A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Frequency-Domain Method for Characterization of Upconversion Luminescence Kinetics
Tekijät: Labrador-Páez Lucía, Kankare Jouko, Hyppänen Iko, Soukka Tero, Andresen Elina, Resch-Genger Ute, Widengren Jerker, Liu Haichun
Kustantaja: AMER CHEMICAL SOC
Julkaisuvuosi: 2023
Journal: Journal of Physical Chemistry Letters
Tietokannassa oleva lehden nimi: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Lehden akronyymi: J PHYS CHEM LETT
Vuosikerta: 14
Numero: 14
Aloitussivu: 3436
Lopetussivu: 3444
Sivujen määrä: 9
ISSN: 1948-7185
DOI: https://doi.org/10.1021/acs.jpclett.3c002693436
Verkko-osoite: https://doi.org/10.1021/acs.jpclett.3c00269
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/179460051
The frequency-domain (FD) method provides an alternative to the commonly used time-domain (TD) approach in characterizing the luminescence kinetics of luminophores, with its own strengths, e.g., the capability to decouple multiple lifetime components with higher reliability and accuracy. While extensively explored for characterizing luminophores with down-shifted emission, this method has not been investigated for studying nonlinear luminescent materials such as lanthanide-doped upconversion nanoparticles (UCNPs), featuring more complicated kinetics. In this work, employing a simplified rate-equation model representing a standard two-photon energy-transfer upconversion process, we thoroughly analyzed the response of the luminescence of UCNPs in the FD method. We found that the FD method can potentially obtain from a single experiment the effective decay rates of three critical energy states of the sensitizer/activator ions involved in the upconversion process. The validity of the FD method is demonstrated by experimental data, agreeing reasonably well with the results obtained by TD methods.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
