Theoretical maximum quantum efficiency in red phosphorescent organic light-emitting diodes at a low doping concentration using a spirobenzofluorene type triplet host material

被引：52

作者：

Jeon, Soon Ok ^{[1
]}

Yook, Kyoung Soo ^{[1
]}

Joo, Chul Woong ^{[1
]}

Lee, Jun Yeob ^{[1
]}

机构：

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

来源：

ORGANIC ELECTRONICS | 2010年 / 11卷 / 05期

关键词：

Red phosphorescent organic light-emitting diodes; High efficiency; Low doping concentration; Energy transfer; FORSTER ENERGY-TRANSFER; ELECTROPHOSPHORESCENCE; SYSTEM; GUEST;

D O I：

10.1016/j.orgel.2010.02.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Red phosphorescent organic light-emitting diodes (PHOLEDs) with a 100% internal quantum efficiency at a low doping concentration were fabricated using a spirobenzofluorene type phosphine oxide as the host material. A spirobenzofluorene type phosphine oxide compound, 2,7-bis(diphenylphosphoryl)spiro[fluorene-7,11'-benzofluorene] (SPPO21), was synthesized as the electron transport type host material for the red phosphorescent organic light-emitting diodes. The device performances of the SPPO21 based red PHOLEDs were optimized at a low doping concentration of 1-2% because of energy transfer, little concentration quenching and charge trapping. A high external quantum efficiency of 20% was achieved for the red PHOLEDs with the SPPO21 host. (C) 2010 Elsevier B. V. All rights reserved.

引用

页码：881 / 886

页数：6

共 21 条

[1] Phosphorescent materials for application to organic light emitting devices [J].

Baldo, MA ;

Thompson, ME ;

Forrest, SR .

PURE AND APPLIED CHEMISTRY, 1999, 71 (11) :2095-2106

[2] Ultraviolet electroluminescence and blue-green phosphorescence using an organic diphosphine oxide charge transporting layer [J].

Burrows, PE ;

Padmaperuma, AB ;

Sapochak, LS ;

Djurovich, P ;

Thompson, ME .

APPLIED PHYSICS LETTERS, 2006, 88 (18)

[3] Electrophosphorescence from a polymer guest-host system with an iridium complex as guest: Forster energy transfer and charge trapping [J].

Gong, X ;

Ostrowski, JC ;

Moses, D ;

Bazan, GC ;

Heeger, AJ .

ADVANCED FUNCTIONAL MATERIALS, 2003, 13 (06) :439-444

[4] EXCIMERS AND EXCIPLEXES OF CONJUGATED POLYMERS [J].

JENEKHE, SA ;

OSAHENI, JA .

SCIENCE, 1994, 265 (5173) :765-768

[5] High efficiency red phosphorescent organic light-emitting diodes using a spirobenzofluorene type phosphine oxide as a host material [J].

Jeon, Soon Ok ;

Yook, Kyoung Soo ;

Joo, Chul Woong ;

Son, Hyo Suk ;

Jang, Sang Eok ;

Lee, Jun Yeob .

ORGANIC ELECTRONICS, 2009, 10 (05) :998-1000

[6] 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

[7] Ideal host and guest system in phosphorescent OLEDs [J].

Jeon, Woo Sik ;

Park, Tae Jin ;

Kim, Sun Young ;

Pode, Ramchandra ;

Jang, Jin ;

Kwon, Jang Hyuk .

ORGANIC ELECTRONICS, 2009, 10 (02) :240-246

[8] Highly efficient and stable red phosphorescent organic light-emitting device using bis[2-(2-benzothiazoyl)phenolato]zinc(II) as host material [J].

Kanno, Hiroshi ;

Ishikawa, Kaori ;

Nishio, Yoshitaka ;

Endo, Ayataka ;

Adachi, Chihaya ;

Shibata, Kenichi .

APPLIED PHYSICS LETTERS, 2007, 90 (12)

[9] Energy transfer in polymer electrophosphorescent light emitting devices with single and multiple doped luminescent layers [J].

Kawamura, Y ;

Yanagida, S ;

Forrest, SR .

JOURNAL OF APPLIED PHYSICS, 2002, 92 (01) :87-93

[10] Intermolecular interaction and a concentration-quenching mechanism of phosphorescent Ir(III) complexes in a solid film [J].

Kawamura, Y ;

Brooks, J ;

Brown, JJ ;

Sasabe, H ;

Adachi, C .

PHYSICAL REVIEW LETTERS, 2006, 96 (01)

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