Efficient Metal Halide Perovskite Solar Cells Prepared by Reproducible Electrospray Coating on Vertically Aligned TiO2 Nanorod Electrodes
Efficient Metal Halide Perovskite Solar Cells Prepared by Reproducible Electrospray Coating on Vertically Aligned TiO2 Nanorod Electrodes
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DOI：
10.1021/acsami.9b19121
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发表时间：
2020-01-08
影响因子：
9.5
通讯作者：
Im, Sang Hyuk
中科院分区：
文献类型：
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作者：
Heo, Jin Hyuck;Im, Kyungmin;Im, Sang Hyuk
具有直大孔的垂直排列的TiO2纳米棒（NR）电极使金属卤化物钙钛矿（MHP）溶液能够完全渗透到其结构内，因此在电喷涂过程中可重复地形成无空隙致密MHP薄膜，而具有三维互连介孔的传统介孔TiO2（m-TiO2）电极通过MHP溶液的不完美渗透形成内部空隙。因此，基于TiO2 NR的MHP太阳能电池可以通过电喷涂工艺更可重复地制造，并且由于一维TiO2 NR电极或TiO2 NR电极内致密形成的MHP层的电子路径短而直，因此与基于m-TiO2的MHP太阳能电池相比，在扫描方向和扫描速率方面表现出更小的电流密度-电压滞后。
Vertically aligned TiO2 nanorod (NR) electrodes with straight macropores enabled a metal halide perovskite (MHP) solution to be fully infiltrated within their structure and, as a result, formed void-free dense MHP films reproducibly during an electrospray-coating process, whereas conventional mesoporous TiO2 (m-TiO2) electrodes with three-dimensionally interconnected mesopores formed internal voids by imperfect infiltration of MHP solution. Hence, TiO2 NR-based MHP solar cells could be more reproducibly fabricated by an electrospray-coating process and exhibited smaller current density-voltage hysteresis with respect to the scan direction and scan rate than the m-TiO2-based MHP solar cells due to the short and straight electron pathway either by a one-dimensional TiO2 NR electrode or a densely formed MHP layer within the TiO2 NR electrode.