CdS quantum dot-sensitized solar cells based on nano-branched TiO2 arrays.
Nanoscale Res Lett
; 9(1): 107, 2014 Mar 04.
Article
em En
| MEDLINE
| ID: mdl-24597830
ABSTRACT
Nano-branched rutile TiO2 nanorod arrays were grown on FSnO2 conductive glass (FTO) by a facile, two-step wet chemical synthesis process at low temperature. The length of the nanobranches was tailored by controlling the growth time, after which CdS quantum dots were deposited on the nano-branched TiO2 arrays using the successive ionic layer adsorption and reaction method to make a photoanode for quantum dot-sensitized solar cells (QDSCs). The photovoltaic properties of the CdS-sensitized nano-branched TiO2 solar cells were studied systematically. A short-circuit current intensity of approximately 7 mA/cm2 and a light-to-electricity conversion efficiency of 0.95% were recorded for cells based on optimized nano-branched TiO2 arrays, indicating an increase of 138% compared to those based on unbranched TiO2 nanorod arrays. The improved performance is attributed to a markedly enlarged surface area provided by the nanobranches and better electron conductivity in the one-dimensional, well-aligned TiO2 nanorod trunks.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
Nanoscale Res Lett
Ano de publicação:
2014
Tipo de documento:
Article