Efficient and stable CH3NH3PbI3-sensitized ZnO nanorod array solid-state solar cells
Efficient and stable CH3NH3PbI3-sensitized ZnO nanorod array solid-state solar cells
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DOI：
10.1039/c3nr01542d
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发表时间：
2013-01-01
期刊：
影响因子：
6.7
通讯作者：
Hagfeldt, Anders
中科院分区：
文献类型：
--
作者：
Bi, Dongqin;Boschloo, Gerrit;Hagfeldt, Anders
我们首次报告将钙钛矿 (CH3NH3PbI3) 吸收剂与 ZnO 纳米棒阵列 (NRA) 结合用于太阳能电池应用。钙钛矿材料比分子染料敏化剂具有更高的吸收系数，具有更好的太阳能电池稳定性，因此更适合作为ZnO NRA的敏化剂。结构为ZnO NRA/CH3NH3PbI3/spiro-MeOTAD/Ag的太阳能电池在1000 W m(-2) AM 1.5 G光照下实现了5.0%的太阳能电池效率。此外，太阳能电池表现出良好的长期稳定性。通过瞬态光电流和光电压测量，发现电子传输时间和寿命随 ZnO 纳米棒长度的变化而变化，这一趋势与染料敏化太阳能电池 DSC 中的趋势相似，表明 ZnO NRA/CH3NH3PbI3 太阳能电池中的电荷转移过程与传统 DSC 中类似。与 CH3NH3PbI3/TiO2 太阳能电池相比，ZnO 由于复合损失较多而表现出较低的性能。
We report for the first time the use of a perovskite (CH3NH3PbI3) absorber in combination with ZnO nanorod arrays (NRAs) for solar cell applications. The perovskite material has a higher absorption coefficient than molecular dye sensitizers, gives better solar cell stability, and is therefore more suited as a sensitizer for ZnO NRAs. A solar cell efficiency of 5.0% was achieved under 1000 W m(-2) AM 1.5 G illumination for a solar cell with the structure: ZnO NRA/CH3NH3PbI3/spiro-MeOTAD/Ag. Moreover, the solar cell shows a good long-term stability. Using transient photocurrent and photovoltage measurements it was found that the electron transport time and lifetime vary with the ZnO nanorod length, a trend which is similar to that in dye-sensitized solar cells, DSCs, suggesting a similar charge transfer process in ZnO NRA/CH3NH3PbI3 solar cells as in conventional DSCs. Compared to CH3NH3PbI3/TiO2 solar cells, ZnO shows a lower performance due to more recombination losses.