Stable efficiency roll-off in red phosphorescent organic light-emitting diodes using a spirofluorene-benzofluorene based carbazole type host material

被引：11

作者：

Jang, Sang Eok ^{[1
]}

Jeon, Soon Ok ^{[1
]}

Cho, Yong Joo ^{[1
]}

Yook, Kyoung Soo ^{[1
]}

Lee, Jun Yeob ^{[1
]}

机构：

[1] Dankook Univ, Dept Polymer Sci & Engn, Yongin 448701, Gyeonggi Do, South Korea

来源：

JOURNAL OF LUMINESCENCE | 2010年 / 130卷 / 11期

关键词：

Red phosphorescent organic light-emitting diode; Efficiency roll-off; Carbazole; Triplet host;

D O I：

10.1016/j.jlumin.2010.06.017

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Red phosphorescent organic light-emitting diodes (PHOLEDs) with stable efficiency roll-off were developed using a spirofluorene-benzofluorene based carbazole type host material. 9-(Spiro]benzo[c]-fluorene-7,9'-fluorene]-2'-yl)-9H-carbazole with a spiro[benzofluorene-7,9'-fluorene] and a carbazole unit was synthesized and it was used as the host material for the red PHOLED. The quantum efficiency of the red PHOLED was optimized at a doping concentration of 1% and the efficiency decrease at 10,000 cd/m(2) from the maximum efficiency was less than 10%. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：2184 / 2187

页数：4

共 11 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] Transient analysis of organic electrophosphorescence. II. Transient analysis of triplet-triplet annihilation [J].

Baldo, MA ;

Adachi, C ;

Forrest, SR .

PHYSICAL REVIEW B, 2000, 62 (16) :10967-10977

[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] Blue organic light-emitting diode with improved color purity using 5-naphthyl-spiro[fluorene-7,9′-benzofluorene] [J].

Jeon, Soon-Ok ;

Jeon, Young-Min ;

Kim, Joon-Woo ;

Lee, Chil-Won ;

Gong, Myoung-Seon .

ORGANIC ELECTRONICS, 2008, 9 (04) :522-532

[5] Stable efficiency roll-off in phosphorescent organic light-emitting diodes [J].

Kim, Sung Hyun ;

Jang, Jyongsik ;

Yook, Kyoung Soo ;

Lee, Jun Yeob .

APPLIED PHYSICS LETTERS, 2008, 92 (02)

[6] Suppression of exciton annihilation at high current densities in organic light-emitting diode resulting from energy-level alignments of carrier transport layers [J].

Matsushima, Toshinori ;

Adachia, Chihaya .

APPLIED PHYSICS LETTERS, 2008, 92 (06)

[7] Highly phosphorescent organic mixed films: The effect of aggregation on triplet-triplet annihilation [J].

Reineke, Sebastian ;

Schwartz, Gregor ;

Walzer, Karsten ;

Falke, Meiken ;

Leo, Karl .

APPLIED PHYSICS LETTERS, 2009, 94 (16)

[8] Reduced efficiency roll-off in high-efficiency hybrid white organic light-emitting diodes [J].

Schwartz, Gregor ;

Reineke, Sebastian ;

Walzer, Karsten ;

Leo, Karl .

APPLIED PHYSICS LETTERS, 2008, 92 (05)

[9]

YOOK KS, 2008, APPL PHYS LETT, V93

[10] Recombination zone study of phosphorescent organic light-emitting diodes with triplet mixed host emitting structure [J].

Yook, Kyoung Soo ;

Lee, Jun Yeob .

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, 2010, 16 (02) :181-184

← 1 2 →