Enhanced electron extraction from template-free 3D nanoparticulate transparent conducting oxide (TCO) electrodes for dye-sensitized solar cells.
Enhanced electron extraction from template-free 3D nanoparticulate transparent conducting oxide (TCO) electrodes for dye-sensitized solar cells.
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DOI：
10.1021/am301090a
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发表时间：
2012-08
影响因子：
9.5
通讯作者：
Zhenzhen Yang;Shanmin Gao;Tao Li;Fa-Qian Liu;Yang Ren;T. Xu
中科院分区：
文献类型：
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作者：
Zhenzhen Yang;Shanmin Gao;Tao Li;Fa-Qian Liu;Yang Ren;T. Xu
最高效的染料敏化太阳能电池（DSSC）中的基于半导体金属氧化物的光阳极需要低掺杂水平以促进电荷分离，然而，这限制了慢扩散区域中随后的电子提取。这些冲突在新的光电阳极设计中得到缓解，该设计将电荷分离和提取功能解耦。三维高掺杂氟化SnO（2）（FTO）纳米颗粒薄膜作为低电阻和漂移辅助电荷提取的导电核心，而薄的低掺杂共形TiO（2）壳则保持较大的复合电阻（因此具有较长的电荷寿命）。 EIS表明电子渡越时间减少了几个数量级，而复合电阻保持在传统纳米颗粒TiO(2)光电极的范围内。
The semiconducting metal oxide-based photoanodes in the most efficient dye-sensitized solar cells (DSSCs) desires a low doping level to promote charge separation, which, however, limits the subsequent electron extraction in the slow diffusion regime. These conflicts are mitigated in a new photoanode design that decouples the charge separation and extraction functions. A three-dimensional highly doped fluorinated SnO(2) (FTO) nanoparticulate film serves as conductive core for low-resistance and drift-assisted charge extraction while a thin, low-doped conformal TiO(2) shell maintains a large resistance to recombination (and therefore long charge lifetime). EIS reveals that the electron transit time is reduced by orders of magnitude, whereas the recombination resistance remains in the range of traditional nanoparticle TiO(2) photoelectrodes.