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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 | Source: | 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. | Keywords: | charge exchange; conducting polymers; Fourier transform spectra; organic-inorganic hybrid materials; photoconductivity; photovoltaic cells; solar cells; titanium compounds | Document URI: | http://hdl.handle.net/1942/9087 | ISSN: | 0003-6951 | e-ISSN: | 1077-3118 | DOI: | 10.1063/1.3041633 | ISI #: | 000261430600073 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2009 |
Appears in Collections: | Research publications |
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