Enhanced electron extraction using SnO2 for high-efficiency planar-structure HC(NH2)2PbI3-based perovskite solar cells
Enhanced electron extraction using SnO2 for high-efficiency planar-structure HC(NH2)2PbI3-based perovskite solar cells
复制标题
使用 SnO2 增强电子提取，用于高效平面结构 HC(NH2)(2)PbI3 基钙钛矿太阳能电池
DOI：
10.1038/nenergy.2016.177
复制
发表时间：
2017-01-01
期刊：
影响因子：
56.7
通讯作者：
You, Jingbi
中科院分区：
文献类型：
--
作者：
Jiang, Qi;Zhang, Liuqi;You, Jingbi
用于卤化物钙钛矿太阳能电池的平面结构最近由于其简单和低温的器件制造工艺而受到关注。不幸的是，与介孔结构相比，平面结构通常显示出I-V滞后和较低的稳定器件效率，特别是对于基于TiO 2的n-i-p器件。与传统的TiO 2相比，SnO 2具有更深的导带和更高的电子迁移率，可以增强钙钛矿向电子传输层的电荷转移，减少界面处的电荷积累。在这里，我们报告低温溶液处理的SnO 2纳米粒子作为钙钛矿太阳能电池的有效电子传输层。我们的SnO 2基器件几乎没有滞后，我们建议这是由于电子提取的增强。通过在钙钛矿层中引入PbI 2钝化相，我们获得了19.9 +/- 0.6%的认证效率。这些器件可以在低温（150摄氏度）下轻松加工，为大规模生产钙钛矿太阳能电池提供了一种有效的方法。
Planar structures for halide perovskite solar cells have recently garnered attention, due to their simple and low-temperature device fabrication processing. Unfortunately, planar structures typically show I-V hysteresis and lower stable device efficiency compared with mesoporous structures, especially for TiO2-based n-i-p devices. SnO2, which has a deeper conduction band and higher electron mobility compared with traditional TiO2, could enhance charge transfer from perovskite to electron transport layers, and reduce charge accumulation at the interface. Here we report low-temperature solution-processed SnO2 nanoparticles as an efficient electron transport layer for perovskite solar cells. Our SnO2-based devices are almost free of hysteresis, which we propose is due to the enhancement of electron extraction. By introducing a PbI2 passivation phase in the perovskite layer, we obtain a 19.9 +/- 0.6% certified efficiency. The devices can be easily processed under low temperature (150 degrees C), offering an efficient method for the large-scale production of perovskite solar cells.