Reactive Inhibition Strategy for Triple-cation Mixed-halide Perovskite Ink with Prolonged Shelf-life,Advanced Energy Materials

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Reactive Inhibition Strategy for Triple-cation Mixed-halide Perovskite Ink with Prolonged Shelf-life
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2022-06-09 , DOI: 10.1002/aenm.202200650
Zongcai Li ₁ , Zhi Xing ₁ , Haibin Peng ₂ , Xiangchuan Meng _{1,

3} , Dengxue Li ₂ , Lu Huang ₁ , Xiaotian Hu _{1,

4} , Ting Hu ₂ , Yiwang Chen _{1,

3}

Affiliation

Solution processing of perovskite solar cells (PSCs) is highly promising for the high-throughput production of cost-effective devices. Although PSCs have achieved great advances in power conversion efficiency, challenges still remain in the reproducibility of high-quality perovskite thin film with simultaneously improved precursor solution stability. Here, a reactive inhibition strategy by introducing diethyl (hydroxymethyl) phosphonate (DHP) in perovskite precursor solution is successfully employed to improve the stability of precursor solution and the performance of corresponding device. DHP inhibits the reactivity of the iodide and formamidinium ions through multiple chemical bonds, ensuring the stability of the precursor solution. In addition, due to chelation interaction of Pb²⁺ with the oxygen of PO in DHP, the DHP in the perovskite film improves the film quality with desired stoichiometry by reducing the defects and the content of lead iodide. The DHP-doped precursor solution and corresponding devices show excellent performance reproducibility and super stability under ambient conditions for more than 50 days, which illustrates the commercial feasibility for scalable fabrication.

中文翻译：

延长保质期的三阳离子混合卤化物钙钛矿油墨的反应抑制策略

钙钛矿太阳能电池（PSC）的溶液处理对于高通量生产具有成本效益的设备非常有前景。尽管 PSC 在功率转换效率方面取得了巨大进步，但在高质量钙钛矿薄膜的再现性和同时提高前体溶液稳定性方面仍然存在挑战。在这里，通过在钙钛矿前驱体溶液中引入（羟甲基）膦酸二乙酯（DHP）的反应抑制策略成功地提高了前驱体溶液的稳定性和相应器件的性能。DHP通过多个化学键抑制碘离子和甲脒离子的反应性，保证了前驱体溶液的稳定性。此外，由于 Pb ^{2+的螯合相互作用}使用 DHP 中 PO 的氧，钙钛矿薄膜中的 DHP 通过减少缺陷和碘化铅的含量以所需的化学计量提高薄膜质量。DHP 掺杂的前驱体溶液和相应的器件在环境条件下 50 天以上表现出优异的性能再现性和超强稳定性，这说明了可扩展制造的商业可行性。

更新日期：2022-06-09

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