Photovoltaic performance of dye-sensitized solar cells stained with black dye under pressurized condition and mechanism for high efficiency

Ogomi, Yuhei; Kashiwa, Yohei; Noma, Yukio; Fujita, Y.; Kojima, Shinichi; Kono, Mitsuru; Yamaguchi, Yoshihiro; Hayase, Shuzi

doi:10.1016/j.solmat.2008.11.030

Cited by 20 publications

(16 citation statements)

References 21 publications

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“…The maximum photocurrent density ( J max ) of a single‐junction solar cell is calculated by convolving the cell photoresponse with the solar spectrum and therefore is defined by the effective bandgap of the absorber ( E g );17 Figure a demonstrates that values as large as 43 mA cm −2 are expected by the absorption edge of crystalline Si, while lower values of about 27–36 mA cm −2 are expected for DSCs using pioneer CYC‐B1,14, 18–20 black dye,21–23 and C218 pure organic dye16 as sensitizers (the molecular structures of the dyes are shown in Figure 1b). Although Si solar cells attain 99% of the J max , black dye (and C218 dye) is able to reach only 61%.…”

Section: Dscs Versus Conventional Semiconductor Solar Cellsmentioning

confidence: 99%

Minimizing Energy Losses in Dye‐Sensitized Solar Cells Using Coordination Compounds as Alternative Redox Mediators Coupled with Appropriate Organic Dyes

Στεργιόπουλος

Falaras

2012

Advanced Energy Materials

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To further boost the efficiency of dye‐sensitized solar cells, a correct evaluation of the real limitations of this type of solar cell should be conducted. From a simple analysis of the photovoltaic data found in the literature, it is evident that the Voc decrease, through energy losses, seems to be the most crucial factor diminishing the overall system efficiency. In particular, losses arising from the regeneration of the dye by the iodide/triiodide redox mediator are huge. The most convenient manner to recuperate these losses is the use of alternative redox mediators with more positive redox potentials than that of the iodide‐based shuttle. Among various types of redox active compounds, ferrocene/ferrocenium, Cu+/2+, and Co2+/3+ complexes are found to be the most effective in solar cells and the obtained efficiencies of more than 12% clearly show that a breakthrough is close, paving revolutionary roads towards making new records.

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Section: Dscs Versus Conventional Semiconductor Solar Cellsmentioning

confidence: 99%

Minimizing Energy Losses in Dye‐Sensitized Solar Cells Using Coordination Compounds as Alternative Redox Mediators Coupled with Appropriate Organic Dyes

Στεργιόπουλος

Falaras

2012

Advanced Energy Materials

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“…In the suite, we refer to this technique as the N-749 SCF Method, where the acronym SCF is introduced to denote a supercritical-fluid. The optimum concentration of the dye in sc-CO 2 ranged from 0.5 × 10 −4 to 0.9 × 10 −4 M at pressures ranging from 10 to 15 MPa [14]. A volume of 7 mL of 3.0 × 10 −4 M of dye in a solvent was injected in a variablevolume view cell (purchased from Metallic Creations Co.).…”

Section: Dye Impregnation By the Supercritical Methodmentioning

confidence: 99%

Effect of Solvent, Dye-Loading Time, and Dye Choice on the Performance of Dye-Sensitized Solar Cells

Rajab

2016

Journal of Nanomaterials

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Anatase titania films with a thickness of up to 20 μm and deposited over a fluorine-doped tin-oxide substrate are impregnated with ruthenium dyes N-719 and N-749 using Dip and supercritical-fluid methods for the purpose of fabricating dye-sensitized solar cell devices. The dyes are dissolved in different solvent mixtures, including supercritical carbon dioxide, as well as combinations of more traditional solvents including mixtures of acetonitrile, and t-butanol. Analytical studies included thin-film analyzing and scanning electron microscopy to measure titania film thickness and porosity, UV-Vis spectroscopy to quantify dye concentration, and current-voltage device characterizations to assess energy conversion efficiency, as well as open-circuit voltage decay measurements and quantum efficiency to examine electron collection efficiency. A significant result is that using the dye N-749 in a solvent that includes supercritical carbon dioxide leads to energy conversion efficiencies that are higher for devices with a thick 20 μm semiconductor film than for the case of devices with thinner films, including the 10 μm film thickness that is traditionally considered an upper threshold. The supercritical-fluid method for the N-719 dye also enabled shorter impregnation duration than more conventional classical Dip Methods.

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“…Many approaches, including the use of particular cell materials [1,2], the design of cell structures [3,4], the use of modules [5,6], and the concentration PV collector systems [7,8], have been developed to increase the efficiency of the generation of solar electricity. However, few studies have addressed the effects of the solar module encapsulation, which has been widely applied and typically involves optical and electrical losses.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Solar Module Encapsulant Lamination by Optical Constant Determination of Ethylene-Vinyl Acetate

Chen

Peng

Cho

et al. 2015

International Journal of Photoenergy

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This investigation elucidates the physical properties of ethylene-vinyl acetate (EVA) used in the lamination process of module encapsulation and the module performance from the optical transmission to the photoelectric power. In module encapsulation, the effects of the lamination parameters on the module performance, transmittance, and stack adhesion have been considered as they were found to influence the reliability of the module. The determination of the optical constants of EVA may serve as a nondestructive analytical method for optimizing the module encapsulation, on the basis of its effects on the optical transmittance, gel content, peel strength, and performance power.

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Photovoltaic performance of dye-sensitized solar cells stained with black dye under pressurized condition and mechanism for high efficiency

Cited by 20 publications

References 21 publications

Minimizing Energy Losses in Dye‐Sensitized Solar Cells Using Coordination Compounds as Alternative Redox Mediators Coupled with Appropriate Organic Dyes

Minimizing Energy Losses in Dye‐Sensitized Solar Cells Using Coordination Compounds as Alternative Redox Mediators Coupled with Appropriate Organic Dyes

Effect of Solvent, Dye-Loading Time, and Dye Choice on the Performance of Dye-Sensitized Solar Cells

Optimization of Solar Module Encapsulant Lamination by Optical Constant Determination of Ethylene-Vinyl Acetate

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