scholarly journals CoSe2@N-Doped Graphene Nanocomposite High-Efficiency Counter Electrode For Dye-Sensitized Solar Cells

2021 ◽  
Author(s):  
Tansir Ahamad
Keyword(s):  
Solar Cells ◽  
Counter Electrode ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Photoelectric Conversion ◽  
Counter Electrodes ◽  
Dye Sensitized ◽  
Doped Graphene ◽  
Graphene Nanocomposite ◽  
Sensitized Solar Cells

Abstract Photovoltaics is defined as a group of solar cells that convert solar energy into electricity. Among these cells, dye-sensitized solar cells (DSSCs) have received considerable attention due to of their low cost and high efficiency for energy conversion. In present study, CoSe2@N-doped graphene nanocomposite has been prepared in an inert atmosphere and used as a DSSC counter electrode. The fabricated nanocomposite was characterised using analytical techniques including FTIR, TGA, XRD, Raman, XPS, and BET. The assembled DSSC obtains a photoelectric conversion efficiency (PCE) of 7.65%, which is higher than the PCE (7.19%) of the Pt electrode assembly cell under the same conditions. The promising performance of the fabricated counter electrodes may be due to the excellent surface area of the nanocomposites, the doping of hetroatomes which provide the active sites to boost the catalytic activities towards I3- reduction.

Polyoxometalate modified transparent metal selenide counter electrodes for high-efficiency bifacial dye-sensitized solar cells

2021 ◽  
Author(s):  
Lu Zhang ◽  
Wei-Chao Chen ◽  
Ting Wang ◽  
Yun-Jiang Li ◽  
Chun-Hui Ma ◽  
...  
Keyword(s):  
Solar Cells ◽  
Counter Electrode ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Cost Benefit ◽  
Counter Electrodes ◽  
Dye Sensitized ◽  
One Step ◽  
Sensitized Solar Cells

In the development of bifacial dye-sensitized solar cells (DSSCs), the exploration of cost-benefit transparent counter electrode is a permanent target. Herein, we put forward a simple one-step strategy to load...

The Effects of Sputtering Pressure on the Properties of Carbon Counter Electrodes for Dye-Sensitized Solar Cells

2012 ◽  
Vol 430-432 ◽  
pp. 631-635
Author(s):  
Shu Hong Liu ◽  
Gui Shan Liu ◽  
Xiao Yue Shen ◽  
Zhi Qiang Hu
Keyword(s):  
Solar Cells ◽  
Sheet Resistance ◽  
Carbon Film ◽  
Dye Sensitized Solar Cells ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Counter Electrodes ◽  
Dye Sensitized ◽  
Sputtering Pressure ◽  
Sensitized Solar Cells

The carbon counter electrodes for Dye-sensitized solar cells (DSSCs) were deposited on FTO glass using graphite target by bipolar pulse magnetron sputtering. The effects of sputtering pressure on the structures and properties for carbon films were investigated. The carbon bond structure was analyzed by Raman spectra. The sheet resistance of carbon film was detected by four-probe tester. The transmittance was tested by UV-visible spectrum. The performance of DSSCs was tested by solar simulator after the cells assembled. The results indicated that the ratio of ID/IG reduced, the degree of graphitization decreased, sheet resistance raised, transmittance increased and photoelectric conversion efficiency reduced with the increasing of sputtering pressure.

Improved Efficiency of Dye Sensitized Solar Cells Using Aligned Carbon Nanotubes

2009 ◽  
Author(s):  
Robert A. Sayer ◽  
Stephen L. Hodson ◽  
Timothy S. Fisher
Keyword(s):  
Carbon Nanotubes ◽  
Solar Cells ◽  
Counter Electrode ◽  
Microwave Plasma ◽  
Dye Sensitized Solar Cells ◽  
Planar Geometry ◽  
Counter Electrodes ◽  
Dye Sensitized ◽  
Cnt Arrays ◽  
Sensitized Solar Cells

Dye sensitized solar cells (DSSCs) offer many advantages in comparison to their Si-based counterparts, including lower cost of raw materials, faster manufacturing time, and the ability to be integrated with flexible substrates. Although many advances have been made in DSSC fabrication over recent years, their efficiency remains lower than commercially available Si photovoltaic cells. Here we report improved efficiency of TiO2/anthocyanin dye solar cell using aligned arrays of carbon nanotubes (CNTs) as a counter electrode. Dense vertically oriented CNT arrays are grown directly on the counter electrode using microwave plasma chemical vapor deposition and a tri-layer (Ti/Al/Fe) catalyst. The resulting arrays are 30 micrometers in height and have a number density of approximately five hundred million per square millimeter. By directly growing the CNTs on the counter electrode substrate, electrical interface conductance is enhanced. The performance of both as-grown and N-doped (using a nitrogen plasma) CNT arrays is reported. The fabricated DSSCs are tested under AM1.5 light. Increased short circuit current is observed in comparison to graphite and Pt counter electrodes. We attribute this improvement to the large surface area created by the 3D structure of the arrays in comparison to the planar geometry of the graphite and Pt electrodes as well as the excellent electrical properties of the CNTs.

scholarly journals A down-shifting Eu 3+ -doped Y 2 WO 6 /TiO 2 photoelectrode for improved light harvesting in dye-sensitized solar cells

2018 ◽  
Vol 5 (2) ◽  
pp. 171054 ◽  
Author(s):  
J. Llanos ◽  
I. Brito ◽  
D. Espinoza ◽  
Ramkumar Sekar ◽  
P. Manidurai
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Light Harvesting ◽  
Electrochemical Impedance ◽  
Dye Sensitized Solar Cells ◽  
Photoelectric Conversion Efficiency ◽  
Visible Radiation ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Y 1.86 Eu 0.14 WO 6 phosphors were prepared using a solid-state reaction method. Their optical properties were analysed, and they was mixed with TiO 2 , sintered, and used as a photoelectrode (PE) in dye-sensitized solar cells (DSSCs). The as-prepared photoelectrode was characterized by photoluminescence spectroscopy, diffuse reflectance, electrochemical impedance spectroscopy (EIS) and X-ray diffraction. The photoelectric conversion efficiency of the DSSC with TiO 2 :Y 1.86 Eu 0.14 WO 6 (100:2.5) was 25.8% higher than that of a DSCC using pure TiO 2 as PE. This high efficiency is due to the ability of the luminescent material to convert ultraviolet radiation from the sun to visible radiation, thus improving the solar light harvesting of the DSSC.

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