Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Giant enhancement of upconversion emission in (NaYF4:Nd3+/Yb3+/Ho3+)/(NaYF4:Nd3+/Yb3+) core/shell nanoparticles excited at 808 nm

Not Accessible

Your library or personal account may give you access

Abstract

In this work, colloidal hexagonal-phase (NaYF4:Nd3+/Yb3+/Ho3+)/(NaYF4:Nd3+/Yb3+) core/shell nanoparticles with intense visible upconversion emissions under 808-nm laser excitation were prepared. Compared with the core-only nanoparticles, a maximum 990-fold overall enhancement in the emission intensity of Ho3+ ions was achieved with the help of active-shell coating design, due to the significant increase in the near-infrared absorption and efficient energy transfer from Nd3+ primary-sensitizers to Ho3+ activators via Yb3+ bridging sensitizers. The luminescence-enhancement effect exhibited a strong dependence on the doping concentrations of NaYF4:Nd3+/Yb3+ active-shell. The optimal concentrations of Nd3+ and Yb3+ ions in the active-shell layer were found to be 30 and 5 mol. %, respectively. Moreover, the upconversion emission intensity of NaYF4:Nd3+/Yb3+-coated nanoparticles was about 2.5 times higher than the one coated with a NaYF4:Nd3+ active-shell.

© 2015 Optical Society of America

Full Article  |  PDF Article
More Like This
Enhanced upconversion emission in colloidal (NaYF4:Er3+)/NaYF4  core/shell nanoparticles excited at 1523 nm

Wei Shao, Guanying Chen, Jossana Damasco, Xianliang Wang, Aliaksandr Kachynski, Tymish Y. Ohulchanskyy, Chunhui Yang, Hans Ågren, and Paras N. Prasad
Opt. Lett. 39(6) 1386-1389 (2014)

Modification on populating paths of β-NaYF4:Nd/Yb/Ho@SiO2@Ag core/double-shell nanocomposites with plasmon enhanced upconversion emission

Yi Qin, Zhiliang Dong, Dacheng Zhou, Yong Yang, Xuhui Xu, and Jianbei Qiu
Opt. Mater. Express 6(6) 1942-1955 (2016)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved