Incorporating hydrangea-like titanium dioxide light scatterer with high dye-loading on the photoanode for dye-sensitized solar cells

Chang, Wei‐Chen; Tang, Bing-Hong; Lu, Yen-Wei; Yu, Wan-Chin; Lin, Lu‐Yin; Wu, Ren‐Jang

doi:10.1016/j.jpowsour.2016.04.055

Cited by 10 publications

(2 citation statements)

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“…2-Hydroxy-1,4-napthaquinone (C 10 H 6 O 3 ), frequently called lawsone [15,18], is one of the constituents of the natural dye henna in addition to other compounds, such as gallic acid, sterols, resin, tannin and coumarins [19]. Lawsone (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Solar cell parameters, such as open-circuit voltage ( V oc ), short-circuit current density ( J sc ) and fill factor (FF), are the most significant parameters used to evaluate the enhancement of the power conversion efficiency (PCE) of solar cells [10]. The short circuit current density, J sc , depends essentially on dye adsorption, the collection efficiency in the semiconductor thin layer film and the efficiency of the collected dye molecules [3,14–15]. The adsorption of the dye can be improved by various means, such as increasing the thickness and/or the porosity of the photoelectrode or by using organized structures, such as nanowalls or nanorods.…”

Section: Introductionmentioning

confidence: 99%

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Performance of natural-dye-sensitized solar cells by ZnO nanorod and nanowall enhanced photoelectrodes

Saadaoui

Youssef

Karoui

et al. 2017

Beilstein J. Nanotechnol.

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In this work, two natural dyes extracted from henna and mallow plants with a maximum absorbance at 665 nm were studied and used as sensitizers in the fabrication of dye-sensitized solar cells (DSSCs). Fourier transform infrared (FTIR) spectra of the extract revealed the presence of anchoring groups and coloring constituents. Two different structures were prepared by chemical bath deposition (CBD) using zinc oxide (ZnO) layers to obtain ZnO nanowall (NW) or nanorod (NR) layers employed as a thin film at the photoanode side of the DSSC. The ZnO layers were annealed at different temperatures under various gas sources. Indeed, the forming gas (FG) (N2/H2 95:5) was found to enhance the conductivity by a factor of 103 compared to nitrogen (N2) or oxygen (O2) annealing gas. The NR width varied between 40 and 100 nm and the length from 500 to 1000 nm, depending on the growth time. The obtained NWs had a length of 850 nm. The properties of the developed ZnO NW and NR layers with different thicknesses and their effect on the photovoltaic parameters were studied. An internal coverage of the ZnO NWs was also applied by the deposition of a thin TiO2 layer by reactive sputtering to improve the cell performance. The application of this layer increased the overall short circuit current J sc by seven times from 2.45 × 10−3 mA/cm2 to 1.70 × 10−2 mA /cm2.

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Section: Resultsmentioning

confidence: 99%