Jump to main content
Jump to site search

Issue 5, 2013
Previous Article Next Article

Nanorod–nanosheet hierarchically structured ZnO crystals on zinc foil as flexible photoanodes for dye-sensitized solar cells

Author affiliations

Abstract

In this paper, ZnO nanorodnanosheet hierarchical structures were fabricated using a facile method on zinc foil and used as flexible photoanodes in dye-sensitized solar cells (DSCs). Compared to nanorods (NRs) obtained by the dissolution–precipitation method, the nanorodnanosheet (NR–NS) hierarchical structures obtained by a second-step homogeneous precipitation improved the performance of DSCs by increasing photocurrent density significantly. As a result, the power conversion efficiency of the devices based on such a NR–NS hierarchical structure reached up to 2.4% under 100 mW cm−2 illumination condition. This represents an enhancement by 108% as compared to DSCs based on NR assembled nanoflowers, for which the efficiency was 1.1%. The enhancement of the photocurrent was due mainly to the much larger specific surface area and resulting dye-loading amount. The electron transport properties in this structure were also investigated by means of electrochemical impedance spectroscopy (EIS). Furthermore, the formation mechanism of the NR–NS hierarchical structures are discussed.

Graphical abstract: Nanorod–nanosheet hierarchically structured ZnO crystals on zinc foil as flexible photoanodes for dye-sensitized solar cells

Back to tab navigation

Article information


Submitted
12 Nov 2012
Accepted
22 Dec 2012
First published
03 Jan 2013

Nanoscale, 2013,5, 1894-1901
Article type
Paper

Nanorodnanosheet hierarchically structured ZnO crystals on zinc foil as flexible photoanodes for dye-sensitized solar cells

R. Gao, J. Tian, Z. Liang, Q. Zhang, L. Wang and G. Cao, Nanoscale, 2013, 5, 1894
DOI: 10.1039/C2NR33599A

Social activity

Search articles by author

Spotlight

Advertisements