Homogeneous alignment of poly(9,9-dioctylfluorene) films on thin layers of rubbed precursor-route poly(p-phenylenevinylene) allows the construction of light-emitting diodes that emit highly polarized blue light em=458 nm). The rubbed poly(p-phenylenevinylene) acts as an effective hole-injecting alignment layer. Annealing of poly(9,9-dioctylfluorene) in its nematic phase followed by rapid quenching orients the polymer as a glassy monodomain on the alignment layer and gives devices with a polarization ratio of 25:1 and a luminance of up to 250 cd/m2.

1.
J. H.
Burroughes
,
D. D. C.
Bradley
,
A. R.
Brown
,
R. N.
Marks
,
K.
Mackay
,
R. H.
Friend
,
P. L.
Burn
, and
A. B.
Holmes
,
Nature (London)
347
,
539
(
1990
).
2.
M. Inbasekaran, E. P. Woo, W. Wu, M. Bernius, and L. Wujkowski, Proceedings ICEL’2, Synth. Met. (to be published).
3.
M.
Grell
,
D. D. C.
Bradley
,
E. P.
Woo
, and
M.
Inbasekaran
,
Adv. Mater.
9
,
798
(
1997
).
4.
M.
Grell
,
W.
Knoll
,
D.
Lupo
,
A.
Meisel
,
T.
Miteva
,
D.
Neher
,
H. G.
Nothofer
,
U.
Scherf
, and
A.
Yasuda
,
Adv. Mater.
11
,
671
(
1999
).
5.
M.
Grell
,
M.
Redecker
,
K. S.
Whitehead
,
D. D. C.
Bradley
,
M.
Inbasekaran
,
E. P.
Woo
, and
W. W.
Wu
,
Liq. Cryst.
26
,
1403
(
1999
).
6.
M.
Jandke
,
P.
Strohriegl
,
J.
Gmeiner
,
W.
Brütting
, and
M.
Schwoerer
,
Adv. Mater.
11
,
1518
(
1999
).
7.
K. S. Whitehead, M. Grell, D. D. C. Bradley, M. Inbasekaran, and E. P. Woo, Proceedings ICEL’2, P.A. Lane Ed, Synth. Met. (to be published).
8.
D. Broer (private communication).
9.
M.
Grell
and
D. D. C.
Bradley
,
Adv. Mater.
11
,
895
(
1999
).
10.
D. D. C.
Bradley
,
R. H.
Friend
,
H.
Lindenberger
, and
S.
Roth
,
Polymer
27
,
1709
(
1986
).
11.
S. W.
Kang
,
S. E.
Chung
,
S. H.
Jin
,
J. S.
Lee
, and
J. C.
Lee
,
Synth. Met.
71
,
2213
(
1995
).
12.
N.
Miyaura
and
A.
Suzuki
,
Chem. Rev.
95
,
2457
(
1995
).
13.
M.
Grell
,
D. D. C.
Bradley
,
X.
Long
,
T.
Chamberlain
,
M.
Inbasekaran
, and
E. P.
Woo
,
Acta Polym.
49
,
439
(
1998
).
14.
A. W.
Grice
,
D. D. C.
Bradley
,
M. T.
Bernius
,
M.
Inbasekaran
, and
E. P.
Woo
,
Appl. Phys. Lett.
73
,
629
(
1998
).
15.
B.
Schartel
,
V.
Wachtendorf
,
M.
Grell
,
D. D. C.
Bradley
, and
M.
Hennecke
,
Phys. Rev. B
60
,
277
(
1999
).
16.
M.
Redecker
,
D. D. C.
Bradley
,
M.
Inbasekaran
, and
E. P.
Woo
,
Appl. Phys. Lett.
74
,
1400
(
1999
).
17.
K.
Pichler
,
R. H.
Friend
,
P. L.
Burn
, and
A. B.
Holmes
,
Synth. Met.
55–57
,
454
(
1993
).
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