TY - JOUR
T1 - Carbon nanotube-enhanced photoelectrochemical properties of metallo-octacarboxyphthalocyanines
AU - Mphahlele, Nonhlanhla E.
AU - Le Roux, Lukas
AU - Jafta, Charl J.
AU - Cele, Leskey
AU - Mathe, Mkhulu K.
AU - Nyokong, Tebello
AU - Kobayashi, Nagao
AU - Ozoemena, Kenneth I.
PY - 2014/1/1
Y1 - 2014/1/1
N2 - The photoelectrochemistry of metallo-octacarboxyphthalocyanines (MOCPc, where M = Zn or Si(OH)2) integrated with MWCNTs for the development of dye-sensitized solar cells (DSSCs) is reported. The DSSC performance (obtained from the photo-chronoamperometric and photo-impedimetric data) decreased as ZnOCPc > (OH)2SiOCPc. The incorporation of the MWCNTs on the surface of the TiO2 film (MOCPc-MWCNT systems) gave higher photocurrent density than the bare MOCPc complexes. Also, from the EIS results, the MOCPc-MWCNT hybrids gave faster charge transport kinetics (approximately three times faster) compared to the bare MOCPc complexes. The electron lifetime was slightly longer (ca. 6 ms) at the ZnOCPc systems than at the (OH) 2SiOCPc system (ca. 4 ms) meaning that the presence of the MWCNTs on the surface of the TiO2 film did not show any significant improvement on preventing charge recombination process.
AB - The photoelectrochemistry of metallo-octacarboxyphthalocyanines (MOCPc, where M = Zn or Si(OH)2) integrated with MWCNTs for the development of dye-sensitized solar cells (DSSCs) is reported. The DSSC performance (obtained from the photo-chronoamperometric and photo-impedimetric data) decreased as ZnOCPc > (OH)2SiOCPc. The incorporation of the MWCNTs on the surface of the TiO2 film (MOCPc-MWCNT systems) gave higher photocurrent density than the bare MOCPc complexes. Also, from the EIS results, the MOCPc-MWCNT hybrids gave faster charge transport kinetics (approximately three times faster) compared to the bare MOCPc complexes. The electron lifetime was slightly longer (ca. 6 ms) at the ZnOCPc systems than at the (OH) 2SiOCPc system (ca. 4 ms) meaning that the presence of the MWCNTs on the surface of the TiO2 film did not show any significant improvement on preventing charge recombination process.
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U2 - 10.1007/s10853-013-7710-1
DO - 10.1007/s10853-013-7710-1
M3 - Article
AN - SCOPUS:84891345994
VL - 49
SP - 340
EP - 346
JO - Journal of Materials Science
JF - Journal of Materials Science
SN - 0022-2461
IS - 1
ER -