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首页> 外文期刊>Advanced Functional Materials >δ-CsPbI_3 Intermediate Phase Growth Assisted Sequential Deposition Boosts Stable and High-Efficiency Triple Cation Perovskite Solar Cells
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δ-CsPbI_3 Intermediate Phase Growth Assisted Sequential Deposition Boosts Stable and High-Efficiency Triple Cation Perovskite Solar Cells

机译：δ-CsPbI_3中间相生长辅助顺序沉积可促进稳定高效的三阳离子钙钛矿太阳能电池

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摘要

Cs/FA/MA triple cation perovskite films have been well developed in the antisolvent dripping method, attributable to its outstanding photovoltaic and stability performances. However, a facile and effective strategy is still lacking for fabricating high-quality large-grain triple cation perovskite films via sequential deposition method a, which is one of the key technologies for high efficiency perovskite solar cells. To address this issue, a delta-CsPbI3 intermediate phase growth (CsPbI3-IPG) assisted sequential deposition method is demonstrated for the first time. The approach not only achieves incorporation of controllable cesium into (FAPbI(3))(1-x)(MAPbBr(3))(x) perovskite, but also enlarges the perovskite grains, manipulates the crystallization, modulates the bandgap, and improves the stability of final perovskite films. The photovoltaic performances of the devices based on these Cs/FA/MA perovskite films with various amounts of the delta-CsPbI3 intermediate phase are investigated systematically. Benefiting from moderate cesium incorporation and intermediate phase-assisted grain growth, the optimized Cs/FA/MA perovskite solar cells exhibit a significantly improved power conversion efficiency and operational stability of unencapsulated devices. This facile strategy provides new insights into the compositional engineering of triple or quadruple cation perovskite materials with enlarged grains and superior stability via a sequential deposition method.
机译：Cs / FA / MA三阳离子钙钛矿薄膜由于其出色的光电性能和稳定性能，在抗溶剂滴落法中得到了很好的发展。然而，仍然缺乏通过顺序沉积方法a制造高质量大晶粒三阳离子钙钛矿薄膜的简便有效的策略，这是高效钙钛矿太阳能电池的关键技术之一。为了解决这个问题，首次展示了δ-CsPbI3中间相生长（CsPbI3-IPG）辅助顺序沉积方法。该方法不仅实现了将可控铯掺入（FAPbI（3））（1-x）（MAPbBr（3））（x）钙钛矿中，还扩大了钙钛矿晶粒，操纵了结晶，调节了带隙并改善了最终钙钛矿薄膜的稳定性。系统地研究了基于这些Cs / FA / MA钙钛矿薄膜以及不同数量的delta-CsPbI3中间相的器件的光伏性能。得益于适度的铯掺入和中间相辅助的晶粒长大，优化的Cs / FA / MA钙钛矿型太阳能电池表现出明显提高的功率转换效率和未封装器件的操作稳定性。这种简便的策略通过顺序沉积方法，为具有更大晶粒和更高稳定性的三或四重阳离子钙钛矿材料的成分工程提供了新的见识。

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