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Volumn 111, Issue 36, 2007, Pages 13618-13626

Hydrogen-bonding effects on film structure and photoelectrochemical properties of porphyrin and fullerene composites on nanostructured TiO 2 electrodes

Author keywords

[No Author keywords available]

Indexed keywords

ATOMIC FORCE MICROSCOPY; FULLERENES; HYDROGEN BONDS; INFRARED RADIATION; NANOSTRUCTURED MATERIALS; PHOTOVOLTAIC EFFECTS; PORPHYRINS; ULTRAVIOLET VISIBLE SPECTROSCOPY;

EID: 34748850771     PISSN: 19327447     EISSN: 19327455     Source Type: Journal    
DOI: 10.1021/jp0726079     Document Type: Article
Times cited : (53)

References (125)
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    • Sun. S. S, Sariciftci. N. S, Eds, CRC: Boca Raton, FL
    • (a) Organic Photovoltaics; Sun. S. S., Sariciftci. N. S., Eds.; CRC: Boca Raton, FL, 2005.
    • (2005) Organic Photovoltaics
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    • Organic Photovoltaics; Brabec, C., Dyakonov, V., Parisi, J., Sariciftci, N. S., Eds.; Springer: Berlin, 2003.
    • (b) Organic Photovoltaics; Brabec, C., Dyakonov, V., Parisi, J., Sariciftci, N. S., Eds.; Springer: Berlin, 2003.
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    • Van. Duren. J. K. J.; Yang. X.; Loos. J.; Bulle-Lieuwma, C. W. T.; Sieval. A. B.; Hummelen. J. C.; Janssen. R. A. J. Adv. Funct. Mater. 2004, 14, 425.
    • (c) Van. Duren. J. K. J.; Yang. X.; Loos. J.; Bulle-Lieuwma, C. W. T.; Sieval. A. B.; Hummelen. J. C.; Janssen. R. A. J. Adv. Funct. Mater. 2004, 14, 425.
  • 105
    • 34748882973 scopus 로고    scopus 로고
    • An equimolar DMF solution, 1.0 mM of porphyrin and/or fullerene was spin-coated (rotation rate, 500 rpm for 20 s and then 2000 rpm for 40 s) onto a mica substrate, followed by evaporation in air at room temperature. This procedure was repeated three times. Finally, the mica substrate was dried in a vacuum for 2 h
    • An equimolar DMF solution ( 1.0 mM) of porphyrin and/or fullerene was spin-coated (rotation rate = 500 rpm for 20 s and then 2000 rpm for 40 s) onto a mica substrate, followed by evaporation in air at room temperature. This procedure was repeated three times. Finally, the mica substrate was dried in a vacuum for 2 h.
  • 106
    • 0035353449 scopus 로고    scopus 로고
    • We measured absorption spectra of TiO2/ZnP-acid, Coo-acid film under four different conditions, that is, in air using dry film, in acetonitrile, in electrolyte solution (acetonitrile solution containing 63 mM LiI and 1.3 mM I2, and under the photoelectrochemical conditions in which the positive potential (0.1 V versus SCE) is applied to the film that is in contact with the electrolyte solution see, Supporting Information S2, The three spectra taken in air, in acetonitrile, and in electrolyte solution revealed similar absorption with almost the same peak positions. On the other hand, the absorption spectrum under the photoelectrochemical conditions was redshifted and broadened relative to the three spectra. These results are consistent with the red shift and broadening of the action spectrum compared to the absorption spectrum in air. Moreover, CT interaction between the porphyrin and TiO2 surface as well as between the porphyrin and the C 60
    • 60 molecules may also account for the difference in the absorption and action spectra, (a) He, J.; Hagfeldt, A.; Lindquist, S-E. Langmuir 2001, 17, 2743.
  • 121
    • 34748909374 scopus 로고    scopus 로고
    • 2).
    • 2).
  • 122
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    • -2) for the adsorption time of 12 h.
    • -2) for the adsorption time of 12 h.
  • 123
    • 34748817388 scopus 로고    scopus 로고
    • ZnP-acid and C60-acid were also assembled onto the TiO 2 electrode modified with the C60-acid molecules by immersing the pretreated TiO2 electrode into the DMF solution of ZnP-acid and C60-acid. The IPCE values are similar ZnP-acid, C 60-acid system, 37, ZnP-acid, Gso-ester system, 36, ZnP-acid system, 34, input power, 68 μW cm-2; ex, 444 nm; applied potential, 0.10 V versus SCE, Thus, the hydrogen-bonding effects on the IPCE values are minor in this assembly method due to the direct adsorption of ZnP-acid onto the TiO2 surface through the carboxylic acid
    • 2 surface through the carboxylic acid.
  • 124
    • 34748832164 scopus 로고    scopus 로고
    • The estimation of the absorbed photon-to-current efficiency (APCE) at the Q-band region, where the absorbance of the film is low (<0.1), may contain large experimental error because of the small absorbance and the red shift of action spectrum compared with the absorption spectrum. On the other hand, the absorbance at the Soret band region is high so that the error in the APCE is small. Therefore, we estimated the APCE values of each electrode at 444 nm for comparison.
    • The estimation of the absorbed photon-to-current efficiency (APCE) at the Q-band region, where the absorbance of the film is low (<0.1), may contain large experimental error because of the small absorbance and the red shift of action spectrum compared with the absorption spectrum. On the other hand, the absorbance at the Soret band region is high so that the error in the APCE is small. Therefore, we estimated the APCE values of each electrode at 444 nm for comparison.
  • 125
    • 34748835750 scopus 로고    scopus 로고
    • 2 for photocurrent generation is more significant than that of the hydrogen bonding between porphyrin and fullerene.
    • 2 for photocurrent generation is more significant than that of the hydrogen bonding between porphyrin and fullerene.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.