Perylene Monoimide Phosphorus Salt Interfacial Modified Crystallization for Highly Efficient and Stable Perovskite Solar Cells,ACS Applied Materials & Interfaces

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Perylene Monoimide Phosphorus Salt Interfacial Modified Crystallization for Highly Efficient and Stable Perovskite Solar Cells
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-01-23 , DOI: 10.1021/acsami.2c20088
Mengmeng Chen ₁ , Ying Tang ₂ , Ruiping Qin ₁ , Zhenhuang Su ₃ , Feng Yang ₂ , Chaochao Qin ₂ , Jien Yang ₁ , Xiaodan Tang ₁ , Miao Li ₁ , Hairui Liu ₁

Affiliation

Reducing the interfacial defects of perovskite films is key to improving the performance of perovskite solar cells (PSCs). In this study, two kinds of perylene monoimide (PMI) derivative phosphonium bromide salts were designed and used as a multifunctional interface-modified layer in PSCs. These two molecules are inserted between SnO₂ and perovskite to produce a bidirectional passivation effect. The interaction with SnO₂ reduces the oxygen vacancy on the surface of SnO₂ and tunes the energy level of the electron transport layer, making more matches with the perovskite layer. The modified layer can promote the growth of perovskite crystals and reduce the interfacial defects of the perovskite film. Furthermore, the power conversion efficiency (PCE) of PSCs increased from 19.49 to 22.85%, and the open-circuit voltage (V_OC) increased from 1.06 to 1.14 V. At the same time, the PCE of the SnO₂/PMI-TPP-based device remained 88% of the initial PCE after 240 h of continuous illumination. In addition, these two PMI derivatives with a quasi-planar structure can improve the flexibility of flexible PSCs. This study provided a new strategy for the interfacial modification of PSCs and a new insight into the application of flexible PSCs.

中文翻译：

苝单酰亚胺磷盐界面改性结晶用于高效稳定的钙钛矿太阳能电池

减少钙钛矿薄膜的界面缺陷是提高钙钛矿太阳能电池（PSC）性能的关键。在这项研究中，设计了两种苝单酰亚胺 (PMI) 衍生物溴化鏻盐，并将其用作 PSC 中的多功能界面改性层。这两个分子插入到SnO ₂和钙钛矿之间以产生双向钝化作用。_{与SnO 2}的相互作用降低了SnO ₂表面的氧空位并调整电子传输层的能级，使其与钙钛矿层更加匹配。改性层可以促进钙钛矿晶体的生长，减少钙钛矿薄膜的界面缺陷。此外，PSC的功率转换效率（PCE）从19.49提高到22.85%，开路电压（V _OC）从1.06提高到1.14 V。同时，SnO ₂ /PMI-TPP的PCE连续照明 240 小时后，基于器件的 PCE 仍保持在初始 PCE 的 88%。此外，这两种具有准平面结构的 PMI 衍生物可以提高柔性 PSC 的灵活性。该研究为PSCs的界面修饰提供了新的策略，为柔性PSCs的应用提供了新的思路。

更新日期：2023-01-23

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