Modulating phase-separation in blends of MEHPPV-x with different conjugation lengths

被引：4

作者：

Nagesh, K

Kabra, D

Narayan, KS

Ramakrishnan, S

机构：

[1] Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India

[2] Jawaharlal Nehru Ctr Adv Sci Res, Chem & Phys Mat Unit, Bangalore 560064, Karnataka, India

来源：

SYNTHETIC METALS | 2005年 / 155卷 / 02期

关键词：

segmented MEHPPV; MEHPPV-x blends; confocal microscopy; UV-vis; fluorescence of polymer blends; LIGHT-EMITTING-DIODES; POLYMER BLENDS; PRECURSORS;

D O I：

10.1016/j.synthmet.2005.01.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report here the phase-separation and energy transfer characteristics of segmented MEHPPV blends with two different distributions of conjugation lengths, namely MEHPPV-8 (LC, low conjugation length) and MEHPPV-100 (HC, high conjugation length). Thin films containing varying weight fractions of LC and HC were spin-cast from chloroform solutions. Photoluminescence studies of these thin films suggested that complete energy transfer from LC to HC occurred even though there was phase-separation. Selective chain-collapse of MEHPPV-100 by using a solution containing increasing volume fraction of cyclohexane for spin-coating allowed one to modulate the extent of energy transfer to some extent-typically the extent of energy transfer decreased in the presence of high volume fraction of cyclohexane. (C) 2005 Elsevier B.V. All rights reserved.

引用

收藏

页码：295 / 298

页数：4

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