Solution-processed small molecule-based blue light-emitting diodes using conjugated polyelectrolytes as electron injection layers

被引：27

作者：

Walker, Bright

Tamayo, Arnold

Yang, Jihua

Brzezinski, Jacek Z.

Nguyena, Thuc-Quyen ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 06期

关键词：

D O I：

10.1063/1.2968189

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Organic blue light-emitting diodes were studied using the solution processable small molecule 2,7-dipyrenyl-9,9'-dioctyl-fluorene (DPF) as the light-emitting material. The devices were fabricated in two simple structures: indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS)/DPF/LiF/Al and ITO/PEDOT:PSS/DPF/PFN-BIm(4)/Al, where PFN-BIm(4) is poly[9,9(')-bis[6 ''-(N,N,N-trimethylammonium)hexyl]fluorene-alt-co-phenylene] with tetrakis(imidazolyl)borate counterions. The LiF or PFN-BIm(4) act as electron injection layers. The ITO/PEDOT:PSS/DPF/PFN-BIm(4)/Al device, in which all organic layers are cast from solution, has a turn-on voltage of 3.8 V, a luminance of 2000 cd/m(2), and an efficiency of 0.6 cd/A. Using the PFN-BIm(4) layer shows a significant improvement of the device performance when compared to the LiF layer. (C) 2008 American Institute of Physics.

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共 23 条

[1] Humidity-induced crystallization of tris (8-hydroxyquinoline) aluminum layers in organic light-emitting devices [J].

Aziz, H ;

Popovic, Z ;

Xie, S ;

Hor, AM ;

Hu, NX ;

Tripp, C ;

Xu, G .

APPLIED PHYSICS LETTERS, 1998, 72 (07) :756-758

[2] Dramatic photoluminescence quenching of phenylene vinylene oligomer thin films upon submonolayer Ca deposition [J].

Choong, V ;

Park, Y ;

Gao, Y ;

Wehrmeister, T ;

Mullen, K ;

Hsieh, BR ;

Tang, CW .

APPLIED PHYSICS LETTERS, 1996, 69 (10) :1492-1494

[3] Luminescence of fluorenes 2,7-conjugatively extended with pyrenylvinylene and pyrenylvinylene-phenylenevinylene [J].

Cirpan, Ali ;

Rathnayake, Hemali P. ;

Lahti, Paul M. ;

Karasz, Frank E. .

JOURNAL OF MATERIALS CHEMISTRY, 2007, 17 (29) :3030-3036

[4] Study of interfacial degradation and morphological change of the vapor-deposited bilayer of Alq3/TPD for organic electroluminescent devices by AFM and PL technique [J].

Han, EM ;

Do, LM ;

Yamamoto, N ;

Fujihira, M .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1995, 267 :411-416

[5] Ion motion in conjugated polyelectrolyte electron transporting layers [J].

Hoven, Corey ;

Yang, Renqiang ;

Garcia, Andres ;

Heeger, Alan J. ;

Nguyen, Thuc-Quyen ;

Bazan, Guillermo C. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (36) :10976-+

[6] 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

[7] Recent progress of molecular organic electroluminescent materials and devices [J].

Hung, LS ;

Chen, CH .

MATERIALS SCIENCE & ENGINEERING R-REPORTS, 2002, 39 (5-6) :143-222

[8] Bright pure blue emission from multilayer organic electroluminescent device with purified unidentate organometallic complex [J].

Im, WB ;

Hwang, HK ;

Lee, JG ;

Han, K ;

Kim, Y .

APPLIED PHYSICS LETTERS, 2001, 79 (09) :1387-1389

[9] Small molecule based and solution processed highly efficient red electrophosphorescent organic light emitting devices [J].

Kim, Heekyung ;

Byun, Younghun ;

Das, Rupasree Ragini ;

Choi, Byoung-Ki ;

Ahn, Pil-Soo .

APPLIED PHYSICS LETTERS, 2007, 91 (09)

[10] Silylethynylated anthracene derivatives for use in organic light-emitting diodes [J].

Landis, CA ;

Parkin, SR ;

Anthony, JE .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 2005, 44 (6A) :3921-3922