Emitting polymers containing cyano groups. Synthesis and photophysical properties of a fully conjugated polymer obtained by Wittig reaction

被引:40
作者
Pinto, MR
Hu, B
Karasz, FE [1 ]
Akcelrud, L
机构
[1] Univ Massachusetts, Conte Ctr Polymer Res, Dept Polymer Sci & Engn, Amherst, MA 01003 USA
[2] Univ Fed Parana, Ctr Politecn, Dept Quim, BR-81531900 Curitiba, Parana, Brazil
关键词
electroluminescent polymers; cyano polymers; photoluminescent polymers;
D O I
10.1016/S0032-3861(00)00162-2
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 new electroluminescent fully conjugated, substituted PPV-related structure was synthesized. The ring-substituted units (2,5 hexadecyloxy and 2,5 cyano) were interspersed by one non-substituted PPV unit. The EL emission was centered at 612 nm (orange). Double layer devices using PPV as a hole-transporting material showed 3000 cd/m(2) at a 20 V bias. In addition to the better transport characteristics imparted by the PPV layer, Forster transfer at the interface provided a better light output in these devices in comparison with single layer LEDs. Increases in PPV thickness yielded a slight blue shift suggesting that emission from the bulk PPV was occurring as well. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:8095 / 8102
页数:8
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