RT Journal Article
T1 Impact of excitation pulse width on the upconversion luminescence lifetime of NaYF4: Yb3+,Er3+ nanoparticles
A1 Casillas Rubio, Alejandro
A1 Méndez González, Diego
A1 Laurenti, Marco
A1 Rubio Retama, Benito Jorge
A1 Gómez Calderón, Óscar
A1 Melle Hernández, Sonia
AB The upconversion luminescence (UCL) lifetime has a wide range of applications, serving as a critical parameter for optimizing the performance of upconversion nanoparticles (UCNPs) in various fields. It is crucial to understand that this lifetime does not directly correlate with the decay time of the emission level; rather, it represents a compilation of all the physical phenomena taking place in the upconversion process. To delve deeper into this, we analyzed the dependence of the UCL lifetime on the excitation pulse width for β-NaYF4:Yb3+,Er3+ nanoparticles. The results revealed a significant increase in the UCL lifetime with both the excitation pulse width and the excitation intensity. The laser fluence was identified as the parameter governing the UCL decay dynamics. We showcased the universality of the pulse-width-dependent UCL lifetime phenomenon by employing UCNPs of various sizes, surface coatings, host matrices, Yb3+ and Er3+ ratios, and dispersing UCNPs in different solvents. Theoretical explanations for the experimental findings were derived through a rate equation analysis. Finally, we discussed the implications of these results in UCNP-FRET (Förster resonance energy transfer)-based applications.
PB Royal Society of Chemistry
YR 2024
FD 2024
LK https://hdl.handle.net/20.500.14352/109165
UL https://hdl.handle.net/20.500.14352/109165
LA eng
NO A. Casillas-Rubio, D. Mendez-Gonzalez, M. Laurenti, J. Rubio-Retama, O. G. Calderón and S. Melle, Impact of excitation pulse width on the upconversion luminescence lifetime of NaYF 4 :Yb 3+ ,Er 3+ nanoparticles, Nanoscale, 2024, 16, 12184–12195.
NO Contrato pre doctoral de Alejandro Casillas Rubio concedido por UCM-Santander (CT15/23).
NO 2024 Acuerdos transformativos CRUE
NO Comunidad de Madrid (España)
NO Ministerio de Ciencia, Innovación y Universidades (España)
NO Universidad Complutense de Madrid (España)
DS Docta Complutense
RD 6 abr 2025