Nanostructured Anatase Titania Spheres as Light Scattering Layer in Dye-sensitized Solar Cells

Swathy, K.S.; Abraham, P.A.; Panicker, N. Rani; Pramanik, Nimai Chand; Jacob, Karl

doi:10.1016/j.protcy.2016.05.051

Cited by 7 publications

(2 citation statements)

References 12 publications

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“…In addition, Swathy et al prepared anatase titania microspheres by a modified sol-gel method [47]. At first, they took a defined amount of titanium (IV) butoxide (TB) and ethylene glycol, which were mixed and stirred constantly for 24 hours.…”

Section: On the Methods Of Preparing Mesoporous Spheres And The Convermentioning

confidence: 99%

Synthesis of Mesoporous TiO₂ Spheres via the Solvothermal Process and Its Application in the Development of DSSC

Velázquez-Martínez

Martı́nez

Jiménez-González³

et al. 2019

Advances in Materials Science and Engineering

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This study examined the synthesis of the n-type nanostructured titanium dioxide semiconductor using a combined sol-gel/solvothermal method at 200°C, varying the concentrations of H2O and HCl used as a catalyst for the hydrolysis of the titanium isopropoxide precursor. A white powder of TiO2 nanoparticles was obtained via the solvothermal process. Scanning electron microscopy revealed a spherical morphology of the TiO2 nanoparticles, with their diameter ranging from 2 to 7 microns as the HCl concentration increases. High-resolution electron microscopy and X-ray diffraction showed that the spheres are mesoporous titanium oxide (TiO2m) composed of nanocrystals with an anatase crystalline phase whose crystallite diameter grows from 8 to 13 nm as the HCl concentration increases. On the contrary, optimizing the H2O concentration enabled a decrease in the crystallite size of TiO2m and increases in the surface area and the energy band gap of TiO2m. The enlarged surface area enabled an increase in the number of contact points between TiO2m and the dye of dye-sensitized solar cells (DSSCs), resulting in a better solar cell performance. The white powder was used to prepare a TiO2m film via the screen-printing technique, which was used in the development of DSSC. The performance parameters of the DSSC (ISC, VOC, FF, and η%) were correlated with the synthesis parameters of TiO2m. This correlation showed that H2O and HCl greatly influence the semiconductor properties of TiO2m, along with the short-circuit current JSC and the conversion efficiency η% of the DSSC.

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Section: On the Methods Of Preparing Mesoporous Spheres And The Convermentioning

confidence: 99%

Synthesis of Mesoporous TiO₂ Spheres via the Solvothermal Process and Its Application in the Development of DSSC

Velázquez-Martínez

Martı́nez

Jiménez-González³

et al. 2019

Advances in Materials Science and Engineering

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“…The PCE of the DSSC with the SnO 2 hollow fiber-added TiO 2 photoelectrode was approximately 11% higher (5.43%) than that of the DSSC with pure TiO 2 photoelectrode (4.89%). Swathy et al [27] used nanostructured (≈400 nm particle size) anatase titania spheres as the light scattering layer for DSSCs. These DSSCs showed about two times higher J sc (10.44 mA cm −2 ) and two times higher PCE (4.92%) than those of TiO 2 photoelectrodes without scattering layers ( J sc of 5.83 mA cm −2 , PCE of 2.7%).…”

Section: Introductionmentioning

confidence: 99%

Improving of the Photovoltaic Characteristics of Dye-Sensitized Solar Cells Using a Photoelectrode with Electrospun Porous TiO2 Nanofibers

Cho

Wang

et al. 2019

Nanomaterials

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Porous TiO2 nanofibers (PTFs) and dense TiO2 nanofibers (DTFs) were prepared using simple electrospinning for application in dye-sensitized solar cells (DSSCs). TiO2 nanoparticles (TNPs) were prepared using a hydrothermal reaction. The as-prepared PTFs and DTFs (with a fiber diameter of around 200 nm) were mixed with TNPs such as TNP-PTF and TNP-DTF nanocomposites used in photoelectrode materials or were coated as light scattering layers on the photoelectrodes to improve the charge transfer ability and light harvesting effect of the DSSCs. The as-prepared TNPs showed a pure anatase phase, while the PTFs and DTFs showed both the anatase and rutile phases. The TNP-PTF composite (TNP:PTF = 9:1 wt.%) exhibited an enhanced short circuit photocurrent density (Jsc) of 14.95 ± 1.03 mA cm−2 and a photoelectric conversion efficiency (PCE, η) of 5.4 ± 0.17% because of the improved charge transport and accessibility for the electrolyte ions. In addition, the TNP/PTF photoelectrode showed excellent light absorption in the visible region because of the mountainous nature of light induced by the PTF light scattering layer. The TNP/PTF photoelectrode showed the highest Jsc (16.96 ± 0.79 mA cm−2), η (5.9 ± 0.13%), and open circuit voltage (Voc, 0.66 ± 0.02 V).

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Light Scattering Materials as Photoanodes

Rajkumar

Arulraj

2019

Interfacial Engineering in Functional Materials for Dye‐Sensitized Solar Cells

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Nanostructured Anatase Titania Spheres as Light Scattering Layer in Dye-sensitized Solar Cells

Cited by 7 publications

References 12 publications

Synthesis of Mesoporous TiO₂ Spheres via the Solvothermal Process and Its Application in the Development of DSSC

Synthesis of Mesoporous TiO₂ Spheres via the Solvothermal Process and Its Application in the Development of DSSC

Improving of the Photovoltaic Characteristics of Dye-Sensitized Solar Cells Using a Photoelectrode with Electrospun Porous TiO2 Nanofibers

Light Scattering Materials as Photoanodes

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Nanostructured Anatase Titania Spheres as Light Scattering Layer in Dye-sensitized Solar Cells

Cited by 7 publications

References 12 publications

Synthesis of Mesoporous TiO2 Spheres via the Solvothermal Process and Its Application in the Development of DSSC

Synthesis of Mesoporous TiO2 Spheres via the Solvothermal Process and Its Application in the Development of DSSC

Improving of the Photovoltaic Characteristics of Dye-Sensitized Solar Cells Using a Photoelectrode with Electrospun Porous TiO2 Nanofibers

Light Scattering Materials as Photoanodes

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Product

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Synthesis of Mesoporous TiO₂ Spheres via the Solvothermal Process and Its Application in the Development of DSSC

Synthesis of Mesoporous TiO₂ Spheres via the Solvothermal Process and Its Application in the Development of DSSC