Hysteresis-Free Lead-Free Double-Perovskite Solar Cells by Interface Engineering
Hysteresis-Free Lead-Free Double-Perovskite Solar Cells by Interface Engineering
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DOI：
10.1021/acsenergylett.8b00871
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发表时间：
2018-08-01
影响因子：
22
通讯作者：
Grancini, Giulia
中科院分区：
文献类型：
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作者：
Pantaler, Martina;Cho, Kyung Taek;Grancini, Giulia
混合钙钛矿太阳能电池已经在光伏领域引起了相当大的兴奋。然而，它们仍然依赖于有毒元素，这严重限制了它们的商业化。Cs2AgBiBr6形式的无铅双杂化钙钛矿已被证明是一种有前途的无毒和高度稳定的替代品。然而，设备的发展仍处于起步阶段，性能受到严重滞后的影响。本文首次实现了器件特性无s型、器件开路电压提高的无滞后介孔双钙钛矿太阳能电池。这是通过微调材料沉积参数，实现高度均匀和紧凑的Cs2AgBiBr6的生长，以及通过筛选不同的分子和聚合物空穴传输材料来设计器件接口来实现的。我们的工作代表了无铅双钙钛矿向前迈出的关键一步，具有缩小其市场吸收差距的巨大潜力。
Hybrid perovskite solar cells have been creating considerable excitement in the photovoltaic community. However, they still rely on toxic elements, which impose severe limits on their commercialization. Lead-free double hybrid perovskites in the form of Cs2AgBiBr6 have been shown to be a promising nontoxic and highly stable alternative. Nevertheless, device development is still in its infancy, and performance is affected by severe hysteresis. Here we realize for the first time hysteresis-free mesoporous double-perovskite solar cells with no s-shape in the device characteristic and increased device open-circuit voltage. This has been realized by fine-tuning the material deposition parameters, enabling the growth of a highly uniform and compact Cs2AgBiBr6, and by engineering the device interfaces by screening different molecular and polymeric hole-transporting materials. Our work represents a crucial step forward in lead-free double perovskites with significant potential for closing the gap for their market uptake.