通过掺入铷使铯分布均匀化，可以实现效率超过22的纯碘化物1.67eV带隙钙钛矿太阳能电池
Homogenizing Cesium Distribution via Rubidium Incorporation Enables Pure-Iodide 1.67 eV Bandgap Perovskite Solar Cells with Efficiency Exceeding 22.
摘要(中文译文)
富含铯的多阳离子纯碘宽带隙钙钛矿材料具有优异的光稳定性，是稳定叠层太阳能电池的有前景候选材料。然而，这些富铯钙钛矿往往存在垂直方向的阳离子不均匀性，从而损害器件性能和运行稳定性。在此，我们报道掺入铷（Rb）可加速CsDMAMAFA钙钛矿的相变并促进其更好地结晶，从而确保Cs的垂直分布更加均匀。此外，Rb的掺入缓解了晶格应变，减少了碘空位缺陷，并优化了界面能级。结果，Rb掺杂的纯碘宽带隙钙钛矿太阳能电池在1.67 eV带隙下实现了21.62%的效率，通过额外的1,3-二氨基丙烷二氢碘酸盐（PDAI）表面处理可进一步提高至22.51%。Rb掺杂器件还表现出增强的光稳定性，即使在未封装的情况下，在ISOS-L-1条件（环境空气，23 ± 2 °C）下400小时后仍保持初始效率的88%。这项工作为高效稳定的纯碘宽带隙钙钛矿太阳能电池提供了一条简单有效的途径。
Abstract
Cs-rich multiple-cation pure-iodide wide-bandgap perovskite materials with excellent photostability are promising candidates for stable tandem solar cells. However, these Cs-rich perovskites often suffer from vertical cation inhomogeneity, which compromises device performance and operational stability. Herein, we report that incorporating rubidium (Rb) accelerated the phase transition and promoted better crystallization of the CsDMAMAFA perovskite, thereby ensuring a more uniform vertical distribution of Cs. In addition, Rb incorporation relieved lattice strain, reduced iodide-vacancy defects, and optimized the interfacial energy levels. As a result, the Rb-doped pure-iodide wide-bandgap perovskite solar cells achieved an efficiency of 21.62% with a bandgap of 1.67 eV, which can be further increased to 22.51% via an additional 1,3-diaminopropane dihydroiodide (PDAI) surface treatment. The Rb-doped devices also exhibited enhanced photostability, maintaining 88% of the initial efficiency after 400 h under ISOS-L-1 conditions (ambient air, 23 ± 2 °C), even without encapsulation. This work provides a simple and effective route to efficient and stable pure-iodide wide-bandgap perovskite solar cells.
如何引用
AMA
Xiangqing Zhou, Shaotong Wang, Yusheng Li, Biao Shi, Pengyang Wang, Xiaodan Zhang. Homogenizing Cesium Distribution via Rubidium Incorporation Enables Pure-Iodide 1.67 eV Bandgap Perovskite Solar Cells with Efficiency Exceeding 22.. ACS nano. 2026; doi:10.1021/acsnano.6c04084.
APA
Xiangqing Zhou, Shaotong Wang, Yusheng Li, Biao Shi, Pengyang Wang, Xiaodan Zhang (2026). Homogenizing Cesium Distribution via Rubidium Incorporation Enables Pure-Iodide 1.67 eV Bandgap Perovskite Solar Cells with Efficiency Exceeding 22.. ACS nano. https://doi.org/10.1021/acsnano.6c04084
GB/T 7714
Xiangqing Zhou, Shaotong Wang, Yusheng Li, Biao Shi, Pengyang Wang, Xiaodan Zhang. Homogenizing Cesium Distribution via Rubidium Incorporation Enables Pure-Iodide 1.67 eV Bandgap Perovskite Solar Cells with Efficiency Exceeding 22.[J]. ACS nano, 2026 doi:10.1021/acsnano.6c04084.
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