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首页> 外文会议>IEEE Photovoltaic Specialists Conference >The Second Spacer Cation Assisted Growth of 2D Perovskite Film with Oriented Large Grain for Highly Efficient and Stable Solar Cells
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The Second Spacer Cation Assisted Growth of 2D Perovskite Film with Oriented Large Grain for Highly Efficient and Stable Solar Cells

机译：第二间隔阳离子辅助2D钙钛矿薄膜的生长，具有面向大颗粒的高效稳定的太阳能电池

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The fabrication of high quality film with large grains oriented grown along the direction of film thickness is of great importance for the two-dimensional (2D) Ruddlesden-Popper perovskite-based solar cells (PVSCs) with high power conversion efficiency (PCE). In this work, for the first time, we realized the fabrication of high quality 2D BA2MAn-1PbnI3n+1 (BA+= butylammonium, MA+ = methylammonium, n = 5) perovskite film, with enlarged grain size over 1 μm and preferential orientation growth by introducing a second spacer cation (SSC+) into the precursor solution. As evidenced by dynamic light scattering measurement, SSC+ addition can induce aggregation in the precursor solution. The precursor aggregates are favorable for the formation of large crystal grains via inducing nucleation and decreasing the nucleation sites. Applying phenylethylammonium as SSC+, the optimized inverted planar PVSCs presented a maximum PCE of 14.09%, which is the highest value of the 2D BA2MAn-1PbnI3n+1 (n=5) PVSCs. The unsealed device shows good moisture stability by maintaining around 90% of its initially efficiency after 1000 hours' exposure to the air (Hr = 25±5%). The present work provides a new route toward a highly efficient and stable PVSCs for future commercialization.
机译：沿着薄膜厚度方向的大晶粒制备高质量薄膜的制造对于具有高功率转换效率（PCCE）的基于二维（2D）Ruddlesdop-Popper（PVSC）的二维（2D）鲁德勒斯普勒斯（PVSC）非常重要。在这项工作中，我们首次实现了高质量的2D BA的制作 2 嘛 n-1 PB. n 一世 3n + 1 （BA. + =丁基铵，马 + =甲基铵，n = 5）钙钛矿膜，通过将第二间隔阳离子（SSC +）引入前体溶液，具有超过1μm的粒径和优先取向生长。如动态光散射测量所证明，SSC +添加可以在前体溶液中诱导聚集。前体聚集体是有利于通过诱导成核并降低成核位点的形成大晶粒。施用苯基乙基作为SSC +，优化的倒置平面PVSC呈现最大PCE为14.09％，这是2D BA的最高值 2 嘛 n-1 PB. n 一世 3n + 1 （n = 5）PVSC。未密封的装置通过在1000小时暴露于空气（HR = 25±5后，通过维持其最初效率的大约90％的效率良好的水分稳定性（HR = 25±5％）。目前工作为未来商业化提供了高效稳定的PVSC的新路线。

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