WG1 - Materials Research & Photophysical Characterization

Developing and exchanging standardised protocols and reference materials for the synthesis of highly luminescent UCNMs and their photo-physical characterisation

The major objectives for the Materials Research and Photophysical Characterization working group are the following :

Enhancement of UC efficiency

  • Which core-shell architectures, dopands, sizes, surface chemistries
  • etc. yield improved UC efficiencies
  • Plasmonic enhancement
  • FRET systems for sensing applications

Identification of energy loss channels by time-dependent luminescence spectroscopy in the UV/vis/NIR/IR (UC- & DC PL)

  • Decay kinetics of different emission bands and different excitation wavelengths: rise times and decay times
  • UCNP dispersed in different matrices vs. solid UCNP & um-sized materials

UC Reference materials for method establishment and validation and testing of new instrumentation

Developing techniques and protocols for the standardized

characterization of the PL properties of UCNPs

  • To improve the comparability of material performance among all members of the network
  • To identify UC particle architectures (sizes, core-shell structures, dopant concentrations, surface chemistries etc.) that yield improved UC PL efficiencies
  • To rationally design the next generation of UCNPs
  • To develop reference materials with well characterized application relevant features including PL properties (power density-dependent QYUC, QYUSsat , PL decay kinetics) for the  establishment of comparable PL measurements of UCNPs within the network and to test new instrumentation
  • To develop excitation power density dependent UC QY measurements techniques and analysis


Dr. Ute Resch-Genger

Division Biophotonics

BAM Federal Institute for Materials

Research and Testing

Richard-Willstaetter-Str. 11

D-12489 Berlin

Phone: ++49(0) 30 8104-1134

Fax: ++49(0) 30 8104-1157

Mobile: ++49(0) 174-9302761

The working group achievements :

  1. Broadening temperature sensitivity range with core-shell YbEr@YbNd double ratiometric optical nanothermometer, L. Marciniak, K. Prorok, L. Francés-Soriano, J. Pérez-Prieto and A. Bednarkiewicz*, accepted in Nanoscale 2016
  2. Energy transfer in diiodoBodipy-grafted Q1 upconversion nanohybrids, Laura Francés-Soriano,Marta Liras, Agnieszka Kowalczyk, Artur Bednarkiewicz,Maria González-Béjar and Julia Pérez-Prieto, Nanoscale, 2016, 8, 204


COST Action CM1403 (2014-2018)

Chair: dr Hans Gorris (University of Regensburg, Germany)

Vice-Chair: prof.Tero Soukka (University of Turku, Finland)

COST Science Officer: Dr. Lucia Forzi (Bruseels, Belgium)

STSMs Manager: dr hab. Artur Bednarkiewicz (PAS & WCB EIT+, Poland)


info @ ucnp.eu


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