Tuning the emission colour by manipulating terbium-terbium interactions: Terbium doped aluminum nitride as an example system

Journal article


Publication Details

Author(s): Benz F, Strunk HP, Schaab J, Künecke U, Wellmann P
Journal: Journal of Applied Physics
Publisher: American Institute of Physics (AIP)
Publication year: 2013
Volume: 114
Journal issue: 7
ISSN: 0021-8979
Language: English


Abstract


Terbium-terbium interactions in terbium doped semiconductors and insulators may lead to the so-called cross-relaxation process, which increases the D-5(4) (green) emission of the terbium ions at the cost of the D-5(3) (blue) luminescence intensity. This effect can generally be reduced by increasing the distance between an excited ion and the nearest ion in the ground state. A straightforward measure is to use a specimen with a decreased terbium concentration. The alternative is to increase the intensity of the excitation (either by photons or electrons) and thereby to reduce the population of terbium ions in the ground state. This paper works this process out with the example of AlN:Tb on the basis of a model and respective experimental results. As will be seen, stronger excitation causes in essence more Tb ions to be excited, thus less ions in the ground state which increases the distance between an excited and the nearest ground state ions. This hinders energy transfer between the terbium ions and thus counteracts the cross-relaxation process. The advantage of changing the excitation intensity lies in the possibility to deliberately shift the apparent colour of the Tb luminescence from a single specimen between green and blue. (C) 2013 AIP Publishing LLC.


FAU Authors / FAU Editors

Künecke, Ulrike Dr.-Ing.
Professur für Werkstoffwissenschaften (Werkstoffe der Elektrotechnik)
Wellmann, Peter Prof. Dr.-Ing.
Professur für Werkstoffwissenschaften (Werkstoffe der Elektrotechnik)


External institutions
Universität Stuttgart


How to cite

APA:
Benz, F., Strunk, H.P., Schaab, J., Künecke, U., & Wellmann, P. (2013). Tuning the emission colour by manipulating terbium-terbium interactions: Terbium doped aluminum nitride as an example system. Journal of Applied Physics, 114(7). https://dx.doi.org/10.1063/1.4818815

MLA:
Benz, Felix, et al. "Tuning the emission colour by manipulating terbium-terbium interactions: Terbium doped aluminum nitride as an example system." Journal of Applied Physics 114.7 (2013).

BibTeX: 

Last updated on 2018-11-08 at 00:12