We report on the fabrication and device properties of light-emitting resonant cavity conjugated-polymer diodes. The microcavity structures were constructed using a dielectric mirror, an indium–tin–oxide anode, a green light-emitting polyfluorene blend, and a metal (cathode) mirror. The best performance was obtained for a composite calcium–aluminum cathode, that combines high reflectivity with a low workfunction. This structure emitted electroluminescence with a linewidth of 12 nm and a maximum brightness of 300 cd m−2 at a bias of 35 V with an efficiency of 0.95 cd A−1.

1.
See e.g. the latest information on the CDT web-page: www.cdtltd.co.uk/.
2.
K.
Pichler
,
D. D. C.
Bradley
,
P. L.
Burn
,
R. H.
Friend
,
D. A.
Halliday
, and
A. B.
Holmes
,
J. Phys.: Condens. Matter
5
,
7155
(
1993
).
3.
J.
Cornil
,
D.
Beljonne
,
Z.
Shuai
,
T.
Hagler
,
D. D. C.
Bradley
,
I.
Campbell
,
J.-L.
Brédas
,
C. W.
Spangler
, and
K.
Müllen
,
Chem. Phys. Lett.
247
,
425
(
1995
).
4.
T.
Virgili
,
D. G.
Lidzey
, and
D. D. C.
Bradley
,
Adv. Mater.
12
,
58
(
2000
).
5.
M. A.
Baldo
,
D. F.
O’Brien
,
Y.
You
,
A.
Shoustikov
,
S.
Sibley
,
M. E.
Thompson
, and
S. R.
Forrest
,
Nature (London)
395
,
151
(
1998
).
6.
D. G.
Lidzey
,
D. D. C.
Bradley
,
S. J.
Martin
, and
M. A.
Pate
,
IEEE J. Sel. Top. Quantum Electron.
4
,
113
(
1998
).
7.
R. H.
Jordan
,
L. J.
Rothberg
,
A.
Dodabalapur
, and
R. E.
Slusher
,
Appl. Phys. Lett.
69
,
1997
(
1996
).
8.
T. A.
Fisher
,
D. G.
Lidzey
,
M. A.
Pate
,
M. S.
Weaver
,
D. M.
Whittaker
, and
D. D. C.
Bradley
,
Appl. Phys. Lett.
67
,
1355
(
1995
).
9.
M.
Berggren
,
O.
Inganas
,
T.
Granlund
,
S.
Guo
,
G.
Gustafsson
, and
M. R.
Andersson
,
Synth. Met.
76
,
121
(
1996
).
10.
V.
Cimrova
,
U.
Scherf
, and
D.
Neher
,
Appl. Phys. Lett.
69
,
608
(
1996
).
11.
J.
Grüner
,
F.
Cacialli
,
I. D. W.
Samuel
, and
R. H.
Friend
,
Synth. Met.
76
,
137
(
1995
).
12.
P. K. H.
Ho
,
S.
Thomas
,
R. H.
Friend
, and
N.
Tessler
,
Science
285
,
233
(
1999
).
13.
D. G.
Lidzey
,
M. A.
Pate
,
D. M.
Whittaker
,
D. D. C.
Bradley
,
M. S.
Weaver
,
T. A.
Fisher
, and
M. S.
Skolnick
,
Chem. Phys. Lett.
263
,
655
(
1996
).
14.
H.
Becker
,
R. H.
Friend
, and
T. D.
Wilkinson
,
Appl. Phys. Lett.
72
,
1266
(
1998
).
15.
S. E.
Burns
,
N.
Pfeffer
,
J.
Grüner
,
M.
Remmers
,
T.
Javoreck
,
D.
Neher
, and
R. H.
Friend
,
Adv. Mater.
9
,
395
(
1997
).
16.
H.
Becker
,
S. E.
Burns
,
N.
Tessler
, and
R. H.
Friend
,
J. Appl. Phys.
81
,
2825
(
1997
).
This content is only available via PDF.
You do not currently have access to this content.