Corrigendum to “Effect of surface impurities on downconversion luminescence of Pr3+, Yb3+ activated SrF2 nanoparticles” [Opt. Mater. 107 (2020) 110020] (Optical Materials (2020) 107, (S0925346720303645), (10.1016/j.optmat.2020.110020))

The authors regret that in the Acknowledgements part of the article not all required sources of support were included. We would like to add the following statement to Acknowledgements: Karina Grzeszkiewicz acknowledges financial support from the National Science Centre in Poland under the ETIUDA doctoral scholarship no. 2019/32/T/ST5/00484. The authors would like to apologise for any inconvenience caused.