Ground-state charge-transfer complex formation in hybrid poly(3-hexyl thiophene):titanium dioxide solar cells

被引：30

作者：

Haeldermans, I. ^{[1
]}

Vandewal, K. ^{[1
]}

Oosterbaan, W. D. ^{[1
]}

Gadisa, A. ^{[1
,2
]}

D'Haen, J. ^{[1
]}

Van Bael, M. K. ^{[1
,2
]}

Manca, J. V. ^{[1
,2
]}

Mullens, J. ^{[1
]}

机构：

[1] Hasselt Univ, Inst Mat Res, B-3590 Diepenbeek, Belgium

[2] IMEC VZW, Div IMOMEC, B-3590 Diepenbeek, Belgium

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 22期

关键词：

charge exchange; conducting polymers; Fourier transform spectra; organic-inorganic hybrid materials; photoconductivity; photovoltaic cells; solar cells; titanium compounds;

D O I：

10.1063/1.3041633

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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.

引用

页数：3

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