期刊
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
卷 48, 期 24, 页码 5727-5736出版社
WILEY-BLACKWELL
DOI: 10.1002/pola.24374
关键词
bipolar conjugated polymers; light emitting diodes (LED); poly(p-phenylene) (PPP); triazole (TAZ); triphenylamine (TPA)
资金
- National Science Council of the Republic of China [98 2221 E 006 002 MY3]
Two novel copoly(p-phenylene)s (P1-P2) containing bipolar groups (12 8 and 68 mol % respectively) directly linked hole transporting triphenylamine and electron transporting aromatic 1 2 4 triazole were synthesized to enhance electroluminescence (EL) of poly(p-phenylene vinylene) (PPV) derivatives The bipolar groups not only enhance thermal stability but also promote electron affinity and hole affinity of the resulting copoly(p phenylene)s Blending the bipolar copoly (p phenylene)s (P1-P2) with PPV derivatives (d6 PPV) as an emitting layer effectively improve the emission efficiency of its electroluminescent devices (indium tin oxide (ITO)/poly(3 4 ethyl enedioxythiophene) (PEDOT) poly(styrenesulfonate) (PSS)/poly mer blend/Ca (50 nm)/Al (100 nm)] The maximum luminance and maximum luminance efficiency were significantly enhanced from 310 cd m(-2) and 0 03 cd A(-1) (d6-PPV based device) to 1450 cd m(-2) and 0 20 cd A(-1) (blend device with d6 PPV/P1 = 96/4 con taming similar to 0 5 wt % of bipolar groups) respectively Our results demonstrate the efficacy of the copoly(p-phenylene)s with bipolar groups in enhancing EL of PPV derivatives (c) 2010 Wiley Periodicals Inc J Polym Sci Part A Polym Chem 48 5727-5736 2010
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