Vacuum Deposited Triple‐Cation Mixed‐Halide Perovskite Solar Cells,Advanced Energy Materials

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Vacuum Deposited Triple‐Cation Mixed‐Halide Perovskite Solar Cells
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-02-28 , DOI: 10.1002/aenm.201703506
Lidón Gil-Escrig ₁ , Cristina Momblona ₁ , Maria-Grazia La-Placa ₁ , Pablo P. Boix ₁ , Michele Sessolo ₁ , Henk J. Bolink ₁

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Hybrid lead halide perovskites are promising materials for future photovoltaics applications. Their spectral response can be readily tuned by controlling the halide composition, while their stability is strongly dependent on the film morphology and on the type of organic cation used. Mixed cation and mixed halide systems have led to the most efficient and stable perovskite solar cells reported, so far they are prepared exclusively by solution‐processing. This might be due to the technical difficulties associated with the vacuum deposition from multiple thermal sources, requiring a high level of control over the deposition rate of each precursor during the film formation. In this report, thermal vacuum deposition with multiple sources (3 and 4) is used to prepare for the first time, multications/anions perovskite compounds. These thin‐film absorbers are implemented into fully vacuum deposited solar cells using doped organic semiconductors. A maximum power conversion efficiency of 16% is obtained, with promising device stability. The importance of the control over the film morphology is highlighted, which differs substantially when these compounds are vacuum processed. Avenues to improve the morphology and hence the performance of fully vacuum processed multications/anions perovskite solar cells are proposed.

中文翻译：

真空沉积三阳离子混合卤化物钙钛矿太阳能电池

杂化卤化钙钛矿是未来光伏应用的有前途的材料。通过控制卤化物的组成可以很容易地调节它们的光谱响应，而它们的稳定性在很大程度上取决于薄膜的形态和所用有机阳离子的类型。混合阳离子和混合卤化物系统已导致最高效，最稳定的钙钛矿太阳能电池的报道，到目前为止，它们仅通过溶液处理来制备。这可能是由于与来自多个热源的真空沉积相关的技术难题，需要在成膜过程中对每个前体的沉积速率进行高度控制。在本报告中，具有多种来源（3和4）的热真空沉积首次用于制备多阳离子/阴离子钙钛矿化合物。这些薄膜吸收剂使用掺杂的有机半导体实现到完全真空沉积的太阳能电池中。获得了16％的最大功率转换效率，并具有稳定的器件稳定性。强调了控制膜形态的重要性，这在真空处理这些化合物时有很大不同。提出了改善形态并因此改善全真空处理的多阳离子/阴离子钙钛矿型太阳能电池的性能的途径。

更新日期：2018-02-28

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