Improvement of quantum efficiency in polymer light-emitting diodes by a single-ion conductor

被引：27

作者：

Lee, TW ^{[1
]}

Park, OO ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Chem Engn, Ctr Adv Funct Polymers, Taejon 305701, South Korea

来源：

APPLIED PHYSICS LETTERS | 2000年 / 76卷 / 22期

关键词：

D O I：

10.1063/1.126616

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Polymer light-emitting diodes were fabricated using poly[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene] as an emissive material. Sodium ionic polyurethane (NaPU), a single-ion conductor (SIC), was employed as an electron-injecting material and compared with the case of sodium sulfonated polystyrene (SSPS). The quantum efficiency was greatly enhanced, compared with the SSPS-based device. The electron injection in the NaPU-based device is more favorable, compared with the SSPS-based device because of a larger ionic space charge accumulation near the cathode by the good chain segmental motion of the soft block in the polymer chains of the SIC. Thus, a balanced injection of an electron-hole pair can be achieved to greatly improve the quantum efficiency. (C) 2000 American Institute of Physics. [S0003-6951(00)01522-9].

引用

页码：3161 / 3163

页数：3

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