Low voltage and very high efficiency deep-blue phosphorescent organic light-emitting devices

被引：50

作者：

Eom, Sang-Hyun ^{[1
]}

Zheng, Ying ^{[1
]}

Chopra, Neetu ^{[1
]}

Lee, Jaewon ^{[1
]}

So, Franky ^{[1
]}

Xue, Jiangeng ^{[1
]}

机构：

[1] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 13期

关键词：

D O I：

10.1063/1.2996274

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on very high efficiency deep-blue phosphorescent organic light-emitting devices (PHOLEDs) based on iridium (III) bis (4', 6'-difluorophenylpyridinato) tetrakis (1-pyrazolyl) borate (FIr6). Dual emissive layers consisting of an N, N'-dicarbazolyl-3,5-benzene layer doped with 4 wt % FIr6 and a p-bis(triphenylsilyly) benzene layer doped with 25 wt % FIr6 were employed to maximize exciton generation on FIr6 molecules. Combined with the p-i-n device structure, we achieved a low turn-on voltage of 3.2 V and very high power efficiencies of 25 +/- 2 lm/W at 100 cd/m(2) and 20 +/- 2 lm/W at 1000 cd/m(2) for such deep-blue PHOLEDs with peak emission at a wavelength of 458 nm. (C) 2008 American Institute of Physics.

引用

页数：3

共 16 条

[1] Nearly 100% internal phosphorescence efficiency in an organic light-emitting device [J].

Adachi, C ;

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (10) :5048-5051

[2] High-efficiency fluorescent organic light-emitting devices using a phosphorescent sensitizer [J].

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

NATURE, 2000, 403 (6771) :750-753

[3] Highly efficient phosphorescent emission from organic electroluminescent devices [J].

Baldo, MA ;

O'Brien, DF ;

You, Y ;

Shoustikov, A ;

Sibley, S ;

Thompson, ME ;

Forrest, SR .

NATURE, 1998, 395 (6698) :151-154

[4] Measuring the efficiency of organic light-emitting devices [J].

Forrest, SR ;

Bradley, DDC ;

Thompson, ME .

ADVANCED MATERIALS, 2003, 15 (13) :1043-1048

[5] High-efficiency and low-voltage p-i-n electrophosphorescent organic light-emitting diodes with double-emission layers [J].

He, GF ;

Pfeiffer, M ;

Leo, K ;

Hofmann, M ;

Birnstock, J ;

Pudzich, R ;

Salbeck, J .

APPLIED PHYSICS LETTERS, 2004, 85 (17) :3911-3913

[6] Blue organic electrophosphorescence using exothermic host-guest energy transfer [J].

Holmes, RJ ;

Forrest, SR ;

Tung, YJ ;

Kwong, RC ;

Brown, JJ ;

Garon, S ;

Thompson, ME .

APPLIED PHYSICS LETTERS, 2003, 82 (15) :2422-2424

[7] Efficient, deep-blue organic electrophosphorescence by guest charge trapping [J].

Holmes, RJ ;

D'Andrade, BW ;

Forrest, SR ;

Ren, X ;

Li, J ;

Thompson, ME .

APPLIED PHYSICS LETTERS, 2003, 83 (18) :3818-3820

[8] Highly efficient phosphorescence from organic light-emitting devices with an exciton-block layer [J].

Ikai, M ;

Tokito, S ;

Sakamoto, Y ;

Suzuki, T ;

Taga, Y .

APPLIED PHYSICS LETTERS, 2001, 79 (02) :156-158

[9] Mixing of excimer and exciplex emission: A new way to improve white light emitting organic electrophosphorescent diodes [J].

Kalinowski, Jan ;

Cocchi, Massimo ;

Virgili, Dalia ;

Fattori, Valeria ;

Williams, J. A. Gareth .

ADVANCED MATERIALS, 2007, 19 (22) :4000-+

[10] Synthetic control of excited-state properties in cyclometalated Ir(III) complexes using ancillary ligands [J].

Li, J ;

Djurovich, PI ;

Alleyne, BD ;

Yousufuddin, M ;

Ho, NN ;

Thomas, JC ;

Peters, JC ;

Bau, R ;

Thompson, ME .

INORGANIC CHEMISTRY, 2005, 44 (06) :1713-1727

← 1 2 →