Micrometer Sized Perovskite Crystals in Planar Hole Conductor Free Solar Cells
Micrometer Sized Perovskite Crystals in Planar Hole Conductor Free Solar Cells
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DOI：
10.1021/acs.jpcc.5b07554
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发表时间：
2015-08-27
影响因子：
3.7
通讯作者：
Etgar, Lioz
中科院分区：
文献类型：
--
作者：
Gamliel, Shany;Dymshits, Alex;Etgar, Lioz
在这项工作中，我们展示了无孔导体（HTM）钙钛矿基太阳能电池的平面结构。采用喷雾法制备CH3NH3PbI3钙钛矿，得到微米级钙钛矿晶体。喷淋次数改变了CH3NH3PbI3膜的厚度；例如，10次喷雾可以获得3.4 μ m的钙钛矿膜厚度。令人惊讶的是，这种新颖、简单的太阳能电池结构具有不含HTM的厚钙钛矿膜，其功率转换效率达到6.9%。电容电压测量显示CH3NH3PbI3/Au界面处电荷积累，而紧凑的TiO2/CH3NH3PbI3界面处存在空间电荷区，这抑制了复合。研究这些界面是理解这种独特太阳能电池结构运行机制的关键。这种简单的平面无HTM钙钛矿太阳能电池展示了制造大规模太阳能电池的潜力，同时保持了简单、低成本的结构。
In this work we demonstrate the planar configuration on hole conductor (HTM) free perovskite based solar cells. The CH3NH3PbI3 perovskite was deposited using the spray technique to achieve micrometer size perovskite crystals. The number of spray passes changes the CH3NH3PbI3 film thickness; for example, 10 spray passes achieved a film thickness of 3.4 mu m of perovskite. Surprisingly, power conversion efficiency of 6.9% was demonstrated for this novel, simple solar cell structure with thick perovskite film that has no HTM. Capacitance voltage measurements reveal charge accumulation at the CH3NH3PbI3/Au interface while the compact TiO2/CH3NH3PbI3 junction showed a space charge region, which inhibits the recombination. Studying these interfaces is key to understanding the operation mechanism of this unique solar cell structure. This simple planar HTM free perovskite solar cell demonstrates the potential to make large-scale solar cells while maintaining a simple, low-cost architecture.