Substituent position-induced color tunability in polymer light-emitting diodes

被引：7

作者：

Kim, JY

Park, SH

Lee, K ^{[1
]}

Yum, IS

Jin, SH

机构：

[1] Pusan Natl Univ, Dept Phys, Pusan 609735, South Korea

[2] Pusan Natl Univ, Dept Chem, Pusan 609735, South Korea

来源：

APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 09期

关键词：

D O I：

10.1063/1.1502911

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report substituent position-induced color tunability in polymer light-emitting diodes fabricated with poly[2-{2- or 3- or 4-[(3,7-dimethyloctyl)oxy] phenyoxy}-1,4-phenylenevinylene] (DMOPPPV). When the position of the substituent in DMOP-PPV moves to the ortho, meta, and para sites, the corresponding photo- and electroluminescence spectra shift their peaks to a longer wavelength of about 540, 560, and 585 nm, respectively. We ascribe this to the different degree of steric effect in the backbone for each substituent position. As the substituent position is closer to the main chain, the planarity of the backbone is less conserved, thereby reducing the effective conjugated length of the main chain and broadening the pi-pi(*) energy gap. (C) 2002 American Institute of Physics.

引用

页码：1732 / 1734

页数：3

共 15 条

[1] Blue electroluminescent polymers:: Control of conjugation length by kink linkages and substituents in the poly(p-phenylenevinylene)-related copolymers [J].