Energy and Electron Transfer in Multilayer Films Containing Porphyrin-Fullerene Dyad

被引:22
作者
Kaunisto, Kimmo [1 ]
Chukharev, Vladimir [1 ]
Tkachenko, Nikolai V. [1 ]
Efimov, Alexander [1 ]
Lemmetyinen, Helge [1 ]
机构
[1] Tampere Univ Technol, Dept Chem & Bioengn, FI-33101 Tampere, Finland
关键词
PHOTOINDUCED CHARGE SEPARATION; MOLECULAR FILMS; PHOTOPHYSICS; DEPENDENCE; CELLS; STATE;
D O I
10.1021/jp807962j
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Photoinduced interlayer energy and electron transfer from a thiophene derivative, PVT3, to a porphyrin-fullerene dyad, P-F, was demonstrated. The laser flash photolysis method was utilized to characterize photoinduced processes in layered thin films constructed by the Langmuir-Blodgett and spin-coating techniques. Poly(3-hexylthiophene), PHT, was used as an electron-donating layer to the dyad and PVT3. Electron transfer through a multilayer film with a PHT-PVT3-P-F layer sequence was shown, yielding the final charge-separated state where the positive charges are located in the PHT network and the electrons in the fullerene sublayer. The crucial role of excited P-F for the overall charge transfer efficiency of a bilayer film containing a phthalocyanine derivative, ZnPH4, as an electron-donating moiety to P-F was demonstrated. The lifetime of the electrical signal of the charge separation was shown to be prolonged compared to that of the optical signal.
引用
收藏
页码:3819 / 3825
页数:7
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