Magneto-Optical Kerr Effect Spectroscopy-A Sensitive Tool for Investigating the Molecular Orientation in Organic Semiconductor Films

被引：19

作者：

Braeuer, Bjoern ^{[1
]}

Fronk, Michael ^{[2
]}

Lehmann, Daniel ^{[2
]}

Zahn, Dietrich R. T. ^{[2
]}

Salvan, Georgeta ^{[2
]}

机构：

[1] Stanford Univ, SIMES Ctr, SLAC Natl Accelerator Lab, Stanford, CA 94309 USA

[2] Tech Univ Chemnitz, Dept Phys, D-09107 Chemnitz, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2009年 / 113卷 / 45期

关键词：

DENSITY-FUNCTIONAL THEORY; THIN-FILMS; MULTILAYERS;

D O I：

10.1021/jp9073224

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The detection and control of the molecular growth mode is a key prerequisite for fabricating opto-electronic devices. In this work we present the magneto-optical Kerr effect (MOKE) spectroscopy to be a highly sensitive method for the detection of the molecular orientation. Oil the example of metal free phthalocyanine (H2PC) in thin films, it will be shown that also for diamagnetic molecules a strong magneto-optical response can be expected. The growth mode and thus the intensity of the MOKE signal of H2PC is strongly influenced by a templating effect using ultrathin layers of 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA). From the MOKE spectra in the energy range from 1.5 to 5.0 eV and the optical constants, the Voigt constant of thin organic films was determined. From the strong in-plane/out-of-plane anisotropy of the optical constants and the value of the Voigt constant the average molecular tilt angle of H2Pc molecules with respect to the substrate plane can be obtained.

引用

页码：14957 / 14961

页数：5

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