Lithium salt doped conjugated polymers as electron transporting materials for highly efficient blue polymer light-emitting diodes

被引：32

作者：

Huang, Fei ^{[1
]}

Shih, Ping-I ^{[1
,2
]}

Liu, Michelle S. ^{[1
]}

Shu, Ching-Fong ^{[2
]}

Jen, Alex K. -Y. ^{[1
]}

机构：

[1] Univ Washington, Inst Adv Mat & Technol, Dept Mat Sci & Engn, Seattle, WA 98195 USA

[2] Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu 300, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 24期

基金：

美国国家科学基金会;

关键词：

conducting polymers; current density; lithium compounds; organic light emitting diodes; phosphorescence;

D O I：

10.1063/1.3050452

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Highly efficient blue polymer light-emitting diodes (PLEDs) are fabricated using a conjugated polymer, poly[9,9-bis(2-(2-(2-diethanol-amino-ethoxy) ethoxy) ethyl) fluorene-alt-4, 4(')-phenylether] as an electron transporting layer (ETL). It was found that the performance of these blue-emitting devices could be greatly improved if the ETL was doped with LiF or Li2CO3 salts. A bis[(4,6-di-fluorophenyl)-pyridinato-N, C-2] (picolinate) Ir(III) (FIrpic) complex based blue phosphorescent PLED exhibited a maximum luminance efficiency of 20.3 cd/A with a luminance of 1600 cd/m(2) at the current density of 7.9 mA/cm(2) and drive voltage of 8.0 V.

引用

页数：3

共 17 条

[1] 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

[2] LiF as an n-dopant in tris(8-hydroxyquinoline) aluminum thin films [J].

Choudhury, Kaushik Roy ;

Yoon, Jong-hyuk ;

So, Franky .

ADVANCED MATERIALS, 2008, 20 (08) :1456-+

[3] Charge transport in organic semiconductors [J].

Coropceanu, Veaceslav ;

Cornil, Jerome ;

da Silva Filho, Demetrio A. ;

Olivier, Yoann ;

Silbey, Robert ;

Bredas, Jean-Luc .

CHEMICAL REVIEWS, 2007, 107 (04) :926-952

[4] Design of hole blocking layer with electron transport channels for high performance polymer light-emitting diode [J].

Hsiao, Chung-Chin ;

Hsiao, An-En ;

Chen, Show-An .

ADVANCED MATERIALS, 2008, 20 (10) :1982-+

[5] High-efficiency, environment-friendly electroluminescent polymers with stable high work function metal as a cathode: Green- and yellow-emitting conjugated polyfluorene polyelectrolytes and their neutral precursors [J].

Huang, F ;

Hou, LT ;

Wu, HB ;

Wang, XH ;

Shen, HL ;

Cao, W ;

Yang, W ;

Cao, Y .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (31) :9845-9853

[6] Novel electroluminescent conjugated polyelectrolytes based on polyfluorene [J].

Huang, F ;

Wu, HB ;

Wang, D ;

Yang, W ;

Cao, Y .

CHEMISTRY OF MATERIALS, 2004, 16 (04) :708-716

[7] A conjugated, neutral surfactant as electron-injection material for high-efficiency polymer light-emitting diodes [J].

Huang, Fei ;

Niu, Yu-Hua ;

Zhang, Yong ;

Ka, Jae-Won ;

Liu, Michelle S. ;

Jen, Alex K. -Y .

ADVANCED MATERIALS, 2007, 19 (15) :2010-+

[8] Efficient ultraviolet-blue polymer light-emitting diodes based on a fluorene-based non-conjugated polymer [J].

Huang, Fei ;

Niu, Yu-Hua ;

Liu, Michelle S. ;

Zhou, Xing-Hua ;

Tian, Yan-Qing ;

Jen, Alex K. -Y. .

APPLIED PHYSICS LETTERS, 2006, 89 (08)

[9] High-efficiency stacked white organic light-emitting diodes [J].

Lee, Tae-Woo ;

Noh, Taeyong ;

Choi, Byoung-Ki ;

Kim, Myeong-Suk ;

Shin, Dong Woo ;

Kido, Junji .

APPLIED PHYSICS LETTERS, 2008, 92 (04)

[10] Highly efficient solution processed blue organic electrophosphorescence with 14 lm/W luminous efficacy [J].

Mathai, MK ;

Choong, VE ;

Choulis, SA ;

Krummacher, B ;

So, F .

APPLIED PHYSICS LETTERS, 2006, 88 (24)

← 1 2 →