title: Time-resolved photocurrent generation in a photoelectrochemical cell with phthalocyanine.
abstract: The kinetics of photocurrent generated in the photoelectrochemical cell (PEC) with phthalocyanine (Pc) dyes in the microsecond time scale was discussed. The shape of the kinetics is rather complex and it was discussed in terms of molecular phenomena and electrochemical processes occurring after laser flash illumination. Time constants were calculated from the photocurrent decay curves and at least three time components were well recognized (rise in 0.40 micros, declining in 0.40-0.45 micros and secondary increase in about 2 micros). The shape of the kinetics was discussed in terms of dye singlet and triplet state participation in photocurrent generation and also in terms of creation of the Helmholtz-Goy double layer at the dye layer-semiconductor interface. The alteration in shape of the Helmholtz-Goy double layer in photoelectrochemical cell after laser pulse was also discussed.
authors.affiliation: Institute of Physics, Faculty of Technical Physics, Poznan University of Technology, Nieszawska 13A, 60-965 Poznań, Poland.
authors.forename: Danuta
authors.initials: D
authors.lastname: Wróbel
authors.forename: Andrzej
authors.initials: A
authors.lastname: Boguta
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Wójcik
authors.forename: Rodica M
authors.initials: RM
authors.lastname: Ion
mesh_terms: D006046:Gold / Q000737:chemistry; D007211:Indoles / Q000737:chemistry*; D054833:Isoindoles; D007700:Kinetics; D010777:Photochemistry; D011838:Radiation-Sensitizing Agents / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013997:Time Factors
chemical_list: D007211:Indoles; D054833:Isoindoles; D011838:Radiation-Sensitizing Agents; D006046:Gold; C013647:phthalocyanine