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Improving the performance of dye-sensitized solar cells with TiO2/graphene/TiO2 sandwich structure.

Chen LC, Hsu CH, Chan PS, Zhang X, Huang CJ - Nanoscale Res Lett (2014)

Bottom Line: This study investigates the extent to which the TiO2/graphene/TiO2 sandwich structure improves the performance of dye-sensitized solar cells (DSSCs) over that of DSSCs with the traditional structure.Studies have demonstrated that the TiO2/graphene/TiO2 sandwich structure effectively enhances the open circuit voltage (V oc), short-circuit current density (J sc), and photoelectrical conversion efficiency (η) of DSSCs.The enhanced performance of DSSCs with the sandwich structure can be attributed to an increase in electron transport efficiency and in the absorption of light in the visible range.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Electro-optical Engineering, National Taipei University of Technology, 1, 3 Sec., Chung-Hsiao E. Rd., Taipei 106, Taiwan.

ABSTRACT
This study investigates the extent to which the TiO2/graphene/TiO2 sandwich structure improves the performance of dye-sensitized solar cells (DSSCs) over that of DSSCs with the traditional structure. Studies have demonstrated that the TiO2/graphene/TiO2 sandwich structure effectively enhances the open circuit voltage (V oc), short-circuit current density (J sc), and photoelectrical conversion efficiency (η) of DSSCs. The enhanced performance of DSSCs with the sandwich structure can be attributed to an increase in electron transport efficiency and in the absorption of light in the visible range. The DSSC with the sandwich structure in this study exhibited a V oc of 0.6 V, a high J sc of 11.22 mA cm(-2), a fill factor (FF) of 0.58, and a calculated η of 3.93%, which is 60% higher than that of a DSSC with the traditional structure.

No MeSH data available.


Related in: MedlinePlus

UV-vis absorption spectra of DSSCs with different structure (a) before and (b) after dye loading.
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Figure 4: UV-vis absorption spectra of DSSCs with different structure (a) before and (b) after dye loading.

Mentions: Figure 4 displays the UV-vis spectra of photoelectrodes with different structures before and after they were loaded with dye. Clearly, the photoelectrode with the TiO2/graphene/TiO2 sandwich structure has a higher absorption than those with the traditional structure both before and after loading with dye. Dye loading substantially increases the absorption in the short wavelength region (400 to 600 nm) perhaps because of the absorption of light by the N719 dye. The DSSC with the TiO2/graphene/TiO2 sandwich structure exhibited the greatest increase in absorption after dye loading perhaps because of the interface between the graphene and the TiO2 film and the upper photoelectrode with more porous structure, which retained more dye.


Improving the performance of dye-sensitized solar cells with TiO2/graphene/TiO2 sandwich structure.

Chen LC, Hsu CH, Chan PS, Zhang X, Huang CJ - Nanoscale Res Lett (2014)

UV-vis absorption spectra of DSSCs with different structure (a) before and (b) after dye loading.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4127667&req=5

Figure 4: UV-vis absorption spectra of DSSCs with different structure (a) before and (b) after dye loading.
Mentions: Figure 4 displays the UV-vis spectra of photoelectrodes with different structures before and after they were loaded with dye. Clearly, the photoelectrode with the TiO2/graphene/TiO2 sandwich structure has a higher absorption than those with the traditional structure both before and after loading with dye. Dye loading substantially increases the absorption in the short wavelength region (400 to 600 nm) perhaps because of the absorption of light by the N719 dye. The DSSC with the TiO2/graphene/TiO2 sandwich structure exhibited the greatest increase in absorption after dye loading perhaps because of the interface between the graphene and the TiO2 film and the upper photoelectrode with more porous structure, which retained more dye.

Bottom Line: This study investigates the extent to which the TiO2/graphene/TiO2 sandwich structure improves the performance of dye-sensitized solar cells (DSSCs) over that of DSSCs with the traditional structure.Studies have demonstrated that the TiO2/graphene/TiO2 sandwich structure effectively enhances the open circuit voltage (V oc), short-circuit current density (J sc), and photoelectrical conversion efficiency (η) of DSSCs.The enhanced performance of DSSCs with the sandwich structure can be attributed to an increase in electron transport efficiency and in the absorption of light in the visible range.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Electro-optical Engineering, National Taipei University of Technology, 1, 3 Sec., Chung-Hsiao E. Rd., Taipei 106, Taiwan.

ABSTRACT
This study investigates the extent to which the TiO2/graphene/TiO2 sandwich structure improves the performance of dye-sensitized solar cells (DSSCs) over that of DSSCs with the traditional structure. Studies have demonstrated that the TiO2/graphene/TiO2 sandwich structure effectively enhances the open circuit voltage (V oc), short-circuit current density (J sc), and photoelectrical conversion efficiency (η) of DSSCs. The enhanced performance of DSSCs with the sandwich structure can be attributed to an increase in electron transport efficiency and in the absorption of light in the visible range. The DSSC with the sandwich structure in this study exhibited a V oc of 0.6 V, a high J sc of 11.22 mA cm(-2), a fill factor (FF) of 0.58, and a calculated η of 3.93%, which is 60% higher than that of a DSSC with the traditional structure.

No MeSH data available.


Related in: MedlinePlus