Photoelectric characteristics of lead phthalocyanine/titanium oxide structures

A study has been carried out into the conduction, charge transfer/electron injection and photovoltaic conversion properties of TiO2-lead phthalocyanine (PbPc) heterojunctions. The results indicate that although the heterojunction area, and hence overall conversion efficiency, was low for the planar...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2003-06, Vol.36 (12), p.1409-1413
Main Authors: Ray, A K, Tracey, S M, Hodgson, S N B
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Exact sciences and technology
Natural energy
Photovoltaic conversion
Solar cells. Photoelectrochemical cells
Solar energy
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Summary:A study has been carried out into the conduction, charge transfer/electron injection and photovoltaic conversion properties of TiO2-lead phthalocyanine (PbPc) heterojunctions. The results indicate that although the heterojunction area, and hence overall conversion efficiency, was low for the planar device structures used in the investigation, electron injection and effective charge separation across the dye-TiO2 interface was achieved, with open circuit voltages in the region of 0.3 V. The conversion efficiency was found to be a function of the thickness of the phthalocyanine layer, increasing by a factor of more than 30 times as the thickness of the dye layer was reduced from 500 to 100 nm. The results suggest that under appropriate deposition conditions, to ensure effective coating of the inorganic phase, such phthalocyanine dyes may offer potential for use in dye sensitized photovoltaic cells.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/36/12/308