Synthesis of Bipolar Charge Transporting Block Copolymers and Characterization for Organic Light-Emitting Diode

被引：18

作者：

Tsuchiya, Kousuke ^{[1
]}

Kasuga, Hidemasa ^{[1
]}

Kawakami, Akira ^{[2
]}

Taka, Hideo ^{[2
]}

Kita, Hiroshi ^{[2
]}

Ogino, Kenji ^{[1
]}

机构：

[1] Tokyo Univ Agr & Technol, Grad Sch Bioapplicat & Syst Engn, Koganei, Tokyo 1848588, Japan

[2] Konica Minolta Technol Ctr Inc, Display Technol R&D Labs, Hachioji, Tokyo 1928505, Japan

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2010年 / 48卷 / 07期

关键词：

block copolymers; light-emitting diodes; living radical polymerization; oxadiazole; triphenylamine; CYCLOMETALATED IRIDIUM COMPLEXES; EFFICIENT; POLYMERS; SURFACES; DEVICES; HOST;

D O I：

10.1002/pola.23853

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A series of hole and electron transporting random and block copolymers consisting of triphenylamine moiety as a hole transporting unit and oxadiazole moiety as an electron transporting unit have been prepared via a nitroxide mediated radical polymerization. Oxadiazole monomers with t-butyl or trifluoromethyl groups, 2 and 7, respectively, were used for copolymerization. Photoluminescent measurements of polymers revealed that the formation of the exciplex between triphenylamine and oxadiazole units tends to occur in the order of random copolymers, block copolymers, and polymer blends, implying phase-separated morphologies in block or blend systems. The polymers were applied for OLED devices, and we found that the morphology in the polymer layer critically affected device performance. The block copolymer comprising hole and electron transporting units with the composition of 14/86 showed the highest external quantum efficiency over 10%. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 1461-1468, 2010

引用

页码：1461 / 1468

页数：8

共 23 条

[11] Comparison of the fouling release properties of hydrophobic fluorinated and hydrophilic PEGylated block copolymer surfaces:: Attachment strength of the diatom Navicula and the green alga Ulva [J].

Krishnan, Sitaraman ;

Wang, Nick ;

Ober, Christopher K. ;

Finlay, John A. ;

Callow, Maureen E. ;

Callow, James A. ;

Hexemer, Alexander ;

Sohn, Karen E. ;

Kramer, Edward J. ;

Fischer, Daniel A. .

BIOMACROMOLECULES, 2006, 7 (05) :1449-1462

[12] Highly phosphorescent bis-cyclometalated iridium complexes: Synthesis, photophysical characterization, and use in organic light emitting diodes [J].

Lamansky, S ;

Djurovich, P ;

Murphy, D ;

Abdel-Razzaq, F ;

Lee, HE ;

Adachi, C ;

Burrows, PE ;

Forrest, SR ;

Thompson, ME .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (18) :4304-4312

[13] Polymer phosphorescent light-emitting devices doped with tris(2-phenylpyridine) iridium as a triplet emitter [J].

Lee, CL ;

Lee, KB ;

Kim, JJ .

APPLIED PHYSICS LETTERS, 2000, 77 (15) :2280-2282

[14] Bipolar copolymers as host for electroluminescent devices:: Effects of molecular structure on film morphology and device performance [J].

Ma, Biwu ;

Kim, Bumjoon J. ;

Deng, Lan ;

Poulsen, Daniel A. ;

Thompson, Mark E. ;

Frechet, Jean M. J. .

MACROMOLECULES, 2007, 40 (23) :8156-8161

[15] Enabling nanotechnology with self assembled block copolymer patterns [J].

Park, C ;

Yoon, J ;

Thomas, EL .

POLYMER, 2003, 44 (22) :6725-6760

[16]

Sato H, 1997, POLYM ADVAN TECHNOL, V8, P454, DOI 10.1002/(SICI)1099-1581(199707)8:7<454::AID-PAT672>3.3.CO

[17]

2-9

[18] Enhancement of phosphorescence of Ir complexes bound to conjugated polymers: Increasing the triplet level of the main chain [J].

Schulz, Gisela L. ;

Chen, Xiwen ;

Chen, Show-An ;

Holdcroft, Steven .

MACROMOLECULES, 2006, 39 (26) :9157-9165

[19] Highly efficient polymer light-emitting devices using ambipolar phosphorescent polymers [J].

Suzuki, M ;

Tokito, S ;

Sato, F ;

Igarashi, T ;

Kondo, K ;

Koyama, T ;

Yamaguchi, T .

APPLIED PHYSICS LETTERS, 2005, 86 (10) :1-3

[20] ORGANIC ELECTROLUMINESCENT DIODES [J].

TANG, CW ;

VANSLYKE, SA .

APPLIED PHYSICS LETTERS, 1987, 51 (12) :913-915

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