Tuning structural and optical properties of blue-emitting polymeric semiconductors

被引：15

作者：

Guha, Suchi ^{[1
]}

Chandrasekhar, Meera ^{[1
]}

Scherf, Ulli ^{[2
]}

Knaapila, Matti ^{[3
]}

机构：

[1] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

[2] Berg Univ Wuppertal, D-42097 Wuppertal, Germany

[3] Inst Energy Technol, Dept Phys, N-2027 Kjeller, Norway

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2011年 / 248卷 / 05期

基金：

美国国家科学基金会;

关键词：

conjugated polymers; high pressure; photoluminescence; Raman scattering; POLY(P-PHENYLENE VINYLENE); INTERMOLECULAR INTERACTIONS; SUBSTITUTED POLYFLUORENE; CONFORMATION; PRESSURE;

D O I：

10.1002/pssb.201000779

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present a comparison of the optical properties of blue-emitting polymers with varying backbone conformation under pressure. Among them alkyl substituted side chain polyfluorenes (PF) have a rich phase morphology. The effect of pressure on the backbone emission allows an understanding of the localized and delocalized electronic states and energy transfer mechanisms. The photoluminescence spectra are characterized by well-defined vibronic peaks, which red-shift and broaden with increasing pressure. Effects on both interchain and intrachain ordering in these polymer chains can be deduced from such optical studies under pressure. The Raman spectra under pressure provide insight into structural changes as well as electron-phonon interactions in PFs. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：1083 / 1090

页数：8

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