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. 2014 Dec 12;9(1):671.
doi: 10.1186/1556-276X-9-671. eCollection 2014.

The effect of dye-sensitized solar cell based on the composite layer by anodic TiO2 nanotubes

Jun Hyuk Yang  1 , Kyung Hwan Kim  1 , Chung Wung Bark  1 , Hyung Wook Choi  1
Affiliations

The effect of dye-sensitized solar cell based on the composite layer by anodic TiO2 nanotubes

Jun Hyuk Yang et al. Nanoscale Res Lett. .

Abstract

TiO2 nanotube arrays are very attractive for dye-sensitized solar cells (DSSCs) owing to their superior charge percolation and slower charge recombination. Highly ordered, vertically aligned TiO2 nanotube arrays have been fabricated by a three-step anodization process. Although the use of a one-dimensional structure provides an enhanced photoelectrical performance, the smaller surface area reduces the adsorption of dye on the TiO2 surface. To overcome this problem, we investigated the effect of DSSCs constructed with a multilayer photoelectrode made of TiO2 nanoparticles and TiO2 nanotube arrays. We fabricated the novel multilayer photoelectrode via a layer-by-layer assembly process and thoroughly investigated the effect of various structures on the sample efficiency. The DSSC with a four-layer photoelectrode exhibited a maximum conversion efficiency of 7.22% because of effective electron transport and enhanced adsorption of dye on the TiO2 surface.

Keywords: Anodic oxidation; Composite layer; DSSCs; Photoelectrode; TiO2 nanotube array.

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Figures

Figure 1
Figure 1
Structure of multilayer DSSCs.
Figure 2
Figure 2
Flowchart for the manufacture of TNAs.
Figure 3
Figure 3
XRD patterns of (a) Ti foil, (b) TNAs, and (c) TNPs.
Figure 4
Figure 4
FE-SEM images of TNP and TNP surface and cross sections.
Figure 5
Figure 5
UV-Vis absorbance of single- to five-layer photoelectrodes.
Figure 6
Figure 6
EIS Nyquist plots of DSSCs with single- to five-layer photoelectrodes.
Figure 7
Figure 7
I-V curves of DSSCs with single- to five-layer photoelectrodes.
See this image and copyright information in PMC

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