A Universal Surface Treatment for p-i-n Perovskite Solar Cells
A Universal Surface Treatment for p-i-n Perovskite Solar Cells
复制标题
DOI：
10.1021/acsami.2c15989
复制
发表时间：
2022-12-07
影响因子：
9.5
通讯作者：
Wakamiya, Atsushi
中科院分区：
文献类型：
--
作者：
Hu, Shuaifeng;Pascual, Jorge;Wakamiya, Atsushi
钙钛矿界面对光伏器件的最终性能有重要影响。通过降低缺陷密度或改善与电荷传输材料的接触来优化它们是进一步提高钙钛矿太阳能电池效率和稳定性的关键。从各种成功的尝试中可以看出，倒置（p-i-n）设备在这里特别受益。然而，每一个报道的策略都是适应特定的细胞结构和组成，影响了其他研究人员的稳健性和适用性。在这项工作中，我们提出了用二碘化乙二铵（EDAI2）对p-i-n器件进行钙钛矿顶表面后处理的普遍性。为了证明这一点，我们比较了含有不同成分钙钛矿薄膜的器件，即Sn-， Pb-和混合Sn-Pb基器件，分别实现了高达11.4,22.0和22.9%的效率。对EDAI2厚度的仔细优化表明，基于pb和sn的器件的公差不同。这种处理的主要好处在开路电压方面是显而易见的，对于某些组合物，可以提高200mv。此外，我们证明，无论成分如何，湿法（旋涂）和干法（热蒸发）都可以成功地应用该处理。这种处理的多功能性使其对工业应用非常有吸引力，因为它可以很容易地适应特定的加工要求。我们提出了一个详细的实验方案，旨在为社区提供一种简单，通用的钙钛矿后处理方法，以可靠地提高设备效率，突出该领域的接口潜力。
Perovskite interfaces critically influence the final performance of the photovoltaic devices. Optimizing them by reducing the defect densities or improving the contact with the charge transporting material is key to further enhance the efficiency and stability of perovskite solar cells. Inverted (p-i-n) devices can particularly benefit here, as evident from various successful attempts. However, every reported strategy is adapted to specific cell structures and compositions, affecting their robustness and applicability by other researchers. In this work, we present the universality of perovskite top surface posttreatment with ethylenediammonium diiodide (EDAI2) for p-i-n devices. To prove it, we compare devices bearing perovskite films of different composition, i.e., Sn-, Pb-, and mixed Sn-Pb-based devices, achieving efficiencies of up to 11.4, 22.0, and 22.9%, respectively. A careful optimization of the EDAI2 thickness indicates a different tolerance for Pb-and Sn-based devices. The main benefit of this treatment is evident in the open-circuit voltage, with enhancements of up to 200 mV for some compositions. In addition, we prove that this treatment can be successfully applied by both wet (spin-coating) and dry (thermal evaporation) methods, regardless of the composition. The versatility of this treatment makes it highly appealing for industrial application, as it can be easily adapted to specific processing requirements. We present a detailed experimental protocol, aiming to provide the community with an easy, universal perovskite post-treatment method for reliably improving the device efficiency, highlighting the potential of interfaces for the field.