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首页> 外文期刊>Advanced energy materials >Fusing Nanowires into Thin Films: Fabrication of Graded- Heterojunction Perovskite Solar Cells with Enhanced Performance
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Fusing Nanowires into Thin Films: Fabrication of Graded- Heterojunction Perovskite Solar Cells with Enhanced Performance

机译：将纳米线融入薄膜：具有增强性能的渐变 - 异质结的钙钛矿太阳能电池的制造

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摘要

Perovskite solar cells (PSCs) have recently experienced a rapid rise in power conversion efficiency (PCE), but the prevailing PSCs with conventional mesoscopic or planar device architectures still contain nonideal perovskite/hole-transporting-layer (HTL) interfaces, limiting further enhancement in PCE and device stability. In this work, CsPbBr3 perovskite nanowires are employed for modifying the surface electronic states of bulk perovskite thin films, forming compositionally-graded heterojunction at the perovskite/HTL interface of PSCs. The nanowire morphology is found to be key to achieving lateral homogeneity in the perovskite film surface states resulting in a near-ideal graded heterojunction. The hidden role of such lateral homogeneity on the performance of graded-heterojunction PSCs is revealed for the first time. The resulting PSCs show high PCE up to 21.4%, as well as high operational stability, which is superior to control PSCs fabricated without CsPbBr3-nanocrystals modification and with CsPbBr3-nanocubes modification. This study demonstrates the promise of controlled hybridization of perovskite nanowires and bulk thin films for more efficient and stable PSCs.
机译：佩洛夫斯基钛矿太阳能电池（PSCS）最近经历了电力转换效率（PCCE）的快速上升，但具有传统介面或平面装置架构的主要PSC仍然含有非显着钙钛矿/空穴传输层（HTL）界面，限制了进一步的增强PCE和设备稳定性。在这项工作中，CSPBBR3 Perovskite纳米线用于修饰散装钙钛矿薄膜的表面电子状态，在PSC的PeroVskite / HTL界面处形成合成渐变的异质结。发现纳米线形态被发现是在钙钛矿薄膜表面状态下实现横向均匀性的关键导致近乎理想的渐变异质结。这种横向均匀性对等级异质结PSC的性能的隐藏作用是首次揭示的。得到的PSCs显示高达21.4％的高PCE，以及​​高运行稳定性，其优于控制PSC，而没有CSPBBR3-纳米晶体改性和CSPBBR3-纳米孔改性。本研究表明，对钙钛矿纳米线和散装薄膜的控制杂交的承诺，以获得更有效和稳定的PSC。

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