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Molecular-scale investigation of C60/p-sexiphenyl organic heterojunction interface
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10.1063/1.3582789
/content/aip/journal/jcp/134/15/10.1063/1.3582789
http://aip.metastore.ingenta.com/content/aip/journal/jcp/134/15/10.1063/1.3582789
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Thickness dependent UPS spectra during the deposition of 6P on HOPG: (a) valence band spectra at the low-binding energy part and (b) corresponding close up spectra near the E F region, and (c) UPS spectra at the low-kinetic energy part (secondary electron cutoff). All binding energy are relative to the substrate Fermi level.

Image of FIG. 2.
FIG. 2.

(a) Close up UPS spectra near the E F region for 1 and 2 nm 6P on HOPG. (b) The proposed molecular packing structure for “edge-on + face-on” 6P layer on HOPG, where the blue ellipse highlights the “face-on” 6P and the red one for the “edge-on” 6P. (c) STM image of 6P monolayer on HOPG, 50 × 50 nm2, Vtip = 2.8 V; (d)–(f) the corresponding molecularly resolved 10 × 10 nm2 bias-dependent STM images: (d) Vtip = 2.8 V; (e) Vtip = 3.0 V; (f) Vtip = – 3.0 V.

Image of FIG. 3.
FIG. 3.

Thickness dependent UPS spectra during the deposition of C60 on 5 nm 6P covered HOPG: (a) valence band spectra at the low-binding energy part and (b) corresponding close up spectra near the E F region, and (c) UPS spectra at the low-kinetic energy part (secondary electron cutoff). All binding energy are relative to the substrate Fermi level. (d) Schematic energy diagram at the C60/6P/HOPG interfaces.

Image of FIG. 4.
FIG. 4.

(a) STM image of ∼0.8 monolayer C60 on “face-on + edge-on” 6P monolayer covered HOPG, 150 × 150 nm2, Vtip = – 1.9 V; (b) the corresponding line profile as highlighted by the solid line in panel (a). (c) 40 × 40 nm2 STM image in another region showing the boundary between the first layer C60 and the underlying 6P monolayer, Vtip = – 2.2 V. (d) 50 × 50 nm2 STM image in another region showing the boundary between the first layer C60 and the second layer C60, Vtip = – 2.4 V.

Image of FIG. 5.
FIG. 5.

(a) 30 × 30 nm2 STM image showing the first layer C60 on “face-on + edge-on” 6P monolayer covered HOPG, and (b) the corresponding 8 × 8 nm2 STM image, where the red ellipse highlights the missing C60 triplet. (c) and (d) Molecularly resolved STM images showing the C60 triplet formation on 6P monolayer on Ag(111) and (e) the corresponding schematic drawing of the proposed packing structure of C60 triplet on 6P molecule. Vtip = – 2.6 V for panels (a) and (b); Vtip = 1.4 V for panels (c) and (d).

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/content/aip/journal/jcp/134/15/10.1063/1.3582789
2011-04-21
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Molecular-scale investigation of C60/p-sexiphenyl organic heterojunction interface
http://aip.metastore.ingenta.com/content/aip/journal/jcp/134/15/10.1063/1.3582789
10.1063/1.3582789
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