Silver-loaded anatase nanotubes dispersed plasmonic composite photoanode for dye-sensitized solar cells

Dong, Hua; Gao, Yucui; El‐Shafei, Ahmed; Ning, Shuya; Xi, Jun; Jiao, Bo; Hou, Xun

doi:10.1016/j.orgel.2014.08.020

Cited by 18 publications

(7 citation statements)

References 25 publications

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“…The electrons in Ag NPs then move to the CB of TiO 2 due to the SPR effect, while the Schottky barrier at the Ag/TiO 2 junction inhibits the backward diffusion of electrons to the dye or the electrolyte. As a result, the recombination of electrons and holes is significantly reduced, and the efficiency is increased 41 . A comparison of the photovoltaic performance of DSSC based on different photoanodes at standard conditions are shown in Table 1 , while Table 2 shows the best photovoltaic performances of DSSCs based on different photoanodes.…”

Section: Resultsmentioning

confidence: 99%

A photoanode with hierarchical nanoforest TiO2 structure and silver plasmonic nanoparticles for flexible dye sensitized solar cell

Choudhury

Lin

Shawon

et al. 2021

Sci Rep

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Due to unique photovoltaic properties, the nanostructured morphologies of TiO2 on flexible substrate have been studied extensively in the recent years for applications in dye sensitized solar cells (DSSCs). Microstructured electrode materials with high surface area can facilitate rapid charge transport and thus improve the light-to-current conversion efficiency. Herein we present an improved photoanode with forest like photoactive TiO2 hierarchical microstructure using a simple and facile hydrothermal route. To utilize the surface plasmon resonance (SPR) and hence increase the photon conversion efficiency, a plasmonic nanoparticle Ag has also been deposited using a very feasible photoreduction method. The branched structure of the photoanode increases the dye loading by filling the space between the nanowires, whereas Ag nanoparticles play the multiple roles of dye absorption and light scattering to increase the light-to-current conversion efficiency of the device. The branched structure provides a suitable matrix for the subsequent Ag deposition. They improve the charge collection efficiency by providing the preferential electron pathways. The high-density Ag nanoparticles deposited on the forest like structure also decrease the charge recombination and therefore improve the photovoltaic efficiency of the cells. As a result, the DSSC based on this novel photoanode shows remarkably higher photon conversion efficiency (ηmax = 4.0% and ηopt = 3.15%) compared to the device based on pristine nanowire or forest-like TiO2 structure. The flexibility of the device showed sustainable and efficient performance of the microcells.

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Section: Resultsmentioning

confidence: 99%

A photoanode with hierarchical nanoforest TiO2 structure and silver plasmonic nanoparticles for flexible dye sensitized solar cell

Choudhury

Lin

Shawon

et al. 2021

Sci Rep

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“…The most employed incorporation method is to blend as-prepared plasmonic nanostructures into the precursor paste of the mesoporous TiO 2 and cast the mixture onto the substrates [102,118,119,120,121,122,123,124,125,126,127,128,129]. After heat treatment, the plasmonic particles can be dispersed into the mesoporous layer and function as light harvesting and charge separation sites.…”

Section: Plasmonic Photovoltaicsmentioning

confidence: 99%

“…Thirdly, the strong electromagnetic field upon LSPR excitation can promote the charge carrier generation and separation of the neighboring matters, which reduces the energy loss from recombination [2,118,122,123,125,131]. Finally, it is noteworthy that the incorporation of plasmonic structures often results in open-circuit voltage increase [118,120,121,122,124,125,127,131,135,137,138,142]. This was attributed to the charging effect of the plasmonic metals, which shifted the Fermi level of the photoanode to a higher level relative to the redox potential of the electrolyte [7].…”

Section: Plasmonic Photovoltaicsmentioning

confidence: 99%

Recent Development of Plasmonic Resonance-Based Photocatalysis and Photovoltaics for Solar Utilization

Fan

Leung

2016

Molecules

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Increasing utilization of solar energy is an effective strategy to tackle our energy and energy-related environmental issues. Both solar photocatalysis (PC) and solar photovoltaics (PV) have high potential to develop technologies of many practical applications. Substantial research efforts are devoted to enhancing visible light activation of the photoelectrocatalytic reactions by various modifications of nanostructured semiconductors. This review paper emphasizes the recent advancement in material modifications by means of the promising localized surface plasmonic resonance (LSPR) mechanisms. The principles of LSPR and its effects on the photonic efficiency of PV and PC are discussed here. Many research findings reveal the promise of Au and Ag plasmonic nanoparticles (NPs). Continual investigation for increasing the stability of the plasmonic NPs will be fruitful.

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“…18 Among two-dimensional anisotropic anatase nanostructures, TiO2 nanoplatelets with exposed {001} facets have been theoretically and experimentally shown to exhibit superior performances in many photocatalytic applications, [19][20][21] including plasmon enhanced photocatalysis. [22][23][24] Despite the intensive research on the controlled synthesis of the platelets, electronic and optical characterization are still missing at the nanoscale.…”

Section: Numerous Theoretical and Experimental Veels Investigations Omentioning

confidence: 99%

Probing the size dependence on the optical modes of anatase nanoplatelets using STEM-EELS

et al. 2016

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†Electronic supplementary information (ESI) available: Histograms of length and thickness of the platelets; perpendicular component of dielectric function; thickness dependence of perpendicular component of loss function; VEEL spectra of edge-on platelet along c-axis; VEEL spectra of face-on and edge platelets stacks. 2 AbstractAnatase titania nanoplatelets predominantly exposing {001} facets have been reported to have enhanced catalytically properties in comparison to bulk anatase. To understand their unusual behaviour, it is essential to fully characterize their electronic and optical properties at the nanometer scale. One way of accessing these fundamental properties is to study the dielectric function. Valence electron energy-loss spectroscopy (EELS) performed in the scanning transmission electron microscope (STEM) is the only analytical method that can probe the complex dielectric function with both high energy (< 100 meV) and high spatial (< 1 nm) resolution. By correlating experimental STEM-EELS data with simulations based on semiclassical dielectric theory, the dielectric response of thin (< 5 nm) anatase nanoplatelets was found to be largely dominated by characteristic (optical) surface modes, which are linked to surface plasmon modes of anatase. For platelets less than 10 nm thick, the frequency of these optical modes varies according to their thickness. This unique optical behaviour prompts the enhancement of light absorption in the ultraviolet regime. Finally, the effect of finite size on the dielectric signal is gradually lost by stacking consistently two or more platelets in a specific crystal orientation, and eventually suppressed for large stacks of platelets.

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Silver-loaded anatase nanotubes dispersed plasmonic composite photoanode for dye-sensitized solar cells

Cited by 18 publications

References 25 publications

A photoanode with hierarchical nanoforest TiO2 structure and silver plasmonic nanoparticles for flexible dye sensitized solar cell

A photoanode with hierarchical nanoforest TiO2 structure and silver plasmonic nanoparticles for flexible dye sensitized solar cell

Recent Development of Plasmonic Resonance-Based Photocatalysis and Photovoltaics for Solar Utilization

Probing the size dependence on the optical modes of anatase nanoplatelets using STEM-EELS

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