Light-emitting devices based on a poly(p-phenylenevinylene) statistical copolymer with oligo(ethylene oxide) side groups

被引:53
作者
Morgado, J
Cacialli, F
Friend, RH
Chuah, BS
Rost, H
Holmes, AB
机构
[1] Inst Super Tecn, Dept Engn Quim, P-1049001 Lisbon, Portugal
[2] Univ Cambridge, Dept Chem, Melville Lab Polymer Synthesis, Cambridge CB2 3RA, England
关键词
D O I
10.1021/ma001997t
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
We present the photo- and electroluminescence properties of the statistical copolymer, poly[2,5-bis(dimethyloctylsiyl)-1,4-phenylenevinylene)]-co-[2,5-bis(triethoxymethoxy)-1,4-phenylenevinylene)], BDMOS-co-BTEM-PPV, designed to combine the high efficiency of BDMOS-PPV, with the ion-coordinating ability of BTEM-PPV. We find that the photoluminescence efficiency is increased to about 17%, from 8.8% for BTEM-PPV. Single-layer light-emitting diodes with calcium (aluminum) cathodes exhibit luminances up to 1300 (10) cd/m(2) with an efficiency of approximate to0.5 (0.01) cd/A. ITO/BDMOS-co-BTEM-PPV:LiTf (8 wt %)/Al. devices display behavior typical of light-emitting electrochemical cells, LECs, with efficiencies up to 0.03 cd/A. These results show that this statistical copolymer approach is successful at improving the photoluminescence efficiency, while also granting sufficient ion coordination for LEC applications.
引用
收藏
页码:3094 / 3099
页数:6
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