For the development and optimization of novel light emitting materials, such as fluorescent proteins, dyes and semiconductor quantum dots (QDs), a reliable and robust analysis of the emission efficiency is crucial. The emission efficiency is typically quantified by the photoluminescence quantum yield (QY), defined by the ratio of emitted to absorbed photons. We show that this methodology suffers from a flaw that leads to underestimated QY values, presenting as a 'parasitic absorption'. This effect has not been described and/or corrected for in literature and is present already under common experimental conditions, therefore, it is highly relevant for a number of published studies. To correct for this effect, we propose a modification to the methodology and a correction procedure.
@article{arxiv.1808.00779,
title = {On a critical artifact in the quantum yield methodology},
author = {Bart van Dam and Benjamin Bruhn and Ivo Kondapaneni and Gejza Dohnal and Alexander Wilkie and Jaroslav Křivánek and Jan Valenta and Yvo Mudde and Peter Schall and Kateřina Dohnalová},
journal= {arXiv preprint arXiv:1808.00779},
year = {2018}
}