We present angle-resolved photoemission (PE) spectra of ordered multilayer sexithiophene (6T) films, 200nm thick, grown on a Au(110) single crystal. However, the measurement of sharp and nonshifted PE spectral features from the low-conducting organic material is only possible if the positive surface charge, generated in the PE process, is fully compensated. We have accomplished this by simultaneous laser irradiation. On the basis of the resulting data we found that for these thick films the 6T molecules are preferentially oriented with their long axes nearly normal to the surface.

1.
G.
Witte
and
C.
Woell
,
J. Mater. Res.
19
,
1889
(
2004
).
2.
G.
Horowitz
,
S.
Romdhane
,
H.
Bouchriha
,
P.
Delannoy
,
J. L.
Monge
,
F.
Kouki
, and
P.
Valat
,
Synth. Met.
90
,
187
(
1997
).
3.
H.
Fujimoto
,
U.
Nagashima
,
H.
Inokuchi
,
K.
Seki
,
Y.
Cao
,
H.
Nakahara
,
J.
Nakayama
,
M.
Hoshino
, and
K.
Fukuda
,
J. Chem. Phys.
92
,
4077
(
1990
).
4.
F.
Meinardi
,
M.
Cerminara
,
S.
Blumstengel
,
A.
Sassella
,
A.
Borghesi
, and
R.
Tubino
,
Phys. Rev. B
67
,
184205
(
2003
).
5.
S.
Prato
,
L.
Floreano
,
D.
Cvetko
,
V.
De Renzi
,
A.
Morgante
,
S.
Modesti
,
F.
Biscarini
,
R.
Zamboni
, and
C.
Taliani
,
J. Phys. Chem. B
103
,
7788
(
1999
).
6.
S.
Tavazzi
,
G.
Barbarella
,
A.
Borghesi
,
F.
Meinardi
,
A.
Sassella
, and
R.
Tubino
,
Synth. Met.
121
,
1419
(
2001
).
7.
N.
Koch
,
D.
Pop
,
R. L.
Weber
,
N.
Böwering
,
B.
Winter
,
M.
Wick
,
G.
Leising
,
I. V.
Hertel
, and
W.
Braun
,
Thin Solid Films
391
,
81
(
2001
).
8.
G.
Koller
,
F. P.
Netzer
, and
M. G.
Ramsey
,
Surf. Sci.
421
,
353
(
1999
).
9.
M.
Kiguchi
,
G.
Yoshikawa
, and
K.
Saiki
,
J. Appl. Phys.
94
,
4866
(
2003
).
10.
J.
Ivanco
,
J. R.
Krenn
,
M. G.
Ramsey
,
F. P.
Netzer
,
T.
Haber
,
R.
Resel
,
A.
Haase
,
B.
Stadlober
, and
G.
Jakopic
,
J. Appl. Phys.
96
,
2716
(
2004
).
11.
G.
Horowitz
,
B.
Bachet
,
A.
Yassar
,
P.
Lang
,
F.
Demanze
,
J. L.
Fave
, and
F.
Garnier
,
Chem. Mater.
7
,
1337
(
1995
).
12.
J. C.
Wittman
,
C.
Straupe
,
S.
Meyer
,
B.
Lotz
,
P.
Lang
,
G.
Horowitz
, and
F.
Garnier
,
Thin Solid Films
333
,
272
(
1998
).
You do not currently have access to this content.