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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 8, Iss. 7 — Aug. 1, 2013

Shell thickness dependence of upconversion luminescence of β-NaYF4:Yb, Er/β-NaYF4 core-shell nanocrystals

Lixin Liu, Feng Qin, Hua Zhao, Tianquan Lv, Zhiguo Zhang, and Wenwu Cao  »View Author Affiliations


Optics Letters, Vol. 38, Issue 12, pp. 2101-2103 (2013)
http://dx.doi.org/10.1364/OL.38.002101


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Abstract

NaYF4:Yb, Er/NaYF4 core-shell nanocrystals with different thickness shells were synthesized. The correlation between shell thickness and upconversion (UC) luminescence intensity was investigated experimentally and theoretically. We found that the UC fluorescence intensity of the core-shell nanocrystals is enhanced exponentially with shell thickness (d) in the form of (10.9exp(d/d0). For our core-shell nanocrystals, the d0 was determined as about 5.5 nm, corresponding to an enhancement of about 12 times for the 540 nm emission intensity. The d0 may be treated as the optimized shell thickness, which represents a balance between the conflict requirements of strong UC fluorescence intensity and small total crystal size for bioapplications.

© 2013 Optical Society of America

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(160.4760) Materials : Optical properties
(260.2510) Physical optics : Fluorescence

ToC Category:
Physical Optics

History
Original Manuscript: March 26, 2013
Revised Manuscript: May 10, 2013
Manuscript Accepted: May 10, 2013
Published: June 11, 2013

Virtual Issues
Vol. 8, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Lixin Liu, Feng Qin, Hua Zhao, Tianquan Lv, Zhiguo Zhang, and Wenwu Cao, "Shell thickness dependence of upconversion luminescence of β-NaYF4:Yb, Er/β-NaYF4 core-shell nanocrystals," Opt. Lett. 38, 2101-2103 (2013)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-38-12-2101

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