Li Peizhou, Cao Xiangrong, Li Jingrui, Jiao Bo, Hou Xun, Hao Feng, Ning Zhijun, Bian Zuqiang, Xi Jun, Ding Liming, Wu Zhaoxin, Dong Hua
Key Laboratory for Physical Electronics and Devices (MoE), Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of China.
School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, People's Republic of China.
Nanomicro Lett. 2023 Jul 3;15(1):167. doi: 10.1007/s40820-023-01143-0.
Perovskite solar cells (PSCs) have attracted aggressive attention in the photovoltaic field in light of the rapid increasing power conversion efficiency. However, their large-scale application and commercialization are limited by the toxicity issue of lead (Pb). Among all the lead-free perovskites, tin (Sn)-based perovskites have shown potential due to their low toxicity, ideal bandgap structure, high carrier mobility, and long hot carrier lifetime. Great progress of Sn-based PSCs has been realized in recent years, and the certified efficiency has now reached over 14%. Nevertheless, this record still falls far behind the theoretical calculations. This is likely due to the uncontrolled nucleation states and pronounced Sn (IV) vacancies. With insights into the methodologies resolving both issues, ligand engineering-assisted perovskite film fabrication dictates the state-of-the-art Sn-based PSCs. Herein, we summarize the role of ligand engineering during each state of film fabrication, ranging from the starting precursors to the ending fabricated bulks. The incorporation of ligands to suppress Sn oxidation, passivate bulk defects, optimize crystal orientation, and improve stability is discussed, respectively. Finally, the remained challenges and perspectives toward advancing the performance of Sn-based PSCs are presented. We expect this review can draw a clear roadmap to facilitate Sn-based PSCs via ligand engineering.
鉴于功率转换效率的迅速提高，钙钛矿太阳能电池（PSCs）在光伏领域引起了广泛关注。然而，它们的大规模应用和商业化受到铅（Pb）毒性问题的限制。在所有无铅钙钛矿中，锡（Sn）基钙钛矿因其低毒性、理想的带隙结构、高载流子迁移率和长的热载流子寿命而显示出潜力。近年来，锡基PSCs取得了很大进展，目前认证效率已超过14%。然而，这一记录仍远低于理论计算值。这可能是由于成核状态不受控制和明显的Sn（IV）空位所致。通过深入了解解决这两个问题的方法，配体工程辅助的钙钛矿薄膜制备决定了目前最先进的锡基PSCs。在此，我们总结了配体工程在薄膜制备的每个阶段所起的作用，从起始前驱体到最终制备的块状材料。分别讨论了引入配体以抑制Sn氧化、钝化体缺陷、优化晶体取向和提高稳定性的情况。最后，提出了提高锡基PSCs性能仍面临的挑战和前景。我们希望这篇综述能够绘制出一条清晰的路线图，通过配体工程促进锡基PSCs的发展。
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