Emission enhancement via local symmetry distortion in lanthanide-based upconverting nanoparticles

Lanthanide-based upconverters exhibit great potential for photovoltaic and bioimaging applications but have been traditionally plagued by prohibitively low quantum efficiencies. One reason largely responsible is the parity-forbidden nature of the electronic transitions which comprise upconversion. I...

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Bibliographic Details
Published in2016 Conference on Lasers and Electro-Optics (CLEO) pp. 1 - 2
Main Authors Wisser, Michael D., Fischer, Stefan, Alivisatos, A. Paul, Salleo, Alberto, Dionne, Jennifer A.
Format Conference Proceeding
LanguageEnglish
Published OSA 01.06.2016
Subjects
Distortion
Ions
Nanoparticles
Optical distortion
Stimulated emission
X-ray scattering
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Summary:Lanthanide-based upconverters exhibit great potential for photovoltaic and bioimaging applications but have been traditionally plagued by prohibitively low quantum efficiencies. One reason largely responsible is the parity-forbidden nature of the electronic transitions which comprise upconversion. Ionic cosubstitution is used as a means to influence and distort the local symmetry environments of emitting ions without disturbing the global structure of the host lattice. Upconversion emission intensity is shown to increase more than 2× with a modest degree of cosubstitution. This enhancement is obtained without any changes to particle size or global structure.
DOI:10.1364/cleo_si.2016.sth4q.8