Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43787
Title: Facile preparation of hierarchical TiO2 nanowire-nanoparticle/nanotube architecture for highly efficient dye-sensitized solar cells
Authors: Fu, N
Liu, Y
Liu, Y
Lu, W
Zhou, L 
Peng, F
Huang, H 
Issue Date: 2015
Publisher: Royal Society of Chemistry
Source: Journal of materials chemistry A, 2015, v. 3, no. 40, p. 20366-20374 How to cite?
Journal: Journal of materials chemistry A 
Abstract: In the present work, we developed a facile post-treatment approach, namely one-step hot-water soaking, to the fabrication of double-layer and hierarchical TiO2 nanotube arrays (H-TNTAs) comprising a nanoparticle/nanotube hybrid layer and a TiO2 nanowire cap layer for highly efficient dye-sensitized solar cells (DSSCs). The nanoparticle/nanotube hybrid structure of the H-TNTA provides enormous specific surface area for sufficient dye attachment and the TiO2 nanowire cap layer serves as a light-scattering layer with increased dye-absorption for superior light harvesting efficiency. This engineered integration makes it possible to control the dye-anchoring, charge transport, charge collection, and light scattering within a photoanode simultaneously. The DSSC based on the well tailored architecture yields an exciting power conversion efficiency of 8.21% under 100 mW cm-2, corresponding to 51% improvement as compared with the cell built on the pristine TNTA (P-TNTA, 5.43%). The efficiency can be further improved to 8.82% when the H-TNTA photoanodes are subjected to an additional TiCl4 treatment.
URI: http://hdl.handle.net/10397/43787
ISSN: 2050-7488
EISSN: 2050-7496
DOI: 10.1039/c5ta05752c
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