Solid solutions of the rare earth (RE) cations Pr3+, Nd3+, Sm3+, Gd3+, Er3+ and Yb3+ in anatase TiO2 have been synthesized as mesoporous beads in the concentration range 0.1-0.3% of metal atoms. The solid solutions were have been characterized by XRD, SEM, diffuse reflectance UV-Vis spectroscopy, BET and BJH surface analysis. All the solid solutions possess high specific surface areas, up to more than 100 m2/g. The amount of adsorbed dye in each photoanode has been determined spectrophotometrically. All the samples were tested as photoanodes in dye-sensitized solar cells (DSSCs) using N719 as dye and a nonvolatile, benzonitrile based electrolyte. All the cells were have been tested by conversion efficiency (J-V), quantum efficiency (IPCE), electrochemical impedance spectroscopy (EIS) and dark current measurements. While lighter RE cations (Pr3+, Nd3+) limit the performance of DSSCs compared to pure anatase mesoporous beads, cations from Sm3+ onwards enhance the performance of the devices. A maximum conversion efficiency of 8.7% for Er3+ at a concentration of 0.2% has been achieved. This is a remarkable efficiency value for a DSSC employing N719 dye without co-adsorbents and a nonvolatile electrolyte. For each RE cation the maximum performances are obtained for a concentration of 0.2% metal atoms. © 2015, Nature Publishing Group. All rights reserved.

Solid solutions of rare earth cations in mesoporous anatase beads and their performances in dye-sensitized solar cells / Cavallo, Carmen; Salleo, Alberto; Gozzi, Daniele; DI PASCASIO, Francesco; Quaranta, Simone; Panetta, Riccardo; Latini, Alessandro. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - ELETTRONICO. - 5:(2015), pp. 16785-01-16785-15. [10.1038/srep16785]

Solid solutions of rare earth cations in mesoporous anatase beads and their performances in dye-sensitized solar cells

CAVALLO, CARMEN;GOZZI, Daniele;DI PASCASIO, Francesco;PANETTA, RICCARDO;LATINI, ALESSANDRO
2015

Abstract

Solid solutions of the rare earth (RE) cations Pr3+, Nd3+, Sm3+, Gd3+, Er3+ and Yb3+ in anatase TiO2 have been synthesized as mesoporous beads in the concentration range 0.1-0.3% of metal atoms. The solid solutions were have been characterized by XRD, SEM, diffuse reflectance UV-Vis spectroscopy, BET and BJH surface analysis. All the solid solutions possess high specific surface areas, up to more than 100 m2/g. The amount of adsorbed dye in each photoanode has been determined spectrophotometrically. All the samples were tested as photoanodes in dye-sensitized solar cells (DSSCs) using N719 as dye and a nonvolatile, benzonitrile based electrolyte. All the cells were have been tested by conversion efficiency (J-V), quantum efficiency (IPCE), electrochemical impedance spectroscopy (EIS) and dark current measurements. While lighter RE cations (Pr3+, Nd3+) limit the performance of DSSCs compared to pure anatase mesoporous beads, cations from Sm3+ onwards enhance the performance of the devices. A maximum conversion efficiency of 8.7% for Er3+ at a concentration of 0.2% has been achieved. This is a remarkable efficiency value for a DSSC employing N719 dye without co-adsorbents and a nonvolatile electrolyte. For each RE cation the maximum performances are obtained for a concentration of 0.2% metal atoms. © 2015, Nature Publishing Group. All rights reserved.
dye-sensitized solar cells, solid solutions, anatase, lanthanides
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Solid solutions of rare earth cations in mesoporous anatase beads and their performances in dye-sensitized solar cells / Cavallo, Carmen; Salleo, Alberto; Gozzi, Daniele; DI PASCASIO, Francesco; Quaranta, Simone; Panetta, Riccardo; Latini, Alessandro. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - ELETTRONICO. - 5:(2015), pp. 16785-01-16785-15. [10.1038/srep16785]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/832763
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