Beam-profile-compensated quantum yield measurements of upconverting nanoparticles

Research output: Contribution to journalArticle


The quantum yield is a critically important parameter in the development of lanthanide-based upconverting nanoparticles (UCNPs) for use as novel contrast agents in biological imaging and optical reporters in assays. The present work focuses on the influence of the beam profile in measuring the quantum yield (φ) of nonscattering dispersions of nonlinear upconverting probes, by establishing a relation between φ and excitation light power density from a rate equation analysis. A resulting 60% correction in the measured φ due to the beam profile utilized for excitation underlines the significance of the beam profile in such measurements, and its impact when comparing results from different setups and groups across the world.


  • Monirehalsadat Mousavi
  • Björn Thomasson
  • Meng Li
  • Marco Kraft
  • Christian Würth
  • Ute Resch-Genger
  • Stefan Andersson-Engels
External organisations
  • Lund University
  • Federal Institute for Material Research and Testing (BAM) Germany
  • Tyndall National Institute
  • University College Cork
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Physical Chemistry
Original languageEnglish
Pages (from-to)22016-22022
Number of pages7
JournalPhysical Chemistry Chemical Physics
Issue number33
Publication statusPublished - 2017
Publication categoryResearch