Bipolar poly(p-phenylene vinylene)s bearing electron-donating triphenylamine or carbazole and electron-accepting quinoxaline moieties

被引：43
|
作者：
Karastatiris, Panayiotis [2 ]
Mikroyannidis, John A. [2 ]
Spiliopoulos, Ioakim K. [1 ]
机构：
[1] Technol Educ Inst Kalamata, Kalamata 24100, Greece
[2] Univ Patras, Dept Chem, Chem Technol Lab, Patras 26500, Greece
来源：
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2008年 / 46卷 / 07期
关键词：
carbazole; conjugated polymers; donor-acceptor copolymers; light-emitting diodes (LED); organic light-emitting diodes; PPV; quinoxaline; synthesis; triphenylamine;
D O I：
10.1002/pola.22571
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Two new poly(phenylene vinylene)s (PPVs) carrying electron-donating tri-phenylamine or carbazole and electron-deficient quinoxaline units were synthesized and characterized. Their properties were compared with those of PPV containing only quinoxaline unit. The two polymers showed PL maximum at 501-510 in solution and 533-540 in thin film. Because of the presence of electron donor and acceptor units they displayed strong intramolecular charge transfer (ICT) effects; hence, low-photoluminescence quantum yields. The polymers showed reversible electrochemical reduction with electron affinity of 2.75 eV and irreversible oxidation with ionization potential of 5.10-5.24 eV. Single-layer LED of configuration ITO/PEDOT/polymer/Al showed low turn-on voltage at 5 V, but limited brightness of 50-60 cdm(-2). The electroluminescence maximum was voltage-tunable varying from 500 to 542 nm. (C) 2008 Wiley Periodicals, Inc.
引用
收藏
页码：2367 / 2378
页数：12
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