INVESTIGADORES
BORSARELLI Claudio Dario
artículos
Título:
Photocurrent Generation in Thin SnO2 Nanocrystallime Semiconductor Film Electrodes from Photoinduced Charge Separation State in Porphyrin-C60 Dyad
Autor/es:
F. FUNGO; L. OTERO; C. D. BORSARELLI; E. N. DURANTINI; J. J. SILBER; L. SERENO
Revista:
JOURNAL OF PHYSICAL CHEMISTRY B
Editorial:
American Chemical Society
Referencias:
Año: 2002 vol. 106 p. 4070 - 4078
ISSN:
1089-5647
Resumen:
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The generation of photoelectrical effects through the
spectral sensitization of wide band gap (SnO2) nanostructured
semiconductor electrode by the excitation of a novel porphyrin-fullerene (P-C60) dyad is reported. P-C60 was synthesized from 5-(4-Amidophenyl)-10,15,20-tris(4-methoxylphenyl) porphyrin (P) linked to
1,2-dihydro-1,2-methoxyphenyl [60]-61-carboxilic acid (acid-C60) by an amide bond. Anodic photocurrents and
photovoltages are observed under visible irradiation of ITO/SnO2/P-C60 electrodes, in spite
of the fact that the porphyrin fluorescence is strongly quenched by the C60 moiety in the dyad. The
photocurrent generation quantum yield of the dyad P-C60 is around twice higher than the yield of the
porphyrin moiety at the same wavelength (Soret band). A mechanism involving the
formation of an intramolecular photoinduced charge transfer state is proposed
in order to explain the efficiency in the generation of photoelectrical effect.
