Single-nanocrystal studies on the homogeneity of the optical properties of NaYF4:Yb3+,Er3+

0533841 - ÚMCH 2021 RIV US eng J - Journal Article
Krajnik, B. - Golacki, L. W. - Kostiv, Uliana - Horák, Daniel - Podhorodecki, A.
Single-nanocrystal studies on the homogeneity of the optical properties of NaYF4:Yb3+,Er3+.
ACS Omega. Roč. 5, č. 41 (2020), s. 26537-26544. ISSN 2470-1343. E-ISSN 2470-1343
R&D Projects: GA ČR(CZ) GA19-00676S; GA MŠMT(CZ) 8JPL19006
Institutional support: RVO:61389013
Keywords : upconversion nanoparticles * optical properties * in vivo
OECD category: Polymer science
Impact factor: 3.512, year: 2020
Method of publishing: Open access
https://pubs.acs.org/doi/10.1021/acsomega.0c03252

Development of upconverting nanomaterials which are able to emit visible light upon near-infrared excitation opens a wide range of potential applications. Because of their remarkable photostability, they are widely used in bioimaging, optogenetics, and optoelectronics. In this work, we demonstrate the influence of several experimental conditions as well as a dopant concentration on the luminescence properties of upconverting nanocrystals (UPNCs) that need to be taken into account for their efficient use in the practical applications. We found that not only nanoparticle architecture affects the optical properties of UPNCs, but also factors such as sample concentration, excitation light power density, and temperature may influence the green-to-red emission ratio. We performed studies on both the single-nanoparticle and ensemble levels over a broad concentration range and found the heterogeneity in the optical properties of UPNCs with low dopant concentrations.
Permanent Link: http://hdl.handle.net/11104/0313559