Delgado-Rodríguez Silvia, Jaldo Serrano Eva, Elshorbagy Mahmoud H, Alda Javier, Del Pozo Gonzalo, Cuadrado Alexander
Departamento de Tecnología Electrónica, Universidad Rey Juan Carlos, 28933 Madrid, Spain.
Physics Department, Faculty of Science, Minia University, El Minia 61519, Egypt.
Nanomaterials (Basel). 2024 Sep 30;14(19):1582. doi: 10.3390/nano14191582.
Perovskite solar cells are considered to be one of the most promising solar cell designs in terms of photovoltaic efficiency. However, their practical deployment is strongly affected by their short lifetimes, mostly caused by environmental conditions and UV degradation. In this contribution, we present a metasurface made of silver nanoparticles used as a UV filter on a perovskite solar cell. The UV-blocking layer was fabricated and morphologically and compositionally analyzed. Its optical response, in terms of optical transmission, was also experimentally measured. These results were compared with simulations made through the use of a well-proven computational electromagnetism model. After analyzing the discrepancies between the experimental and simulated results and checking those obtained from electron beam microscopy and electron dispersion spectroscopy, we could see that a residue from fabrication, sodium citrate, strongly modified the optical response of the system, generating a redshift of about 50 nm. Then, we proposed and simulated the optical behavior of core-shell nanoparticles made of silver and silica. The calculated spectral absorption at the active perovskite layer shows how the appropriate selection of the geometrical parameters of these core-shell particles is able to tune the absorption at the active layer by removing a significant portion of the UV band and reducing the absorption of the active layer from 90% to 5% at a resonance wavelength of 403 nm.
就光伏效率而言，钙钛矿太阳能电池被认为是最具前景的太阳能电池设计之一。然而，它们的实际应用受到其短寿命的严重影响，这主要是由环境条件和紫外线降解造成的。在本论文中，我们展示了一种由银纳米颗粒制成的超表面，用作钙钛矿太阳能电池上的紫外线滤光片。制备了紫外线阻挡层并对其进行了形态和成分分析。还通过实验测量了其在光传输方面的光学响应。将这些结果与使用经过充分验证的计算电磁模型进行的模拟结果进行了比较。在分析了实验结果与模拟结果之间的差异，并检查了从电子束显微镜和电子能谱获得的结果后，我们发现制造过程中的残留物柠檬酸钠强烈改变了系统的光学响应，产生了约50nm的红移。然后，我们提出并模拟了由银和二氧化硅制成的核壳纳米颗粒的光学行为。计算得到的活性钙钛矿层的光谱吸收表明，通过去除大部分紫外波段并在403nm的共振波长下将活性层的吸收从90%降低到5%，这些核壳颗粒几何参数的适当选择能够调节活性层的吸收。
