Percolation limited emission intensity from upconverting NaYF4:Yb3+,Er3+ nanocrystals - a single nanocrystal optical study

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F18%3A00496957" target="_blank" >RIV/61389013:_____/18:00496957 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1039/C8NR05961F" target="_blank" >http://dx.doi.org/10.1039/C8NR05961F</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/C8NR05961F" target="_blank" >10.1039/C8NR05961F</a>

Result language

angličtina

Original language name

Percolation limited emission intensity from upconverting NaYF4:Yb3+,Er3+ nanocrystals - a single nanocrystal optical study

Original language description

Upconverting nanocrystals (UCNC) have recently been subjected to intensive investigation due to their interesting optical properties and high potential for practical applications. Despite the level of attention paid to these materials, very low quantum yield is still an important issue. In order to break through this limitation, understanding of the emission intensity limitation is crucial. In this paper, we investigate the influence of percolation phenomena on the limitation of the emission intensity from NaYF4:Yb3+,Er3+ nanocrystals. We propose a numerical model and support this experimentally at the single nanocrystal level, explaining the influence of Yb3+ concentration on the optical properties of UCNC. Moreover, based on the experimental and numerical results, we explain the existence of the optimal Yb3+ concentration in the core architecture often reported in the literature. All the measurements have been performed using a custom-built wide-field fluorescence microscope to analyze the emission from hundreds of single nanocrystals and thus make analysis independent of UCNC concentration.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10404 - Polymer science

Project

<a href="/en/project/GA15-01897S" target="_blank" >GA15-01897S: Magnetic or 90Y-radiolabeled light-upconverting nanoparticles for photodynamic therapy or radiotherapy of tumors</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Nanoscale

ISSN

2040-3364

e-ISSN

—

Volume of the periodical

10

Issue of the periodical within the volume

45

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

21186-21196

UT code for WoS article

000451738900027

EID of the result in the Scopus database

2-s2.0-85056921925