Light-emitting electrochemical cells based on polyimide containing perylene and tri(ethylene oxide) moieties

被引：29
作者：
Ko, HC [1 ]
Lim, DK [1 ]
Kim, SH [1 ]
Choi, W [1 ]
Lee, H [1 ]
机构：
[1] Sogang Univ, Dept Chem, Seoul 121742, South Korea
来源：
SYNTHETIC METALS | 2004年 / 144卷 / 02期
基金：
新加坡国家研究基金会;
关键词：
light-emitting electrochemical cell; light-emitting diode; perylene; PEO; electroluminescence;
D O I：
10.1016/j.synthmet.2004.02.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to investigate the characteristics of the light-emitting electrochemical cells (LECs) based on perylene dye, we synthesized a polyimide [P(PDI-TEO)] containing perylene and tri(ethylene oxide) moieties. In solution and film states, P(PDI-TEO) exhibited electronic transitions similar to the other perylenetetracarboxylic dimides reported in the literatures. In the P(PDI-TEO)-based EL devices (LEC and LED), as the amount of lithium triflate (LiTf) increased in the emitting layer, the luminance reached a maximum value of ca. 1.6 cd/m(2) at 1/1 of PDI-TEO/LiTf molar ratio and then decreased. Addition of poly(ethylene oxide) to the P(PDI-TEO)/LiTf (1/1) layer resulted in increase of turn-on voltages in current-voltage-luminance curves due to higher IR-drop and in reduction of the maximum luminance due to the dilution effect. The LEC based on P(PDI-TEO)/LiTf (1/1) showed much more intensified electroluminescence spectrum (lambda(max): 643 nm) than the LED based on P(PDI-TEO) only. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：177 / 182
页数：6
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