Solid Solutions of Rare Earth Cations in Mesoporous Anatase Beads and Their Performances in Dye-Sensitized Solar Cells

Cavallo, Carmen; Salleo, Alberto; Gozzi, D.; Pascasio, F. Di; Quaranta, Simone; Panetta, Riccardo; Latini, Alessandro

doi:10.1038/srep16785

Cited by 16 publications

(12 citation statements)

References 34 publications

(47 reference statements)

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“…The photoelectrochemical cells were fabricated following the same procedure used for the assembling DSSCs (Dye-Sensitized Solar Cells) as reported in our previous works [13,14,15]. A schematic representation of the assembled device is shown in Figure 1b.…”

Section: Methodsmentioning

confidence: 99%

Screen Printed Pb3O4 Films and Their Application to Photoresponsive and Photoelectrochemical Devices

2018

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A new and simple procedure for the deposition of lead (II, IV) oxide films by screen printing was developed. In contrast to conventional electrochemical methods, films can be also deposited on non-conductive substrates without any specific dimensional restriction, being the only requirement the thermal stability of the substrate in air up to 500 °C to allow for the calcination of the screen printing paste and sintering of the film. In this study, films were exploited for the preparation of both photoresponsive devices and photoelectrochemical cell photoanodes. In both cases, screen printing was performed on FTO (Fluorine-Tin Oxide glass) substrates. The photoresponsive devices were tested with I-V curves in dark and under simulated solar light with different irradiation levels. Responses were evaluated at different voltage biases and under light pulses of different durations. Photoelectrochemical cells were tested by current density–voltage (J-V) curves under air mass (AM) 1.5 G illumination, incident photon-to-current efficiency (IPCE) measurements, and electrochemical impedance spectroscopy.

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Section: Methodsmentioning

confidence: 99%

Screen Printed Pb3O4 Films and Their Application to Photoresponsive and Photoelectrochemical Devices

2018

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“…Improvements are often not well understood, but have been attributed to increased dye coverage [19,34], improved electron injection [28,30,35], decreased recombination [19,28,34], reduction of trap states [35,36], or increased electron diffusion [19,28,34,35]. There is considerable variation in results.…”

Section: Introductionmentioning

confidence: 93%

“…There is considerable variation in results. For example, Y and Nd have been shown to both enhance [35,37] and decrease [19,36] the efficiency in different reports. Another type of material involves upconverting [38][39][40][41][42][43][44], downconverting [25,40,[45][46][47][48][49][50], or dual-mode [51] luminescent rare earth nanostructures, which allow improved light collection efficiency when incorporated into the TiO 2 photoanode in DSSCs.…”

Section: Introductionmentioning

confidence: 97%

Increased efficiency of dye-sensitized solar cells by addition of rare earth oxide microparticles into a titania acceptor

Luitel

Fernando

Tatum

et al. 2016

Electrochimica Acta

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Please cite this article as: Tulashi Luitel, Kasun Fernando, Brandon S.Tatum, Bruce W.Alphenaar, Francis P.Zamborini, Increased efficiency of dye-sensitized solar cells by addition of rare earth oxide microparticles into a titania acceptor, Electrochimica Acta http://dx. GRAPHICAL Abstract ABSTRACTThe addition of 400 micron scale rare-earth metal oxide particles to the TiO 2 nanoparticle acceptor layer of a dye-sensitized solar cell (DSSC) dramatically increases the efficiency of the solar cell by 10-30%. Oxidized neodymium powder, Nd 2 O 3 , combined with TiO 2 nanoparticles forms a composite photoanode containing a wide range of Nd 2 O 3 particle sizes. Based on absorbance measurements, the dye-uptake on the Nd 2 O 3 /TiO 2 anode increases substantially compared to both a standard anode and to one made from a mixture of large and small TiO 2 particles. Electrochemical impedance spectroscopy (EIS) shows a similar electron lifetime, but increased electron transport diffusion coefficient through the Nd 2 O 3 /TiO 2 composite as compared to TiO 2 only. This shows that the Nd 2 O 3 /TiO 2 composite has a lower internal resistance for charge transport. This decrease in resistance, possibly due to the filling of trap states by the Nd 2 O 3 valence or f-states, and increased dye uptake results in improved efficiency by simple incorporation of Nd 2 O 3 powder.

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“…Nb 2 O 5 photoanodes were prepared by screen printing as reported in our previous works [28][29][30]. The photoanode thickness used was of 10 ± 1 µm.…”

Section: Dssc Preparation and Assemblymentioning

confidence: 99%

“…To improve the interconnectivity of the particles and the dye-adsorption properties of the photoanodes, these were impregnated with a 0.2 M solution of Nb(OC 2 H 5 ) 5 [7]. For each Nb 2 O 5 photoanode, two different sensitizing processes were employed: the commonly used one for anatase photoanode [28][29][30], and a high-pressure process [15]. In the latter, the photoanodes were autoclaved at 90 • C for 12 h in 100 mL of sensitizing dye solution.…”

Section: Dssc Preparation and Assemblymentioning

confidence: 99%

Test of Different Sensitizing Dyes in Dye-Sensitized Solar Cells Based on Nb2O5 Photoanodes

Latini

Panetta

2018

Energies

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High-performance dyes routinely employed in TiO 2 -based dye-sensitized solar cells (DSSCs) were tested in cells assembled using Nb 2 O 5 nanostructure-based photoanodes. The sensitizers were chosen among both metal-complex (two Ru-based, N749 and C106, and one Zn-based dye, DNF12) and metal-free organic dyes (DNF01, DNF11 and DNF15). Two different sensitization processes were performed: the one commonly used for TiO 2 photoanodes, and a new process relying on high pressure by autoclavation. The assembled cells were characterized by current density-voltage (J-V) curves under air mass (AM) 1.5 G illumination and in the dark, incident photon-to-current efficiency (IPCE) measurements, and electrochemical impedance spectroscopy. The tested cells show different proportional efficiencies of the dyes under investigation for Nb 2 O 5 -and TiO 2 -based devices. Furthermore, the results were compared with those obtained in our previous work using N719 anchored on Nb 2 O 5 . A remarkable efficiency value of 4.4% under 1 sun illumination was achieved by coupling the C106 dye with a nonvolatile electrolyte. This value is higher than the one attained under the same conditions by using N719.

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Solid Solutions of Rare Earth Cations in Mesoporous Anatase Beads and Their Performances in Dye-Sensitized Solar Cells

Cited by 16 publications

References 34 publications

Screen Printed Pb3O4 Films and Their Application to Photoresponsive and Photoelectrochemical Devices

Screen Printed Pb3O4 Films and Their Application to Photoresponsive and Photoelectrochemical Devices

Increased efficiency of dye-sensitized solar cells by addition of rare earth oxide microparticles into a titania acceptor

Test of Different Sensitizing Dyes in Dye-Sensitized Solar Cells Based on Nb2O5 Photoanodes

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