效率超过 13.6% 的无机 CsSnI3 Perovskite 太阳能电池

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2024-11-14 DOI:10.1021/acsenergylett.4c02742

Haixuan Yu, Zhiguo Zhang, Hongliang Dong, Xiongjie Li, Zhirong Liu, Junyi Huang, Yongqing Fu, Yan Shen, Mingkui Wang

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引用次数: 0

摘要

由于 Sn2+ 的路易斯酸度较高，制备高质量的 CsSnI3 薄膜是一项重大挑战。为了解决这一关键问题，我们在此提出了一种假卤化物阴离子合金化工艺，以调节无机 CsSnI3 包晶的结晶，实现微米级的大晶粒尺寸。假卤化物阴离子的引入通过形成中间产物改变了相变途径，从而减缓了 CsSnI3 的结晶速度。由于 HCOO- 阴离子和 Sn2+ 阳离子之间的强键作用，CsSnI3 晶格中的 HCOO- 替代合金进一步提高了 Sn2+ 的抗氧化性。所制备的基于 CsSnI3 的平面透辉石太阳能电池采用倒置结构，有源面积为 4.05 mm2，在 AM 1.5 太阳辐照（100 mW cm-2）条件下的功率转换效率为 13.68%，是所报道的基于 CsSnI3 的无机透辉石电池中最好的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Inorganic CsSnI3 Perovskite Solar Cells with an Efficiency above 13.6%

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Inorganic CsSnI3 Perovskite Solar Cells with an Efficiency above 13.6%

Due to the high Lewis acidity of Sn²⁺, it is a major challenge to prepare high-quality CsSnI₃ films. To solve this critical problem, here we propose a pseudohalide anion alloying process to regulate the crystallization of inorganic CsSnI₃ perovskite and achieve large grain sizes in the micron range. The introduction of a pseudohalide anion changes the phase transition pathways through the formation of intermediates, thereby slowing the rate of CsSnI₃ crystallization. The substitutional alloying of HCOO^– in the CsSnI₃ crystal lattice further improves the oxidation resistance of Sn²⁺ due to the strong bonding between the HCOO^– anions and Sn²⁺ cations. The fabricated CsSnI₃-based planar perovskite solar cell with an inverted configuration and active area of 4.05 mm² exhibits certified power conversion efficiency of 13.68% at AM 1.5 solar irradiation (100 mW cm^–2), which is among the best reported for CsSnI₃-based inorganic perovskite cells.

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.