Fabrication of Efficient Formamidinium Tin Iodide Perovskite Solar Cells through SnF2–Pyrazine Complex,Journal of the American Chemical Society

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Fabrication of Efficient Formamidinium Tin Iodide Perovskite Solar Cells through SnF2–Pyrazine Complex
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2016-03-17 , DOI: 10.1021/jacs.6b00142
Seon Joo Lee ₁ , Seong Sik Shin _{1,

2} , Young Chan Kim ₁ , Dasom Kim ₃ , Tae Kyu Ahn ₃ , Jun Hong Noh ₁ , Jangwon Seo ₁ , Sang Il Seok _{1,

2}

Affiliation

To fabricate efficient formamidinium tin iodide (FASnI3) perovskite solar cells (PSCs), it is essential to deposit uniform and dense perovskite layers and reduce Sn(4+) content. Here we used solvent-engineering and nonsolvent dripping process with SnF2 as an inhibitor of Sn(4+). However, excess SnF2 induces phase separation on the surface of the perovskite film. In this work, we report the homogeneous dispersion of SnF2 via the formation of the SnF2-pyrazine complex. Consequently, we fabricated FASnI3 PSCs with high reproducibility, achieving a high power conversion efficiency of 4.8%. Furthermore, the encapsulated device showed a stable performance for over 100 days, maintaining 98% of its initial efficiency.

中文翻译：

通过 SnF2-吡嗪配合物制备高效的甲脒锡碘化物钙钛矿太阳能电池

为了制造高效的碘化甲脒锡 (FASnI3) 钙钛矿太阳能电池 (PSC)，必须沉积均匀致密的钙钛矿层并降低 Sn(4+) 含量。在这里，我们使用溶剂工程和非溶剂滴注工艺，将 SnF2 作为 Sn(4+) 的抑制剂。然而，过量的 SnF2 会导致钙钛矿薄膜表面发生相分离。在这项工作中，我们通过形成 SnF2-吡嗪络合物报告了 SnF2 的均匀分散。因此，我们制造了具有高重现性的 FASnI3 PSC，实现了 4.8% 的高功率转换效率。此外，封装后的器件在 100 多天的时间内表现出稳定的性能，保持了其初始效率的 98%。

更新日期：2016-03-17

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