亚稳的 Dion-Jacobson 2D 结构使钙钛矿太阳能电池具有高效率和稳定性。
Metastable Dion-Jacobson 2D structure enables efficient and stable perovskite solar cells.
机构信息
Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO 80401, USA.
Department of Physics and Astronomy, University of Toledo, Toledo, OH 43606, USA.
出版信息
Science. 2022 Jan 7;375(6576):71-76. doi: 10.1126/science.abj2637. Epub 2021 Nov 25.
The performance of three-dimensional (3D) organic-inorganic halide perovskite solar cells (PSCs) can be enhanced through surface treatment with 2D layered perovskites that have efficient charge transport. We maximized hole transport across the layers of a metastable Dion-Jacobson (DJ) 2D perovskite that tuned the orientational arrangements of asymmetric bulky organic molecules. The reduced energy barrier for hole transport increased out-of-plane transport rates by a factor of 4 to 5, and the power conversion efficiency (PCE) for the 2D PSC was 4.9%. With the metastable DJ 2D surface layer, the PCE of three common 3D PSCs was enhanced by approximately 12 to 16% and could reach approximately 24.7%. For a triple-cation–mixed-halide PSC, 90% of the initial PCE was retained after 1000 hours of 1-sun operation at ~40°C in nitrogen.
通过用具有高效电荷传输性能的二维层状钙钛矿对三维（3D）有机-无机卤化物钙钛矿太阳能电池（PSCs）进行表面处理，可以提高其性能。我们通过调整不对称大体积有机分子的取向排列，最大限度地提高了亚稳 Dion-Jacobson（DJ）二维钙钛矿层之间的空穴传输。空穴传输的能量势垒降低，使面外传输速率提高了 4 到 5 倍，二维钙钛矿太阳能电池的功率转换效率（PCE）达到了 4.9%。通过使用亚稳 DJ 二维表面层，三种常见 3D PSCs 的 PCE 提高了约 12%至 16%，可达到约 24.7%。对于三阳离子混合卤化物 PSC，在氮气中约 40°C 的 1 个太阳光照下运行 1000 小时后，初始 PCE 的 90%得以保留。
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