Optical properties of pentacene thin films and single crystals

被引：102

作者：

Faltermeier, Daniel ^{[1
]}

Gompf, Bruno ^{[1
]}

Dressel, Martin ^{[1
]}

Tripathi, Ashutosh K. ^{[1
]}

Pflaum, Jens ^{[1
]}

机构：

[1] Univ Stuttgart, Inst Phys, D-70550 Stuttgart, Germany

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.74.125416

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The optical properties of pentacene single crystals and thin films are systematically investigated by variable angle spectroscopic ellipsometry. In combination with x-ray diffraction and atomic force microscopy the method allows us to distinguish between the complex optical constants (n and k) of the different polymorphs formed in thin films during the growth process. On the biaxial anisotropic single crystal it is possible to determine the optical constants along the respective crystallographic orientations. Temperature-dependent measurements in the range from T=5 K to 350 K confirm the assignment of the optical spectra. The results are in good agreement with ab initio calculations of the optical properties of solid pentacene by Tiago [Phys. Rev. B. 67, 115212 (2003)].

引用

页数：6

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