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Titolo:
Self-aggregates of synthetic zinc chlorins as the photosensitizer on carbon paste electrodes for a novel solar cell
Autore:
Kureishi, Y; Shiraishi, H; Tamiaki, H;
Indirizzi:
Ritsumeikan Univ, Fac Sci & Engn, Dept Biosci & Biotechnol, Shiga 5258577,Japan Ritsumeikan Univ Shiga Japan 5258577 i & Biotechnol, Shiga 5258577,Japan Ritsumeikan Univ, Dept Chem, Shiga 5258577, Japan Ritsumeikan Univ ShigaJapan 5258577 iv, Dept Chem, Shiga 5258577, Japan
Titolo Testata:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
fascicolo: 1-2, volume: 496, anno: 2001,
pagine: 13 - 20
Fonte:
ISI
Lingua:
ENG
Soggetto:
GREEN PHOTOSYNTHETIC BACTERIA; ENERGY-TRANSFER; ARTIFICIAL PHOTOSYNTHESIS; PORPHYRIN; EFFICIENCY; DYADS; CHLOROSOMES; MONOLAYER; QUINONES; ANTENNA;
Keywords:
carbon paste electrode; chlorophyll modified electrode; electron transfer; photocurrent spectroscopy; self-assembly;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Tamiaki, H Ritsumeikan Univ, Fac Sci & Engn, Dept Biosci & Biotechnol, Shiga 5258577,Japan Ritsumeikan Univ Shiga Japan 5258577 nol, Shiga 5258577,Japan
Citazione:
Y. Kureishi et al., "Self-aggregates of synthetic zinc chlorins as the photosensitizer on carbon paste electrodes for a novel solar cell", J ELEC CHEM, 496(1-2), 2001, pp. 13-20

Abstract

To investigate a dye-based solar cell, a naturally occurring chlorophyll analogue (chlorin 1) modified electrode was prepared. Synthetic zinc chlorin1 easily self-aggregated to form supramolecules (1)(n) in non-polar organic solvents as well as in the thin film. The photocurrent of the electrode modified with self-aggregated chlorin (1)(n) (CE1) was measured in the rangefrom - 300 to 300 mV (vs. Ag \ Ag+) by irradiation with > 510 nm light. Below 100 mV of the bias potential, cathodic photocurrents of CE1 were observed in an aqueous solution of 0.1 M 2-(N-morpholino)ethanesulfonic acid + 0.1 M Na2SO4 at pH 6.7. The photocurrent action spectrum of CE1 was similar to the visible absorption spectrum of (1), on a Pyrex plate, indicating thatthe photoexcited slate of zinc chlorin aggregates (1)(n)* played a role asa photosensitizer on CE1 with a wide band of longer wavelength light. An oxygen molecule dissolved in an aqueous solution was an electron acceptor; electron transfer from (1)(n)* to O-2 at the interface between the carbon paste electrode and the aqueous solution yielded the cathodic photocurrent. The quantum yield for CE1 was estimated to be 0.09% (730 nm). The value was larger than the quantum yield for the carbon paste electrode modified with monomeric zinc chlorin 3 (CE3), 0.01% (660 nm). These results indicate thatself-aggregation of zinc chlorin (1)(n) made an efficient photosensitizer of solar cells and utilized up to 800 nm light. (C) 2001 Elsevier Science B. V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 07:25:26