Determination of the complex refractive index of powder phosphors

Journal article


Publication Details

Author(s): Solodovnyk A, Riedel D, Lipovšek B, Osvet A, Gast J, Stern E, Forberich K, Batentschuk M, Krč J, Topič M, Brabec C
Journal: Optical Materials Express
Publication year: 2017
Volume: 7
Journal issue: 8
ISSN: 2159-3930
Language: English


Abstract


We demonstrate a novel 2-step method to precisely determine both n and k of phosphors, luminescent inorganic particles, in the visible spectrum. To measure n we modified the Becke Line immersion method and verified its applicability in the absorption/ emission regions of phosphor particles (step 1). Particles were then embedded into a transparent binder and coated in thick layers (100-500 μm) on glass. Absorptance of the layers was measured with a novel approach: spectral angular resolved measurements. This method delivers accurate results by avoiding any errors from intense scattering inside the layers. A computational model was employed to extract k of particles from the measured absorptance data taking into account luminescence, scattering and re-absorption (step 2). The entire method was verified on reference materials. Finally, based on the proposed method, we determined in a broad wavelength range the n and k parameters for a variety of commonly used phosphors with few or no earlier reports on their n and k values (the complete set of numerical data is fully disclosed in the supplementary materials). © 2017 Optical Society of America.



FAU Authors / FAU Editors

Batentschuk, Miroslaw PD Dr.-Ing.
Institute Materials for Electronics and Energy Technology (i-MEET)
Brabec, Christoph Prof. Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Forberich, Karen Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Osvet, Andres Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Riedel, Daniel
Institute Materials for Electronics and Energy Technology (i-MEET)


External institutions with authors

Bayerisches Zentrum für Angewandte Energieforschung e.V. (ZAE Bayern)
University of Ljubljana (UL) / Univerza v Ljubljani


Research Fields

Neue Materialien und Prozesse
Research focus area of a faculty: Technische Fakultät


How to cite

APA:
Solodovnyk, A., Riedel, D., Lipovšek, B., Osvet, A., Gast, J., Stern, E.,... Brabec, C. (2017). Determination of the complex refractive index of powder phosphors. Optical Materials Express, 7(8). https://dx.doi.org/10.1364/OME.7.002943

MLA:
Solodovnyk, Anastasiia, et al. "Determination of the complex refractive index of powder phosphors." Optical Materials Express 7.8 (2017).

BibTeX: 

Last updated on 2018-02-08 at 09:36