Mesoscopic Donor-Acceptor Multilayer by Ultrahigh-Vacuum Codeposition of Zn-Tetraphenyl-Porphyrin and C70

被引：39

作者：

Vilmercati, Paolo ^{[1
,2
]}

Castellarin-Cudia, Carla ^{[1
]}

Gebauer, Ralph ^{[3
,4
]}

Ghosh, Prasenjit ^{[3
]}

Lizzit, Silvano ^{[1
]}

Petaccia, Luca ^{[1
]}

Cepek, Cinzia ^{[5
]}

Larciprete, Rosanna ^{[6
]}

Verdini, Alberto ^{[5
]}

Floreano, Luca ^{[5
]}

Morgante, Alberto ^{[2
,5
]}

Goldoni, Andrea ^{[1
,2
]}

机构：

[1] Sincrotrone Trieste SCpA, I-34012 Trieste, Italy

[2] Univ Trieste, Dipartimento Fis, I-34100 Trieste, Italy

[3] Int Ctr Theoret Phys, I-34014 Trieste, Italy

[4] Natl Simulat Ctr INFM Democritos, I-34012 Trieste, Italy

[5] Natl Lab TASC INFM CNR, I-34012 Trieste, Italy

[6] Inst Comp Syst, CNR, I-00133 Rome, Italy

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 02期

关键词：

FACE-TO-FACE; CHARGE-TRANSFER INTERACTIONS; MOLECULAR-ORIENTATION; SOLAR-CELLS; ELECTRONIC-STRUCTURE; PHOTOVOLTAIC CELLS; FULLERENES C-60; METAL-COMPLEXES; PHTHALOCYANINE; HETEROJUNCTION;

D O I：

10.1021/ja806914g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The peculiar electrochemical and photophysical properties of porphyrin and fullerene molecules make them promising candidates for the construction of two- and three-dimensional organic-based materials. An important question is how pristine fullerene and porphyrin will organize when deposited on surfaces via in vacuum molecular beam evaporation. Here we show that codeposition Of C-70 and Zn-tetraphenyl-porphyrin (ZnTPP) induces the self-assembly of electron-rich flat aromatic molecules at the curved surface Of C-70, thus enhancing the chromophore interaction and forming a supramolecular multilayer donor-acceptor structure. While the ground-state electronic spectra almost reflect a simple summation of ZnTPP and C-70 components, the excited-state electrons at the porphyrin macrocycle can rapidly delocalize to the fullerene. The excited charge transfer time scale is faster than 1-2 Is, as shown by resonant photoemission for the core-excited charges.

引用

页码：644 / 652

页数：9

共 35 条

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