BROWSE

Related Scientist

Researcher

나노입자 연구단
나노입자 연구단
more info

The preferred upconversion pathway for the red emission of lanthanide-doped upconverting nanoparticles, NaYF4:Yb3+,Er3+

Cited 27 time in webofscience Cited 0 time in scopus
156 Viewed 3 Downloaded
Title
The preferred upconversion pathway for the red emission of lanthanide-doped upconverting nanoparticles, NaYF4:Yb3+,Er3+
Author(s)
Jung T.; Jo H.L.; Nam S.H.; Byeongjun Yoo; Cho Y.; Kim J.; Kim H.M.; Taeghwan Hyeon; Suh Y.D.; Lee H.; Lee K.T.
Publication Date
2015-04
Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.17, no.20, pp.13201 - 13205
Publisher
ROYAL SOC CHEMISTRY
Abstract
Lanthanide-doped upconverting nanoparticles (UCNPs, NaYF4:Yb3+,Er3+) are well known for emitting visible photons upon absorption of two or more near-infrared (NIR) photons through energy transfer from the sensitizer (Yb3+) to the activator (Er3+). Of the visible emission bands (two green and one red band), it has been suggested that the red emission results from two competing upconversion pathways where the non-radiative relaxation occurs after the second energy transfer (pathway A, 4I15/2 → 4I11/2 → 4F7/2 → 2H11/2 → 4S3/2 → 4F9/2 → 4I15/2) or between the first and the second energy transfer (pathway B, 4I15/2 → 4I11/2 → 4I13/2 → 4F9/2 → 4I15/2). However, there has been no clear evidence or thorough analysis of the partitioning between the two pathways. We examined the spectra, power dependence, and time profiles of UCNP emission at either 980 nm or 488 nm excitation, to address which pathway is preferred. It turned out that the pathway B is predominant for the red emission over a wide range of excitation powers. This journal is © the Owner Societies
URI
https://pr.ibs.re.kr/handle/8788114/2356
ISSN
1463-9076
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
physical chemistry(the preferred).pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse