Engineering ligand reactivity enables high-temperature operation of stable perovskite solar cells-猫眼课题宝

DOI：

10.1126/science.adi4107

发表时间：

2023-07

期刊：

Science

影响因子：

56.9

通讯作者：

中科院分区：

综合性期刊1区

文献类型：

作者：

So Min Park;Mingyang Wei;Jian Xu;H. Atapattu;F. Eickemeyer;Kasra Darabi;Luke Grater;Yi Yang;Cheng Liu;S. Teale;Bin Chen;Hao Chen;Tonghui Wang;Lewei Zeng;Aidan Maxwell;Zaiwei Wang;K. R. Rao;Zhuoyun Cai;S. Zakeeruddin;Jonathan T. Pham;C. Risko;A. Amassian;M. Kanatzidis;K. Graham;M. Grätzel;E. Sargent

由界面二维和三维异质结构组成的钙钛矿太阳能电池（PSC），结合了铵配体嵌入，使得在性能与稳定性相结合的目标方面取得了快速进展。然而，随着该领域不断寻求更高的耐用性，需要额外的工具来避免渐进的配体嵌入，以最大限度地减少高温下的降解。我们使用与大部分钙钛矿不发生反应的铵配体，并研究了系统地改变配体分子结构的库。我们发现氟化苯胺提供界面钝化作用，同时最大限度地减少与钙钛矿的反应性。使用这种方法，我们报告了倒置结构 PSC 的经认证准稳态功率转换效率为 24.09%。在 85°C 和 50% 相对湿度下运行的封装器件中，我们记录了 1 太阳光照下最大功率点的 1560 小时 T85。编辑摘要通过添加铵配体来形成二维钙钛矿覆盖层，可以提高三维钙钛矿太阳能电池的热稳定性，但此类配体很容易嵌入到本体中。帕克等人。结果表明，由于铵基附近的空间位阻，最小的芳香族配体苯胺与三维钙钛矿的配体反应性最低，并且该配体的氟化衍生物创建了坚固的界面结构。在 85°C 和 50% 相对湿度下，在最大功率点运行约 1600 小时后，封装太阳能电池仍保持 85% 的功率转换效率（约 20%）。 —PDS 抑制铵配体嵌入可稳定钙钛矿太阳能电池在高温下的界面结构。

Perovskite solar cells (PSCs) consisting of interfacial two- and three-dimensional heterostructures that incorporate ammonium ligand intercalation have enabled rapid progress toward the goal of uniting performance with stability. However, as the field continues to seek ever-higher durability, additional tools that avoid progressive ligand intercalation are needed to minimize degradation at high temperatures. We used ammonium ligands that are nonreactive with the bulk of perovskites and investigated a library that varies ligand molecular structure systematically. We found that fluorinated aniliniums offer interfacial passivation and simultaneously minimize reactivity with perovskites. Using this approach, we report a certified quasi–steady-state power-conversion efficiency of 24.09% for inverted-structure PSCs. In an encapsulated device operating at 85°C and 50% relative humidity, we document a 1560-hour T85 at maximum power point under 1-sun illumination. Description Editor’s summary The thermal stability of three-dimensional perovskite solar cells can be improved by adding ammonium ligands that create a two-dimensional perovskite capping layers, but such ligands are prone to intercalation into the bulk. Park et al. showed that the smallest aromatic ligand, anilinium, had the lowest ligand reactivity with three-dimensional perovskites because of steric hindrance near the ammonium group, and a fluorinated derivative of this ligand created a robust interface structure. Encapsulated solar cells maintained 85% of their power conversion efficiency of about 20% at 85°C and 50% relative humidity after about 1600 hours of maximum power point operation. —PDS Suppressing ammonium ligand intercalation stabilizes the interface structure of perovskite solar cells at high temperatures.

Engineering ligand reactivity enables high-temperature operation of stable perovskite solar cells

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