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Quantum dot-sensitized solar cells having 3D-TiO2 flower-like structures on the surface of titania nanorods with CuS counter electrode.

Buatong N, Tang IM, Pon-On W - Nanoscale Res Lett (2015)

Bottom Line: Using CuS as the counter electrode instead of Pt offers the best performance and leads to an increase in the conversion efficiency (η).The efficiency of the CdS/CdSe/ZnS QD-loaded FTiR assembling CuS counter electrode cell improved from η = 2.715% (Voc = 0.692 V, Jsc = 5.896 mA/cm(2), FF = 0.665) to η = 0.703% (Voc = 0.665 V, Jsc = 2.108 mA/cm(2), FF = 0.501) for the QD-loaded FTiR assembling Pt counter electrode cell.These studies reveal a synergistically beneficial effect on the solar-to-current conversion of these QD-sensitized solar cells when a CuS counter electrode is used instead of the usual Pt counter electrode.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan Road, Lat Yao Chatuchak, Bangkok, 10900 Thailand.

ABSTRACT
The photovoltaic performance of a quantum dot (QD)-sensitized solar cell consisting of CdS/CdSe/ZnS QDs loaded onto the surface of the three-dimensional (3D) flower-like TiO2 structure grown on an array (1D) of TiO2 nanorods (FTiR) is studied. The flower-like structure on the rod-shaped titania was synthesized using a double-step hydrothermal process. The FTiR array exhibited a 3D/1D composite structure with a specific surface area of 81.87 m(2)/g. Using CuS as the counter electrode instead of Pt offers the best performance and leads to an increase in the conversion efficiency (η). The efficiency of the CdS/CdSe/ZnS QD-loaded FTiR assembling CuS counter electrode cell improved from η = 2.715% (Voc = 0.692 V, Jsc = 5.896 mA/cm(2), FF = 0.665) to η = 0.703% (Voc = 0.665 V, Jsc = 2.108 mA/cm(2), FF = 0.501) for the QD-loaded FTiR assembling Pt counter electrode cell. These studies reveal a synergistically beneficial effect on the solar-to-current conversion of these QD-sensitized solar cells when a CuS counter electrode is used instead of the usual Pt counter electrode.

No MeSH data available.


SEM images and EDS analysis of CuS films. (a) SEM images of CuS films on FTO, top view, and (b) EDS analysis of CuS film deposited on FTO glass.
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Fig7: SEM images and EDS analysis of CuS films. (a) SEM images of CuS films on FTO, top view, and (b) EDS analysis of CuS film deposited on FTO glass.

Mentions: Figure 7a shows the SEM images of CuS film which is prepared by chemical bath deposition method on the FTO glass. Herein the film is composed of aggregated particles about 1.0 μm in diameter (top view) to form a porous film (side view) (about 892.40 nm in thickness) (inset). To investigate the copper sulfide growth on the substrate, the spectrum of Cu and S elements in EDS analysis is present (Figure 7b) and can be proved that the formation of CuS layer on FTO glass surface can be achieved.Figure 7


Quantum dot-sensitized solar cells having 3D-TiO2 flower-like structures on the surface of titania nanorods with CuS counter electrode.

Buatong N, Tang IM, Pon-On W - Nanoscale Res Lett (2015)

SEM images and EDS analysis of CuS films. (a) SEM images of CuS films on FTO, top view, and (b) EDS analysis of CuS film deposited on FTO glass.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385307&req=5

Fig7: SEM images and EDS analysis of CuS films. (a) SEM images of CuS films on FTO, top view, and (b) EDS analysis of CuS film deposited on FTO glass.
Mentions: Figure 7a shows the SEM images of CuS film which is prepared by chemical bath deposition method on the FTO glass. Herein the film is composed of aggregated particles about 1.0 μm in diameter (top view) to form a porous film (side view) (about 892.40 nm in thickness) (inset). To investigate the copper sulfide growth on the substrate, the spectrum of Cu and S elements in EDS analysis is present (Figure 7b) and can be proved that the formation of CuS layer on FTO glass surface can be achieved.Figure 7

Bottom Line: Using CuS as the counter electrode instead of Pt offers the best performance and leads to an increase in the conversion efficiency (η).The efficiency of the CdS/CdSe/ZnS QD-loaded FTiR assembling CuS counter electrode cell improved from η = 2.715% (Voc = 0.692 V, Jsc = 5.896 mA/cm(2), FF = 0.665) to η = 0.703% (Voc = 0.665 V, Jsc = 2.108 mA/cm(2), FF = 0.501) for the QD-loaded FTiR assembling Pt counter electrode cell.These studies reveal a synergistically beneficial effect on the solar-to-current conversion of these QD-sensitized solar cells when a CuS counter electrode is used instead of the usual Pt counter electrode.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan Road, Lat Yao Chatuchak, Bangkok, 10900 Thailand.

ABSTRACT
The photovoltaic performance of a quantum dot (QD)-sensitized solar cell consisting of CdS/CdSe/ZnS QDs loaded onto the surface of the three-dimensional (3D) flower-like TiO2 structure grown on an array (1D) of TiO2 nanorods (FTiR) is studied. The flower-like structure on the rod-shaped titania was synthesized using a double-step hydrothermal process. The FTiR array exhibited a 3D/1D composite structure with a specific surface area of 81.87 m(2)/g. Using CuS as the counter electrode instead of Pt offers the best performance and leads to an increase in the conversion efficiency (η). The efficiency of the CdS/CdSe/ZnS QD-loaded FTiR assembling CuS counter electrode cell improved from η = 2.715% (Voc = 0.692 V, Jsc = 5.896 mA/cm(2), FF = 0.665) to η = 0.703% (Voc = 0.665 V, Jsc = 2.108 mA/cm(2), FF = 0.501) for the QD-loaded FTiR assembling Pt counter electrode cell. These studies reveal a synergistically beneficial effect on the solar-to-current conversion of these QD-sensitized solar cells when a CuS counter electrode is used instead of the usual Pt counter electrode.

No MeSH data available.