Journal article

Publication year: 2010

Pages: 985-992

Journal: Journal of Porphyrins and Phthalocyanines

Volume number: 14

Issue number: 11

ISSN: 1088-4246

eISSN: 1099-1409

DOI Link: https://doi.org/10.1142/S1088424610002793

Publisher: World Scientific Publishing

Abstract: 
The photoelectroectrochemical studies of water soluble octacarboxylated oxotitanium (OTiOCPc), zinc (ZnOCPC), hydroxyaluminium ((OH)AlOCPc), dihydroxysilicon ((OH)(2)SiOCPc), hydroxygallium (OHGaOCPc) and low symmetry zinc monocarboxy (ZnMCPc) phthalocyanines were performed. The dyes were adsorbed to nanoporous ZnO electrodeposited in the presence of eosin Y as structure directing agent (SDA) on FTO substrates by refluxing or soaking the films in a solution containing the dye of interest such that a full surface coverage was achieved. High external (IPCE) and internal (APCE) quantum efficiencies of up to 50.6% and 96.7% were achieved for the OTiOCPc complex. There was a lower overall cell efficiency for cells sensitized with phthalocyanines containing hydroxyl as axial ligand ZnO/(OH)(2) SiOCPc, ZnO/(OH)GaOCPc and (OH) AlOCPc because of strong aggregation on the surface of the electrodes. To further suppress dye aggregation, the zinc complex of a new monocarboxylated phthalocyanine sensitizer with bulky naphtho side groups (ZnMCPc) was employed. Among the studied sensitizers, ZnMCPc gave the highest overall cell efficiency of phthalocyanine electrodeposited on ZnO of eta=0.48%.

Harvard Citation style: Masilela, N., Nombona, N., Loewenstein, T., Nyokong, T. and Schlettwein, D. (2010) Symmetrically and unsymmetrically substituted carboxy phthalocyanines as sensitizers for nanoporous ZnO films, Journal of Porphyrins and Phthalocyanines, 14(11), pp. 985-992. https://doi.org/10.1142/S1088424610002793

APA Citation style: Masilela, N., Nombona, N., Loewenstein, T., Nyokong, T., & Schlettwein, D. (2010). Symmetrically and unsymmetrically substituted carboxy phthalocyanines as sensitizers for nanoporous ZnO films. Journal of Porphyrins and Phthalocyanines. 14(11), 985-992. https://doi.org/10.1142/S1088424610002793