Improvement of Short‐Circuit Current Density in Dye‐Sensitized Solar Cells Using Sputtered Nanocolumnar TiO<sub>2</sub> Compact Layer

Chen, Lung-Chien; Chen, Cheng-Chiang; Tseng, Bo-Shiang

doi:10.1155/2010/374052

Cited by 6 publications

(2 citation statements)

References 23 publications

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“…The peaks at 30.5, 35.4, 51, and 60.5°show similar profiles and were dominated by peaks from the ITO substrate. 22,23 The peak at around 2θ ∼ 21.5°b elongs to the WO 3 structure 24 and overlapped the peaks of PEDOT 25 and anatase TiO 2 26 in the hybrid structures. Note that the broad diffraction peaks for the hybrids are not very strong because of the back signals of ITO substrate suppression.…”

Section: Resultsmentioning

confidence: 94%

Solid State Electrochromic Devices of Plasma Modified WO₃Hybrids

Kiristi¹,

Bozduman²,

Öksüz³

et al. 2014

Ind. Eng. Chem. Res.

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Electrochromic (EC) properties of tungsten trioxide (WO 3 ) was improved with preparing hybrids of tungsten trioxide−titanium dioxide (WO 3 −TiO 2 ) and tungsten trioxide−poly(3,4-ethylenedioxythiophene) (WO 3 −PEDOT) by a rotating capacitively coupled radio frequency (rf 13.56 MHz) plasma reactor. Energy-dispersive X-ray spectroscopy mapping results indicated that TiO 2 and PEDOT were coated homogeneously onto the surface of the WO 3 powders. Thin films of hybrid powders have been prepared by the physical vapor deposition method of the electron beam evaporation technique. Redox potentials, optical contrast at 700 nm, and durability during 2000 cycles of EC devices were investigated, comparatively. Hybrids of WO 3 indicated excellent coloration efficiency (cm 2 C −1 ) and switching speed values compared with untreated WO 3 . The coloration efficiency values were found to be 85.88 and 41.61 cm 2 C −1 of WO 3 −TiO 2 and WO 3 −PEDOT, respectively. The switching speed of WO 3 (13.3 s, from bleached state to colored state) increased to 1.4 s for WO 3 −TiO 2 .

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Section: Resultsmentioning

confidence: 94%

Solid State Electrochromic Devices of Plasma Modified WO₃Hybrids

Kiristi¹,

Bozduman²,

Öksüz³

et al. 2014

Ind. Eng. Chem. Res.

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“…Some minuscule peaks which cannot be indexed are due to impurities of purchased TiO 2 .The anatase phase has greater photoactivity, band gap, refractive index, and electron diffusion coefficient while the rutile is more thermally stable, and can absorb blue light [34]. Regardless of the exact reasons, studies have shown that the TiO 2 anatase phase is a better photocatalytic agent than the rutile phase [35][36][37].For this experiment, the crystallite size was found to be 31.7 nm for the anatase (101) peak using equation ( 3). Smaller crystallite sizes can have a higher surface area that helps dye particles to adhere and as a result can improve cell performance [38,39].…”

Section: X-ray Diffraction (Xrd) Data Analysismentioning

confidence: 99%

Locally Available Natural Dyes for Dyesensitized Solar Cells

Karmakar

Zaman

Hossain

et al. 2023

Dhaka Uni. J. of Applied Sci. and Eng.

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Different types of natural dyes are commonly used to fabricate dyesensitized solar cells which are cheaper, simpler, and environmentally friendlier than conventional crystalline silicon solar cells. This paper objectifies the performance of locally grown natural dyes from Dhaka, Bangladesh using a simple fabrication design. Four natural dyes were obtained separately from spinach, turmeric, pomegranate, and beetroot which contain chlorophyll, curcumin, anthocyanin, and betanin pigments respectively. Ultraviolet-visible spectroscopy illustrated the optical properties of these dyes diluted in ethanol. Spinach and turmeric extracts showed sharper absorption peaks which qualify them as better sensitizers than pomegranate and beetroot extracts. Photoanodes (of thickness 15-20 μm) were prepared by employing the doctor blade technique on fluorine-doped tin oxides using TiO2 nanoparticles of anatase form and graphite coated fluorine-doped tin oxides were used as counter electrodes. The photoelectric measurements of the fabricated cells were done under air mass (AM) 1.5 and power density of 100 mW/cm2. The fabricated cell of turmeric extracted dye showed the highest efficiency of 0.031% (Open circuit voltage, VOC = 380 mV, Short circuit current density, JSC = 0.234 mA/cm2) and the cell using beetroot extract gave the highest fill factor (FF) of about 50% among the prepared dyesensitized solar cells. DUJASE Vol. 7(1) 38-44, 2022 (January)

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Investigation on the Performance of Reduced Graphene Oxide as Counter Electrode in Dye Sensitized Solar Cell Applications

Palled¹,

Sundaramoorthy²,

Chandra³

et al. 2018

Phys. Status Solidi A

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In dye sensitized solar cells (DSSC), the counter electrode (CE) plays a significant role in electro catalytic reaction in redox region to achieve maximum power conversion efficiency (PCE) of the DSSC. The graphene oxide (GO) is synthesized by Hummer's method and converted to reduced graphene oxide (RGO) by thermal method. The effect of binders such as NMP, PVP, and nafion for RGO are investigated. The field emission scanning electron microscope (FESEM) of RGO shows the fine layers like structure. The surface area of the RGO is found to be 110.16 m2 g−1 by Brunauer–Emmett–Teller (BET) method and pore volume 0.5182 cm3 g−1 of RGO by Barrett–Joyner–Halenda (BJH) method. The Raman spectra is used to analyze the structural defects and changes of GO and RGO. The crystallite size of GO is 18.6 nm, and RGO is 20.9 nm calculated from the Raman spectrum. For analyzing the electro catalytic properties of the RGO/NMP/PVP, RGO/NMP, and RGO/nafion based CE materials cyclic voltammetry is performed and its maximum current density was measured. The composition of RGO/NMP/PVP based CE exhibits better electro‐catalytic properties when compared to other RGO/NMP and RGO/nafion based counter electrodes. Maximum PCE exhibited by RGO/NMP/PVP CE based DSSC is 5.8%.

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Improvement of Short‐Circuit Current Density in Dye‐Sensitized Solar Cells Using Sputtered Nanocolumnar TiO₂ Compact Layer

Cited by 6 publications

References 23 publications

Solid State Electrochromic Devices of Plasma Modified WO₃Hybrids

Solid State Electrochromic Devices of Plasma Modified WO₃Hybrids

Locally Available Natural Dyes for Dyesensitized Solar Cells

Investigation on the Performance of Reduced Graphene Oxide as Counter Electrode in Dye Sensitized Solar Cell Applications

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Improvement of Short‐Circuit Current Density in Dye‐Sensitized Solar Cells Using Sputtered Nanocolumnar TiO2 Compact Layer

Cited by 6 publications

References 23 publications

Solid State Electrochromic Devices of Plasma Modified WO3Hybrids

Solid State Electrochromic Devices of Plasma Modified WO3Hybrids

Locally Available Natural Dyes for Dyesensitized Solar Cells

Investigation on the Performance of Reduced Graphene Oxide as Counter Electrode in Dye Sensitized Solar Cell Applications

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Product

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Improvement of Short‐Circuit Current Density in Dye‐Sensitized Solar Cells Using Sputtered Nanocolumnar TiO₂ Compact Layer

Solid State Electrochromic Devices of Plasma Modified WO₃Hybrids

Solid State Electrochromic Devices of Plasma Modified WO₃Hybrids