期刊
NANOSCALE
卷 10, 期 35, 页码 16601-16612出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr02418a
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资金
- European Research Council (ERC) [638857]
- Ministry of Education, Youth and Sports of the Czech Republic [LM2015082, LQ1601]
- CERIC-ERIC Consortium [20172101]
Herein, a new strategy to efficiently harvest photons in solar cells is presented. A solar cell heterostructure is put forward, based on a 1D conical TiO2 nanotubular scaffold of high aspect ratio, homogenously coated with a thin few nm layer of CdS light absorber using atomic layer deposition (ALD). For the first time, a large variety of conical nanotube layers with a huge span of aspect ratios was utilized and ALD was used for the preparation of a uniform CdS coating within the entire high surface area of the TiO2 nanotubes. The resulting 1D conical CdS/TiO2 tubular heterostructure acts as a sink for photons. Due to the multiple light scattering and absorption events within this nanotubular sink, a large portion of photons (nearly 80%) is converted into electrons. It is the combination of the scaffold architecture and the light absorber present on the high surface area as a very thin layer, the optimized charge transport and multiple optical effects that make this heterostructure very promising for the next generation of highly performing solar cells.
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