In Situ Synthesized Low-Dimensional Perovskite for >25% Efficiency Stable MA-Free Perovskite Solar Cells,Advanced Materials

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In Situ Synthesized Low-Dimensional Perovskite for >25% Efficiency Stable MA-Free Perovskite Solar Cells
Advanced Materials ( IF 27.4 ) Pub Date : 2024-03-25 , DOI: 10.1002/adma.202310711
Yong Li ₁ , Yuwei Duan _{1,

2} , Zhike Liu ₁ , Lu Yang ₁ , Hongxiang Li ₃ , Qunping Fan ₄ , Hui Zhou ₁ , Yiqiao Sun ₁ , Meizi Wu ₁ , Xiaodong Ren ₅ , Ningyi Yuan ₆ , Jianning Ding ₆ , Shaoming Yang ₁ , Shengzhong Liu ₁

Affiliation

Developing an additive to effectively regulate the perovskite crystallization kinetics for the optimized optoelectronic properties of perovskite film plays a vital role in obtaining high efficiency and stable perovskite solar cells (PSCs). Herein, a new additive is designed and directly synthesized in perovskite precursor solution by utilizing an addition reaction between but-3-yn-1-amine hydrochloride (BAH) and formamidinium iodide. It is found that its product may control the intermediate precursor phase for regulating perovskite nucleation, leading to advantageous 2D perovskite to induce growth of perovskite along the preferred [001] orientation with not only released lattice strain but also strong interaction with perovskite to passivate its surface defects. By taking advantage of the above synergistic effects, the optimized PSC delivers an efficiency of 25.19% and a high open-circuit voltage (V_OC) of 1.22 V. Additionally, the devices demonstrate good stability, remaining over 90% of their initial efficiencies under ambient atmosphere conditions for 60 days, high temperature of 85 °C for 200 h, or maximum power point tracking for 500 h.

中文翻译：

原位合成低维钙钛矿，用于 >25% 效率稳定的无 MA 钙钛矿太阳能电池

开发一种添加剂来有效调节钙钛矿结晶动力学，以优化钙钛矿薄膜的光电性能，对于获得高效、稳定的钙钛矿太阳能电池（PSC）起着至关重要的作用。在此，通过利用but-3-yn-1-胺盐酸盐（BAH）和甲脒碘化物之间的加成反应，设计并直接在钙钛矿前驱体溶液中合成了一种新的添加剂。研究发现，其产物可以控制中间前体相来调节钙钛矿成核，产生有利的二维钙钛矿，诱导钙钛矿沿优选的[001]取向生长，不仅释放晶格应变，而且与钙钛矿产生强烈的相互作用，钝化其表面缺陷。通过利用上述协同效应，优化后的PSC可实现25.19%的效率和1.22 V的高开路_电压（VOC ）。此外，器件表现出良好的稳定性，在环境大气条件下 60 天，85°C 高温下 200 小时，或最大功率点跟踪 500 小时。

更新日期：2024-03-25

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