Direct synthesis of natural dye mixed titanium dioxide nano particles by sol–gel method for dye sensitized solar cell applications

Steephen, Ananth; Arumanayagam, T.; Vivek, P.; Murugakoothan, P.

doi:10.1016/j.ijleo.2013.07.018

Cited by 47 publications

(22 citation statements)

References 21 publications

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“…Thus, the electron injection process from each excited dye molecule to the TiO 2 conduction band and the subse− quent dye regeneration are energetically permissible. The energy levels of the ground state (HOMO) of all azo dyes are sufficiently more positive than the I 3 -/I -redox potential [(0.42 V (vs. NHE)] [24,25], indicating that the oxidized dye formed after electron injection into the conduction band of TiO 2 could accept electrons from I -ions in the electro− lyte, thus making it thermodynamically favourable. Such electronic structures thus ensure a favourable exothermic flow of charge throughout the photo−electric conversion.…”

Section: Resultsmentioning

confidence: 99%

Characteristics of nanostructure dye-sensitized solar cells using food dyes

Hosseinnezhad

Rouhani

2016

Opto-Electronics Review

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Section: Resultsmentioning

confidence: 99%

Characteristics of nanostructure dye-sensitized solar cells using food dyes

Hosseinnezhad

Rouhani

2016

Opto-Electronics Review

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“…Absorption peak is shifting which gets suppressed when dye mixed with TiO 2 . This implies that these types of dye molecules are strongly bound to the oxide surface (Ananth et al, 2014). The quality of bonding was influenced by a homogeneous solution.…”

Section: Uv-vis Analysismentioning

confidence: 99%

“…Dye-sensitizer is important in convert the visible light into electrical energy in case of chelate to the TiO 2 surface (Smestad and Gratzel, 1998). The number of dye molecules that is absorbed by the TiO 2 is affected by the homogeneity of the mixture will determine the quality of the composite bond (Ananth et al, 2014). The quality of composite bonding can be enhanced through the synthesis method.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of dye Rhoeospathacea with concentration variation in dye-sensitized solar cells (DSSC)

Sumardiasih

Supriyanto

Cari

2017

J. Phys.: Theor. Appl.

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Dye-sensitized solar cell (DSSC) is a device that directly converts visible light into electrical energy. In this work we used dye was extracted from Rhoeo spathacea. A natural dye was directly mixed with TiO 2 anatase to obtain dyed titanium dioxide which can be used as photoanode for DSSC by varying the volume of dye. The first variation is 2 ml dye mixed with 1 ml of TiO 2 , and the second variation is 3 ml dye mixed with 1 ml of TiO 2 . The absorbance spectra of the dye and dye titanium dioxide have been investigated by spectroscopy UV-Visible Lambda 25 and the conversion efficiency of dye titanium dioxide used Keithley 2602A meter. The DSSC based on dye titanium dioxide with varying volume of dye showed that the efficiency of the the second variation is 0,033% which is higher than the first variation (0,023%) as obtained from I-V characterization.

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“…where F(R ∞ ) is the so-called remission parameter or Kubelka-Munk function, hυ is the incident photon energy, A is a constant depending on the transition probability, and the diffuse reflectance R ∞ , R ∞ is the diffuse reflectance that is obtained from R ∞ = R sample /R standard [38,39].…”

Section: Optical Propertiesmentioning

confidence: 99%

A Modified Thermal Treatment Method for the Up-Scalable Synthesis of Size-Controlled Nanocrystalline Titania

et al. 2016

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Considering the increasing demand for titania nanoparticles with controlled quality for various applications, the present work reports the up-scalable synthesis of size-controlled titanium dioxide nanocrystals with a simple and convenient thermal treatment route. Titanium dioxide nanocrystals with tetragonal structure were synthesized directly from an aqueous solution containing titanium (IV) isopropoxide as the main reactant, polyvinyl pyrrolidone (PVP) as the capping agent, and deionized water as a solvent. With the elimination of the drying process in a thermal treatment method, an attempt was made to decrease the synthesis time. The mixture directly underwent calcination to form titanium dioxide (TiO 2 ) nanocrystalline powder, which was confirmed by FT-IR, energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD) analysis. The control over the size and optical properties of nanocrystals was achieved via variation in calcination temperatures. The obtained average sizes from XRD spectra and transmission electron microscopy (TEM) images showed exponential variation with increasing calcination temperature. The optical properties showed a decrease in the band gap energy with increasing calcination temperature due to the enlargement of the nanoparticle size. These results prove that direct calcination of reactant solution is a convenient thermal treatment route for the potential large-scale production of size-controlled Titania nanoparticles.

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Direct synthesis of natural dye mixed titanium dioxide nano particles by sol–gel method for dye sensitized solar cell applications

Cited by 47 publications

References 21 publications

Characteristics of nanostructure dye-sensitized solar cells using food dyes

Characteristics of nanostructure dye-sensitized solar cells using food dyes

Fabrication of dye Rhoeospathacea with concentration variation in dye-sensitized solar cells (DSSC)

A Modified Thermal Treatment Method for the Up-Scalable Synthesis of Size-Controlled Nanocrystalline Titania

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