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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/9087

Title: Ground-state charge-transfer complex formation in hybrid poly(3-hexyl thiophene):titanium dioxide solar cells
Authors: HAELDERMANS, Ilse
VANDEWAL, Koen
OOSTERBAAN, Wibren
GADISA DINKU, Abay
D'HAEN, Jan
VAN BAEL, Marlies
MANCA, Jean
MULLENS, Jules
Issue Date: 2008
Publisher: AMER INST PHYSICS
Citation: APPLIED PHYSICS LETTERS, 93(22)
Abstract: The existence of a ground-state charge-transfer (CT) complex in a conjugated polymer:metal oxide nanoparticle bulk heterojunction photovoltaic cell is demonstrated by Fourier-transform photocurrent spectroscopy (FTPS). The CT complex between poly(3-hexylthiophene) (P3HT) and titanium dioxide (TiO2) is characterized by a weak additional photocurrent band (onset 1 eV) in the FTPS spectra, situated below the conjugated polymer bandgap of 2 eV. The presence of CT interaction between P3HT and TiO2 in relation to frontier orbital alignment is discussed, as well as the contribution of a sub-bandgap interfacial CT state to the electron transfer process in P3HT:TiO2 solar cells.
Notes: [Haeldermans, I.; Vandewal, K.; Oosterbaan, W. D.; Gadisa, A.; D'Haen, J.; Van Bael, M. K.; Manca, J. V.; Mullens, J.] Hasselt Univ, Inst Mat Res, B-3590 Diepenbeek, Belgium. [Gadisa, A.; Van Bael, M. K.; Manca, J. V.] IMEC VZW, Div IMOMEC, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/9087
DOI: 10.1063/1.3041633
ISI #: 000261430600073
ISSN: 0003-6951
Category: A1
Type: Journal Contribution
Validation: ecoom, 2009
Appears in Collections: Research publications

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