A four-functional composite-hierarchical anatase TiO 2  microsphere consisting of nanoparticles, nanowires and submicron ellipsoidal spheres for Dye Sensitized Solar Cells

Huang, Niu; Chen, Feitai; Sun, Panpan; Sun, Xiaohua; Sebo, Bobby; Zhao, Xingzhong

doi:10.1016/j.electacta.2014.07.048

Cited by 11 publications

(2 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the dual role of dual morphological nanomaterials support for better electron mobility and diffusion of electrolyte can improve performance of DSSC [38]. Dual morphology nanomaterials have been represented in some previously reported articles as nanocomposites [32], [39]. Liang et al employed hydrothermal method to prepare anatase TiO2 microspheres with interconnected nanoparticles, which offered a photovoltaic conversion efficiency of 7.13% at an optimum thickness of 14.5 µm [40].…”

Section: Introductionmentioning

confidence: 99%

Dual morphology titanium dioxide for dye sensitized solar cells

Selvapriya

Mayandi

Ragavendran

et al. 2019

Ceramics International

View full text Add to dashboard Cite

Anatase TiO2 displaying dual morphologies were synthesized with a simple chemical route via a single step. A strong correlation between the dye sensitized solar cell (DSSC) device performance and the obtained dual morphologies are highlighted using relevant evidences from UV-vis and diffuse reflectance spectroscopy (DRS), Raman analysis, field emission scanning electron microscope, high resolution transmission electron microscope, current-voltage characteristics and impedance analysis. Structural investigation revealed that the interested medium in this work employed for the synthesis of TiO2 produced different types of dual morphologies such as nanospheres with nanoparticles (NSNP), microsphere decorated with nanoparticles (μSNP) and nanoparticles with stone like features (NPS). UVvis and DRS results indicated the ability of the materials to assist with diffused reflectance and optical absorption of the screen printed photoanodes. In addition, an investigation of Raman vibrational characteristics was carried out in detail using synchronous and asynchronous 2D correlation analysis. The high intense Eg anatase mode of Raman spectrum was simulated using a phonon confinement model and its normalised spectra are compared with an experimental data. The resultant performances in the DSSCs were not indicative by the material properties; so, the charge transfer resistance (Rct) and recombination properties of the photoanode were investigated. These results showed that the Nyquist plot of NSNP possesses the smallest diameter, which reveals that the device based on NSNP offers the lowest Rct value that accounts for the higher conversion efficiencies when compared with the DSSC device based on photoanodes μSNP and NSP. It can be concluded that the improved power conversion efficiency shown by photoanode fabricated using NSNP has the dual role of optimum surface area for dye loading and light scattering centres. These properties, when optimized along with the offered pathway for electrolyte diffusion to the dye degeneration with less Rct, could lead to better photoelectric conversion efficiency.

show abstract

Section: Introductionmentioning

confidence: 99%

Dual morphology titanium dioxide for dye sensitized solar cells

Selvapriya

Mayandi

Ragavendran

et al. 2019

Ceramics International

View full text Add to dashboard Cite

show abstract

“…8 A second approach is to design multifunctional hierarchical structures such as branched or 3D morphologies that are particularly advantageous in surface area, light scattering and charge transport. [38][39][40][41][42][43] A third approach is to form layered structures, which generally consist of an active layer and a top scattering layer. The active layer is usually composed of conventional NPs or a 1D NW array, and the top scattering layer can be 3D mesoporous beads, spherical aggregates, fibrous nanowires and hollow spherical structures.…”

