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Title: Nonlinear spectral and lifetime management in upconversion nanoparticles by controlling energy distribution
Authors: Wang Y.
Deng R. 
Xie X. 
Huang L.
Liu X. 
Keywords: Biological materials
Doping (additives)
Energy conversion
Optical properties
Rare earth elements
Surface defects
Energy distributions
Energy distributors
Lanthanide emission
Lanthanide-doped upconversion nanoparticles
Lifetime management
Non-linear optical properties
Photonic application
Upconversion nanoparticles
Nonlinear optics
Issue Date: 2016
Publisher: Royal Society of Chemistry
Citation: Wang Y., Deng R., Xie X., Huang L., Liu X. (2016). Nonlinear spectral and lifetime management in upconversion nanoparticles by controlling energy distribution. Nanoscale 8 (12) : 6666-6673. ScholarBank@NUS Repository.
Abstract: Optical tuning of lanthanide-doped upconversion nanoparticles has attracted considerable attention over the past decade because this development allows the advance of new frontiers in energy conversion, materials science, and biological imaging. Here we present a rational approach to manipulating the spectral profile and lifetime of lanthanide emission in upconversion nanoparticles by tailoring their nonlinear optical properties. We demonstrate that the incorporation of energy distributors, such as surface defects or an extra amount of dopants, into a rare-earth-based host lattice alters the decay behavior of excited sensitizers, thus markedly improving the emitters' sensitivity to excitation power. This work provides insight into mechanistic understanding of upconversion phenomena in nanoparticles and also enables exciting new opportunities of using these nanomaterials for photonic applications. © The Royal Society of Chemistry 2016.
Source Title: Nanoscale
ISSN: 20403364
DOI: 10.1039/c6nr00812g
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