Simulating excited-state absorption spectra in upconverting lanthanide doped nanoparticles: KY<inf>3</inf>F<inf>10</inf>:Er<sup>3+</sup>
Type of content
UC permalink
Publisher's DOI/URI
Thesis discipline
Degree name
Publisher
Journal Title
Journal ISSN
Volume Title
Language
Date
Authors
Abstract
High-resolution absorption and laser-excited fluorescence studies of KY3F10:Er3+ core-only nanoparticles are presented. A total of 49 crystal-field energy levels, distributed amongst 13 multiplets of the Er3+ ion, have been deduced for the C4v point group symmetry centre in this material. A parametrized, single-electron crystal-field calculation provides an excellent approximation to the experimental data with optimized crystal fit parameters that are comparable to the bulk KY3F10:Er3+ crystal. Simulated spectra, based upon wavefunctions derived from the crystal-field calculations, unequivocally demonstrate that excited-state absorption is the predominant upconversion mechanism in this material – agreeing well with upconversion excitation spectra obtained for Yb3+ co-doped samples.
Description
Citation
Keywords
Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
0306 Physical Chemistry (incl. Structural)
Fields of Research::34 - Chemical sciences::3403 - Macromolecular and materials chemistry::340303 - Nanochemistry
Fields of Research::34 - Chemical sciences::3403 - Macromolecular and materials chemistry::340304 - Optical properties of materials
Fields of Research::34 - Chemical sciences::3406 - Physical chemistry::340606 - Photochemistry