Anisotropy of transient photoconductivity in functionalized pentacene single crystals

被引：74

作者：

Ostroverkhova, O.

Cooke, D. G.

Hegmann, F. A.

Tykwinski, R. R.

Parkin, S. R.

Anthony, J. E.

机构：

[1] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada

[2] Univ Alberta, Dept Chem, Edmonton, AB T6G 2J1, Canada

[3] Univ Kentucky, Dept Chem, Lexington, KY 40506 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 19期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1063/1.2387135

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the anisotropy of transient photoconductivity in functionalized pentacene single crystals using ultrafast optical pump-terahertz probe techniques. Functionalized pentacene crystals with tri-isopropylsilylethynyl (TIPS) and tri-ethylsilylethynyl (TES) side groups were studied, characterized by crystal structures favoring two-dimensional and one-dimensional charge transports, respectively. Charge carrier mobility anisotropies in the a-b plane of 3.5 +/- 0.6 and 12 +/- 6 were obtained in the TIPS and TES crystals, respectively, consistent with the degree of pi overlap along different directions in the crystals. A photogeneration efficiency anisotropy was also observed in both types of crystals.

引用

页数：3

共 22 条

[1] A road map to stable, soluble, easily crystallized pentacene derivatives [J].