Section: Introductionmentioning

confidence: 99%

Bilayer TiO₂photoanode consisting of a nanowire–nanoparticle bottom layer and a spherical voids scattering layer for dye-sensitized solar cells

et al. 2015

Self Cite

View full text Add to dashboard Cite

1Structural design of TiO 2 photoanode is proved to be a useful approach in improving the 2 energy conversion efficiency of dye-sensitized solar cells (DSSCs). Herein, bilayer TiO 2 3 photoanode consisting of rutile nanowires (NWs) infiltrated with anatase nanoparticles 4 (NPs) as bottom layer, and spherical voids (450nm) in NP film as top layer is prepared 5 via a simple one-time spray technique on 1D TiO 2 NW array. The bilayer structure 6 exhibits excellent dye-loading property and efficient light scattering ability, as confirmed 7 by dye-desorption, diffuse transmittance and reflectance spectra, and incident-photon-to-8 current conversion efficiency (IPCE) results. As a result, DSSC based on the bilayer 9 photoanode ((1.6+2.6) μm) exhibits a remarkably 3.2 times and 3.5 times higher 10 photocurrent output and overall energy conversion efficiency than 1D TiO 2 NW device 11 (1.6μm), under AM 1.5G simulated solar irradiation. The enhanced device performance 12 can be ascribed to the synergistic effect of a large surface area for sufficient dye-loading, 13 efficient light scattering for sufficient light harvesting, fast charge transport for efficient 14 charge collection and highly porous structure of the spherical voids top layer for fast 15 diffusion of I -/I 3 electrolyte in the bilayer TiO 2 photoanode. This study provides a facile 16 route toward improving the photovoltaic performance of 1D TiO 2 NW array solar cells 17 based on constructing bilayer structure via a simple one-time spray technique. 18 19

show abstract

Thermal Evaporation of Sb₂Se₃ as Novel Counter Electrode for Dye‐Sensitized Solar Cells

Sun

et al. 2016

ChemistrySelect

View full text Add to dashboard Cite

Sb2Se3 was fabricated with a facile atmospheric pressure thermal evaporation procedure as counter electrode (CE) for dye‐sensitized solar cells (DSSCs). The introduction of a carbon nanoparticle (CNP) film as substrate was proved to facilitate Sb2Se3 deposition, resulting in the formation of a Sb2Se3 layer on the surface of carbon nanoparticles (denoted as CNP‐Sb2Se3). Electrochemical characterizations demonstrate the intrinsic catalytic ability of Sb2Se3 and better electrocatalytic activity and stability of Sb2Se3 deposited on CNP film in catalyzing I3‐ reduction. Evaporation temperature was found to affect the electrocatalytic activity of CNP‐Sb2Se3 and a lower temperature of 400oC was proved to be better in our case. As a result, the best performing DSSC with CNP‐Sb2Se3 CE yields a power conversion efficiency of 6.26%, which is comparable to that based on Pt CE (6.47%).

show abstract

A four-functional composite-hierarchical anatase TiO 2 microsphere consisting of nanoparticles, nanowires and submicron ellipsoidal spheres for Dye Sensitized Solar Cells

Cited by 11 publications

References 35 publications

Dual morphology titanium dioxide for dye sensitized solar cells

Dual morphology titanium dioxide for dye sensitized solar cells

Bilayer TiO₂photoanode consisting of a nanowire–nanoparticle bottom layer and a spherical voids scattering layer for dye-sensitized solar cells

Thermal Evaporation of Sb₂Se₃ as Novel Counter Electrode for Dye‐Sensitized Solar Cells

Contact Info

Product

Resources

About

A four-functional composite-hierarchical anatase TiO 2 microsphere consisting of nanoparticles, nanowires and submicron ellipsoidal spheres for Dye Sensitized Solar Cells

Cited by 11 publications

References 35 publications

Dual morphology titanium dioxide for dye sensitized solar cells

Dual morphology titanium dioxide for dye sensitized solar cells

Bilayer TiO2photoanode consisting of a nanowire–nanoparticle bottom layer and a spherical voids scattering layer for dye-sensitized solar cells

Thermal Evaporation of Sb2Se3 as Novel Counter Electrode for Dye‐Sensitized Solar Cells

Contact Info

Product

Resources

About

Bilayer TiO₂photoanode consisting of a nanowire–nanoparticle bottom layer and a spherical voids scattering layer for dye-sensitized solar cells

Thermal Evaporation of Sb₂Se₃ as Novel Counter Electrode for Dye‐Sensitized Solar Cells