Stabilization of Inorganic Perovskite Solar Cells with a 2D Dion–Jacobson Passivating Layer,Advanced Materials

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Stabilization of Inorganic Perovskite Solar Cells with a 2D Dion–Jacobson Passivating Layer
Advanced Materials ( IF 27.4 ) Pub Date : 2023-07-18 , DOI: 10.1002/adma.202304150
Luyan Wu _{1,

2} , Guixiang Li _{2,

3,

4} , Karunanantharajah Prashanthan _{2,

5} , Artem Musiienko ₂ , Jinzhao Li ₂ , Thomas W Gries ₂ , Hao Zhang ₆ , Hans Köbler ₂ , Patryk Janasik ₇ , Augustine N S Appiah ₇ , Gopinath Paramasivam ₂ , Tianxiao Sun ₂ , Meng Li ₈ , Daniela Marongiu ₁ , Michele Saba ₁ , Antonio Abate _{2,

4}

Affiliation

Inorganic metal halide perovskites such as CsPbI₃ are promising for high-performance, reproducible, and robust solar cells. However, inorganic perovskites are sensitive to humidity, which causes the transformation from the black phase to the yellow δ, non-perovskite phase. Such phase instability has been a significant challenge to long-term operational stability. Here, a surface dimensionality reduction strategy is reported, using 2-(4-aminophenyl)ethylamine cation to construct a Dion–Jacobson 2D phase that covers the surface of the 3D inorganic perovskite structure. The Dion–Jacobson layer mainly grows at the grain boundaries of the perovskite, effectively passivating surface defects and providing favourable interfacial charge transfer. The resulting inorganic perovskite films exhibit excellent humidity resistance when submerged in an aqueous solution (isopropanol:water = 4:1 v/v) and exposed to a 50% humidity air atmosphere. The Dion–Jacobson 2D/3D inorganic perovskite solar cell (PSC) achieves a power conversion efficiency (PCE) of 19.5% with a V_oc of 1.197 eV. It retains 83% of its initial PCE after 1260 h of maximum power point tracking under 1.2 sun illumination. The work demonstrates an effective way for stabilizing efficient inorganic perovskite solar cells.

中文翻译：

具有二维 Dion-Jacobson 钝化层的无机钙钛矿太阳能电池的稳定性

无机金属卤化物钙钛矿（例如 CsPbI ₃）有望用于高性能、可重复且坚固的太阳能电池。然而，无机钙钛矿对湿度敏感，这会导致黑色相转变为黄色δ非钙钛矿相。这种相位不稳定对长期运行稳定性构成了重大挑战。在此，报道了一种表面降维策略，使用 2-(4-氨基苯基)乙胺阳离子构建覆盖 3D 无机钙钛矿结构表面的 Dion-Jacobson 2D 相。Dion-Jacobson层主要生长在钙钛矿的晶界，有效钝化表面缺陷并提供有利的界面电荷转移。当浸入水溶液（异丙醇：水= 4：1 v/v）并暴露于50％湿度的空气气氛中时，所得无机钙钛矿薄膜表现出优异的耐湿性。Dion-Jacobson 2D/3D 无机钙钛矿太阳能电池 (PSC) 的功率转换效率 (PCE) 为 19.5%，V _oc为 1.197 eV。在 1.2 太阳光照下进行 1260 小时的最大功率点跟踪后，它保留了 83% 的初始 PCE。这项工作展示了一种稳定高效无机钙钛矿太阳能电池的有效方法。

更新日期：2023-07-18

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