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Issue 35, 2018
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A 1D conical nanotubular TiO2/CdS heterostructure with superior photon-to-electron conversion

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Abstract

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.

Graphical abstract: A 1D conical nanotubular TiO2/CdS heterostructure with superior photon-to-electron conversion

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Publication details

The article was received on 23 Mar 2018, accepted on 23 May 2018 and first published on 14 Aug 2018


Article type: Paper
DOI: 10.1039/C8NR02418A
Citation: Nanoscale, 2018,10, 16601-16612
  • Open access: Creative Commons BY-NC license
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    A 1D conical nanotubular TiO2/CdS heterostructure with superior photon-to-electron conversion

    R. Zazpe, H. Sopha, J. Prikryl, M. Krbal, J. Mistrik, F. Dvorak, L. Hromadko and J. M. Macak, Nanoscale, 2018, 10, 16601
    DOI: 10.1039/C8NR02418A

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