Experimental study of the 4fn → 4fn and 4fn → 4fn-15d1 transitions of the lanthanide diiodides LnI2 (Ln=Nd, Sm, Eu, Dy, Tm, Yb)

E Rogers; P Dorenbos; J T M de Haas; E van der Kolk

doi:10.1088/0953-8984/24/27/275502

Experimental study of the 4fn → 4fn and 4fn → 4fn-15d1 transitions of the lanthanide diiodides LnI2 (Ln=Nd, Sm, Eu, Dy, Tm, Yb)

J Phys Condens Matter. 2012 Jul 11;24(27):275502. doi: 10.1088/0953-8984/24/27/275502. Epub 2012 Jun 20.

Authors

E Rogers¹, P Dorenbos, J T M de Haas, E van der Kolk

Affiliation

¹ Luminescent Material Research Group, Faculty of Applied Sciences, Delft University of Technology, Faculty of Applied Sciences Mekelweg 15, NL-2629 JB Delft, The Netherlands. e.g.rogers@tudelft.nl

PMID: 22713248
DOI: 10.1088/0953-8984/24/27/275502

Abstract

The diffuse reflectance and photoluminescence (PL) spectra of NdI(2), SmI(2), EuI(2), DyI(2), TmI(2) and YbI(2) were measured between 225 and 12 500 nm in order to determine their 4f(n) → 4f(n-1)5d(1) optical bandgaps. The results were compared with those obtained using an empirical model of the electronic structure of LnI(2). The results can be used to explain the lanthanide valency and crystalline structure changes of other lanthanide diiodides such as PrI(2).

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Crystallography, X-Ray
Iodides / chemistry*
Lanthanoid Series Elements / chemistry*
Luminescence
Models, Molecular
Molecular Structure
Spectroscopy, Fourier Transform Infrared

Substances

Iodides
Lanthanoid Series Elements