Thermodynamically Self‐Healing 1D–3D Hybrid Perovskite Solar Cells,Advanced Energy Materials

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Thermodynamically Self‐Healing 1D–3D Hybrid Perovskite Solar Cells
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-03-14 , DOI: 10.1002/aenm.201703421
Jiandong Fan ₁ , Yunping Ma ₂ , Cuiling Zhang ₂ , Chong Liu ₁ , Wenzhe Li ₁ , Ruud E. I. Schropp ₃ , Yaohua Mai ₁

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Thermal degradation in perovskite solar cells is still an unsettled issue that limits its further development. In this study, 2‐(1H‐pyrazol‐1‐yl)pyridine is introduced into lead halide 3D perovskites, which allows 1D–3D hybrid perovskite materials to be obtained. The heterostructural 1D–3D perovskites are proved to be capable of remarkably prolonging the photoluminescence decay lifetime and suppressing charge carrier recombination in comparison to conventional 3D perovskites. The intrinsic properties of thermodynamically stable yet kinetically labile 1D materials allow the system to alleviate the lattice mismatch and passivate the interface traps of heterojunction region of 1D–3D hybrid perovskites that may occur during the crystal growth process. Importantly, the as‐fabricated 1D–3D perovskite solar cells display a thermodynamic self‐healing ability, which is induced through blocking the ion‐migration channels of A‐site ions by the flexible 1D perovskite with less densely close‐packed structure. Particularly, the power conversion efficiency of as‐fabricated unencapsulated 1D–3D perovskite solar cells is demonstrated to be reversible under temperature cycling (25–85 °C) at 55% relative humidity, which largely outperforms the pure 3D perovskite solar cell. The present study provides a facile approach to fabricate 1D–3D perovskite solar cells with high efficiency and long‐term stability.

中文翻译：

热力学自修复1D–3D混合钙钛矿太阳能电池

钙钛矿太阳能电池的热降解仍然是一个未解决的问题，限制了其进一步的发展。在本研究中，2-（1 H将-吡唑-1-基）吡啶引入卤化铅3D钙钛矿中，可以得到1D-3D杂化钙钛矿材料。与传统的3D钙钛矿相比，异质结构1D-3D钙钛矿被证明能够显着延长光致发光衰减寿命并抑制电荷载流子复合。热力学稳定但动力学不稳定的一维材料的内在特性使系统能够减轻晶格失配并钝化可能在晶体生长过程中发生的一维3D杂化钙钛矿异质结区域的界面陷阱。重要的是，预制的1D–3D钙钛矿太阳能电池具有热力学自我修复能力，这是由于柔性的一维钙钛矿具有较低密度的密排结构而阻止了A位离子的离子迁移通道所致。特别是，在温度循环（25–85°C），相对湿度为55％的情况下，未经封装的1D–3D钙钛矿太阳能电池的功率转换效率被证明是可逆的，这在很大程度上优于纯3D钙钛矿太阳能电池。本研究提供了一种简便的方法来制造具有高效率和长期稳定性的1D–3D钙钛矿型太阳能电池。

更新日期：2018-03-14

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