Self-assembly surface modified indium-tin oxide anodes for single-layer light-emitting diodes

被引:38
作者
Morgado, J
Barbagallo, N
Charas, A
Matos, M
Alcácer, L
Cacialli, F
机构
[1] Inst Super Tecn, Inst Telecomun, P-1049001 Lisbon, Portugal
[2] Inst Super Tecn, Dept Engn Quim, P-1049001 Lisbon, Portugal
[3] Inst Tecnol & Nucl, Dept Quim, P-2686953 Sacavem, Portugal
[4] Inst Super Engn Lisboa, Dept Engn Quim, P-1949001 Lisbon, Portugal
[5] UCL, Dept Phys & Astron, London WC1E 6BT, England
关键词
D O I
10.1088/0022-3727/36/5/304
中图分类号
O59 [应用物理学];
学科分类号
摘要
We study the effect of indium-tin oxide surface modification by self assembling of highly polar molecules on the performance of single-layer light-emitting diodes (LEDs) fabricated with polyfluorene blends and aluminium cathodes. We find that the efficiency and light-output of such LEDs is comparable to, and sometimes better than, the values obtained for LEDs incorporating a hole injection layer of poly(3,4-ethylene dioxythiophene) doped with polystyrene sulphonic acid. This effect is attributed to the dipole-induced work function modification of indium-tin oxide.
引用
收藏
页码:434 / 438
页数:5
相关论文
共 33 条
[1]   Organic electroluminescent devices: enhanced carrier injection using SAM derivatized ITO electrodes [J].
Appleyard, SFJ ;
Day, SR ;
Pickford, RD ;
Willis, MR .
JOURNAL OF MATERIALS CHEMISTRY, 2000, 10 (01) :169-173
[2]   Tandem injection of charge carriers across a metal-dielectric interface [J].
Arkhipov, VI ;
Bässler, H .
APPLIED PHYSICS LETTERS, 2000, 77 (17) :2758-2760
[3]  
Bernius MT, 2000, ADV MATER, V12, P1737, DOI 10.1002/1521-4095(200012)12:23<1737::AID-ADMA1737>3.0.CO
[4]  
2-N
[5]   Efficient electron injection in blue-emitting polymer light-emitting diodes with LiF/Ca/Al cathodes [J].
Brown, TM ;
Friend, RH ;
Millard, IS ;
Lacey, DJ ;
Burroughes, JH ;
Cacialli, F .
APPLIED PHYSICS LETTERS, 2001, 79 (02) :174-176
[6]   Energy level line-up in polymer light-emitting diodes via electroabsorption spectroscopy [J].
Brown, TM ;
Cacialli, F .
IEE PROCEEDINGS-OPTOELECTRONICS, 2001, 148 (01) :74-80
[7]   Built-in field electroabsorption spectroscopy of polymer light-emitting diodes incorporating a doped poly(3,4-ethylene dioxythiophene) hole injection layer [J].
Brown, TM ;
Kim, JS ;
Friend, RH ;
Cacialli, F ;
Daik, R ;
Feast, WJ .
APPLIED PHYSICS LETTERS, 1999, 75 (12) :1679-1681
[8]   Energy transfer dynamics in polyfluorene-based polymer blends [J].
Buckley, AR ;
Rahn, MD ;
Hill, J ;
Cabanillas-Gonzalez, J ;
Fox, AM ;
Bradley, DDC .
CHEMICAL PHYSICS LETTERS, 2001, 339 (5-6) :331-336
[9]   LIGHT-EMITTING-DIODES BASED ON CONJUGATED POLYMERS [J].
BURROUGHES, JH ;
BRADLEY, DDC ;
BROWN, AR ;
MARKS, RN ;
MACKAY, K ;
FRIEND, RH ;
BURN, PL ;
HOLMES, AB .
NATURE, 1990, 347 (6293) :539-541
[10]   Quantifying the efficiency of electrodes for positive carrier injection into poly(9,9-dioctylfluorene) and representative copolymers [J].
Campbell, AJ ;
Bradley, DDC ;
Antoniadis, H .
JOURNAL OF APPLIED PHYSICS, 2001, 89 (06) :3343-3351