Characterisation of thin films of the organic infra-red emitters Yb- and Er-tris(8-hydroxyquinoline) by X-ray photoemission spectroscopy

被引：20

作者：

Blyth, RIR

Thompson, J

Zou, Y

Fink, R

Umbach, E

Gigli, G

Cingolani, R

机构：

[1] Univ Lecce, Natl Nanotechnol Lab, INFM, Dipartimento Ingn Innovaz, I-73100 Lecce, Italy

[2] Univ Wurzburg, D-97074 Wurzburg, Germany

来源：

SYNTHETIC METALS | 2003年 / 139卷 / 02期

关键词：

mass spectroscopy; photoemission; rare earth compounds; infra-red emitters;

D O I：

10.1016/S0379-6779(03)00106-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thin films of the rare earth tris(8-hydroxyquinolines) YbQ(3) and ErQ(3) were evaporated in ultra-high vacuum, and studied by X-ray photoelectron spectroscopy (XPS). Evaporation was monitored by mass spectroscopy of the major cracking products, which have masses >200 a.m.u. and show further splitting due to wide isotope distributions. C and N 1s XPS data are very similar to those of aluminium tris(8-hydroxyquinolines), implying very similar ligand behaviour, while the O 1s binding energy was significantly higher, indicating a more ionic metal-oxygen bond. YbQ(3) was found to be completely trivalent, with no indication of the mixed valence behaviour observed in other Yb compounds. (C) 2003 Elsevier Science B.V All rights reserved.

引用

页码：207 / 213

页数：7