Networking State of Ytterbium Ions Probing the Origin of Luminescence Quenching and Activation in Nanocrystals.

ABSTRACT: At the organic-inorganic interface of nanocrystals, electron-phonon coupling plays an important but intricate role in determining the diverse properties of nanomaterials. Here, it is reported that highly doping of Yb³⁺ ions within the nanocrystal host can form an energy-migration network. The networking state Yb³⁺ shows both distinct Stark splitting peak ratios and lifetime dynamics, which allows quantitative investigations of quenching and thermal activation of luminescence, as the high-dimensional spectroscopy signatures can be correlated to the attaching and de-attaching status of surface molecules. By in-situ surface characterizations, it is proved that the Yb-O coordination associated with coordinated water molecules has significantly contributed to this reversib

SUBMITTER: Mei S 

PROVIDER: S-EPMC7967042 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature