Huang Lei, Lou Yan-Hui, Wang Zhao-Kui
Institute of Functional Nano and Soft Materials (FUNSOM), Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, China.
College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou, 215006, China.
Small. 2023 Sep;19(38):e2302585. doi: 10.1002/smll.202302585. Epub 2023 May 17.
Owing to the merits of low cost and high power conversion efficiency (PCE), perovskite solar cells (PSCs) have become the best candidate to replace the commonly used silicon solar cells. However, PSCs have been slow to enter the market for a number of reasons, including poor stability, high toxicity, and rigorous preparation process. Passivation strategies including surface passivation and bulk passivation have been successfully applied to improve the device performance of PSCs. The passivation of the defects at the buried interface, which is regarded as a key strategy to breakthrough the device efficiency and stability of PSCs in the future, is ongoing with challenge. Herein, in detail the recent passivation of the buried interface is introduced from three aspects: perovskite layer, buried interlayer, and transport layer. The passivation effect of the buried interface is clearly demonstrated through three categories of salts, organics, and 2D materials. In addition, the transport layer is classified into electron transport layer (ETL) and hole transport layer (HTL). These classifications can help to have a clear understanding of substances which generate passivating effect and guide the continuous promotion of the follow-up buried interface passivating work.
由于具有低成本和高功率转换效率（PCE）的优点，钙钛矿太阳能电池（PSC）已成为取代常用硅太阳能电池的最佳候选者。然而，由于多种原因，包括稳定性差、毒性高和制备过程严格，PSC进入市场的速度一直较慢。包括表面钝化和体相钝化在内的钝化策略已成功应用于提高PSC的器件性能。对掩埋界面处缺陷的钝化被视为未来突破PSC器件效率和稳定性的关键策略，但仍面临挑战。在此，从钙钛矿层、掩埋中间层和传输层三个方面详细介绍了最近对掩埋界面的钝化。通过盐、有机物和二维材料三类物质清楚地展示了掩埋界面的钝化效果。此外，传输层分为电子传输层（ETL）和空穴传输层（HTL）。这些分类有助于清晰地了解产生钝化效果的物质，并指导后续掩埋界面钝化工作的持续推进。
