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Artículo

Photoinjection of High Potential Holes into Cu5Ta11O30 Nanoparticles by Porphyrin Dyes

Sullivan, Ian; Brown, Chelsea L.; Llansola Portolés, Manuel JoseIcon ; Gervaldo, Miguel AndresIcon ; Kodis, Gerdenis; Moore, Thomas A.; Gust, Devens; Moore, Ana L.; Maggard, Paul A.
Fecha de publicación: 09/2015
Editorial: American Chemical Society
Revista: Journal of Physical Chemistry C
ISSN: 1932-7447
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
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Resumen

Excited-state hole injection into the valence band of Cu5Ta11O30 nanoparticles (NP-Cu5Ta11O30) was investigated through sensitization with zinc porphyrin dyes using simulated solar irradiance. The Cu5Ta11O30 nanoparticles were prepared by a flux-mediated synthesis and found to have an average particle size of ∼10-15 nm by DLS and TEM. The zinc 4-(10,15,20-tris(4-pyridinyl)-porphin-5-yl)phenylphosphonic acid (D1) and its analogue, in which the pyridine groups are methylated (D2), were synthesized and found to have excited-state reduction potentials appropriate for p-type dye sensitization of the nanoparticles. The dye-sensitized NP-Cu5Ta11O30 exhibited fluorescence quenching consistent with electron transfer from the NP-Cu5Ta11O30 to the dye; forward and recombination rates were obtained by transient absorption measurements. Hole injection times of 8 ps and <100 fs were observed for D1 and D2, respectively. Nanoparticulate films of Cu5Ta11O30 were prepared and evaluated in dye-sensitized solar cells under simulated solar irradiance (AM 1.5 G, 100 mW/cm2). Measurable photocurrents and open-circuit potentials (Voc) of 200 and 110 mV were observed using D1 and D2, respectively.
Palabras clave: Porphyrin , Hole Injection , P-Type Semiconductors
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/69391
DOI: https://dx.doi.org/10.1021/acs.jpcc.5b02174
URL: https://pubs.acs.org/doi/10.1021/acs.jpcc.5b02174
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Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Citación
Sullivan, Ian; Brown, Chelsea L.; Llansola Portolés, Manuel Jose; Gervaldo, Miguel Andres; Kodis, Gerdenis; et al.; Photoinjection of High Potential Holes into Cu5Ta11O30 Nanoparticles by Porphyrin Dyes; American Chemical Society; Journal of Physical Chemistry C; 119; 37; 9-2015; 21294-21303
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