Howlader Ashraful Hossain, Uddin Ashraf
School of Photovoltaic and Renewable Energy Engineering, UNSW Sydney, Sydney, NSW 2033, Australia.
Nanomaterials (Basel). 2025 Jun 6;15(12):876. doi: 10.3390/nano15120876.
Three-dimensional/two-dimensional bilayered perovskite solar cells have recently become popular for ensuring high efficiency and promising long-term stability. The 3D/2D bilayered perovskite thin film is mainly used in regular (n-i-p)-type perovskite solar cells. In this review, our discussion also focuses on the regular kind of perovskite solar cells. In a 3D/2D bilayered perovskite thin film, the 2D perovskite layer works as a capping layer on top of the 3D perovskite thin film. The 2D capping layer heals the surface and bulk defects of the 3D perovskite thin film. The 2D layer interfaces between the 3D perovskite and hole transport layers. The 2D layer also acts as a shield against moisture and heat. This layer also inhibits ion migration between layers (3D perovskite and back contact). This review lists and investigates different organic precursors deposited as a 2D capping layer on top of the 3D perovskite thin film to explore their impact on the solar cell's efficiency and stability. The possible challenges and remedies in growing a 2D capping layer on top of the 3D perovskite thin film are also discussed.
三维/二维双层钙钛矿太阳能电池最近因能确保高效率和具有良好的长期稳定性而受到欢迎。三维/二维双层钙钛矿薄膜主要用于常规的（n-i-p）型钙钛矿太阳能电池。在本综述中，我们的讨论也聚焦于常规类型的钙钛矿太阳能电池。在三维/二维双层钙钛矿薄膜中，二维钙钛矿层充当三维钙钛矿薄膜顶部的覆盖层。二维覆盖层修复三维钙钛矿薄膜的表面和体缺陷。二维层位于三维钙钛矿和空穴传输层之间的界面处。二维层还起到防潮和隔热的作用。该层还抑制层间（三维钙钛矿和背接触）的离子迁移。本综述列出并研究了作为二维覆盖层沉积在三维钙钛矿薄膜顶部的不同有机前驱体，以探讨它们对太阳能电池效率和稳定性的影响。还讨论了在三维钙钛矿薄膜顶部生长二维覆盖层时可能面临的挑战和解决方法。
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