减小，这也有助于提高性能。