Two-photon photoelectron spectroscopy of conjugated polymer thin films on gold

被引：17

作者：

Sohn, Y

Richter, J

Ament, J

Stuckless, JT

机构：

[1] Univ British Columbia, Dept Chem, Vancouver, BC V6T 1Z1, Canada

[2] Univ British Columbia, AMPEL Labs, Vancouver, BC V6T 1Z1, Canada

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 01期

关键词：

D O I：

10.1063/1.1638897

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present results for two-photon photoelectron spectroscopy of thin regioregular poly-3-hexyl-thiophene films on a gold metal substrate. The photoemission quantum yields are orders of magnitude larger than that of bare gold at the same laser intensity. Furthermore, we observe a strong increase of the quantum yield with increasing film thickness accompanied by a decreasing yield slope with respect to laser power. Our findings can be understood by assuming the creation of a long-lived intermediate state excitation that couples to the metal surface. This view is further supported by the dependence of the electron kinetic energy spectra on the laser photon energy. (C) 2004 American Institute of Physics.

引用

页码：76 / 78

页数：3

共 21 条

[1] Optical spectroscopy of field-induced charge in self-organized high mobility poly(3-hexylthiophene) [J].