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arXiv 2304.12901cond-mat.mtrl-sciphysics.app-ph
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碘化铯对富 FAPbI3 钙钛矿的表面钝化优于体相掺入

Surface passivation of FAPbI3-rich perovskite with caesium iodide outperforms bulk incorporation

Thomas P. Baumeler, Essa A. Alharbi, George Kakavelakis, George C. Fish, Mubarak T. Aldosari, Miqad S. Albishi, Lukas Pfeifer, Brian I. Carlsen, Jun-Ho Yum, Abd… 展开作者

Thomas P. Baumeler, Essa A. Alharbi, George Kakavelakis, George C. Fish, Mubarak T. Aldosari, Miqad S. Albishi, Lukas Pfeifer, Brian I. Carlsen, Jun-Ho Yum, Abdullah S. Alharbi, Mounir D. Mensi, Jing Gao, Felix T. Eickemeyer, Kevin Sivula, Jacques-Edouard Moser, Shaik M. Zakeeruddin, Michael Graetzel

AI总结:

该研究将 CsI 作为富 FAPbI3 钙钛矿的表面钝化剂而非体相添加剂,实现 24.1% PCE,并显著提升光电性能与 600 h 运行稳定性。

摘要:

金属卤化物钙钛矿(MHP)的效率实现了令人瞩目的提升,最高达到 25.7%,如今已可与传统光伏技术竞争。在本研究中,我们将最常用于稳定 FAPbI3 的阳离子 CsX 和 RbX 排除在钙钛矿薄膜体相之外,并将其作为钝化剂施加于表面。经过大量器件优化,在采用 CsI 钝化后,器件实现了 24.1% 的功率转换效率(PCE)和 82.2% 的高填充因子(FF)。我们利用 X 射线衍射(XRD)、角分辨 X 射线光电子能谱(ARXPS)、开尔文探针力显微镜(KPFM)、时间分辨光致发光(TRPL)、光致发光量子产率(PLQY)和电吸收光谱(TREAS),深入研究了 CsI 钝化对结构和光电性质的影响。此外,钝化器件表现出增强的运行稳定性;经 CsI 优化钝化后,在 1 Sun 光照和最大功率点跟踪条件下运行 600 h,器件仍保持约 90% 的初始 PCE。

英文摘要:

Metal halide perovskites (MHPs) have shown an incredible rise in efficiency, reaching as high as 25.7%, which now competes with traditional photovoltaic technologies. Herein, we excluded CsX and RbX, the most commonly used cations to stabilize FAPbI3, from the bulk of perovskite thin films and applied them on the surface, as passivation agents. Extensive device optimization led to a power conversion efficiency (PCE) of 24.1% with a high fill factor (FF) of 82.2% upon passivation with CsI. We investigated in-depth the effect of CsI passivation on structural and optoelectronic properties using X-ray diffraction (XRD), angle resolved X-ray photoelectron spectroscopy (ARXPS), Kelvin Probe Force (KPFM) microscopy, time-resolved photoluminescence (TRPL), photoluminescence quantum yield (PLQY) and electroabsorption spectroscopy (TREAS). Furthermore, passivated devices exhibit enhanced operational stability, with optimized passivation with CsI leading to a retention of ~90% of initial PCE under 1 Sun illumination with maximum power point tracking for 600 h.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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