Overcoming ultraviolet light instability of sensitized TiO2 with meso-superstructured organometal tri-halide perovskite solar cells
Overcoming ultraviolet light instability of sensitized TiO2 with meso-superstructured organometal tri-halide perovskite solar cells
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DOI：
10.1038/ncomms3885
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发表时间：
2013-12-01
影响因子：
16.6
通讯作者：
Snaith, Henry J.
中科院分区：
文献类型：
--
作者：
Leijtens, Tomas;Eperon, Giles E.;Snaith, Henry J.
混合固态太阳能电池的功率转换效率在过去一年中从7%增加到15%。这在很大程度上是由于有机金属三卤化物钙钛矿吸收剂并入这些装置的结果。但是，尽管这一发展前景广阔，但在开发实用的固态太阳能电池时，长期运行稳定性与初始转换效率同样重要。在这里，我们确定了一个关键的不稳定性介孔二氧化钛敏化太阳能电池所产生的光诱导解吸表面吸附的氧。我们表明，这种不稳定性不会出现在介孔TiO2无mesosuperstructured太阳能电池。此外，我们的无TiO2电池在全光谱模拟阳光下连续暴露和运行超过1，000小时，可提供稳定的光电流。
The power conversion efficiency of hybrid solid-state solar cells has more than doubled from 7 to 15% over the past year. This is largely as a result of the incorporation of organometallic trihalide perovskite absorbers into these devices. But, as promising as this development is, long-term operational stability is just as important as initial conversion efficiency when it comes to the development of practical solid-state solar cells. Here we identify a critical instability in mesoporous TiO2-sensitized solar cells arising from light-induced desorption of surface-adsorbed oxygen. We show that this instability does not arise in mesoporous TiO2-free mesosuperstructured solar cells. Moreover, our TiO2-free cells deliver stable photocurrent for over 1,000 h continuous exposure and operation under full spectrum simulated sunlight.