Skip to main content

Imaging Upconversion from NaYF4:Er:Yb Nanoparticles on Au and Ag Nanostructured Substrates

  • Lanlan Zhong (a1), QuocAnh Luu (a2), Hari P. Paudel (a3), Khadijeh Bayat (a3), Mahdi Farrokh Baroughi (a3), P. Stanley May (a2) and Steve Smith (a1)...

Near-infrared-to-visible upconversion materials have many promising applications, including use in luminescent solar concentrators, in next-generation displays, and as biological labels. NaYF4 nano-particles doped with Yb and Er exhibit efficient upconversion and are easily deployed in these applications. It is known that a rough metal surface may increase the yield of fluorescence of a nearby fluorophore, by local field enhancement due to plasmonic resonances, and by modification of the radiative rate(s) of the fluorophore. Thus, properly chosen metallic nanostructures can potentially increase the upconversion efficiency of lanthanide-doped nanoparticles, yet the optimal design of these nanostructures is still an active area of research. In our experiments, we use a spectroscopic imaging system to study the upconversion efficiency of NaYF4: Er3+/ Yb3+ through spatially-resolved upconversion spectra, using a custom-built scanning confocal microscope system with infra-red excitation, and wide-field fluorescence imaging. We present spectrally-resolved upconversion images of NaYF4:Yb3+/Er3+ nanoparticles on plasmonic substrates, including silver nanowires and patterned substrates of gold and silver, which show localized regions (∼ 1μm) of relatively stronger intensity and modified upconversion spectra, and compare these to wide-field fluorescence images of samples with and without plasmonic substrates.

Corresponding author
*Corresponding Author:
Hide All
[1]Baluschev, S., Miteva, T., Yakutkin, V., et al. ., “Up-Conversion Fluorescence: Noncoherent Excitation by Sunlight,” Phys. Rev. Lett. 97 143903 (2006).
[2]Luque, Antonio and Marti’, Antonio, “Increasing the Efficiency of Ideal Solar Cells by Photon Induced Transitions at Intermediate Levels,” Phys. Rev. Lett. 78(26)5014 (1997).
[3]Peng, R.W., Mazzer, M., Barnham, K.W.J., “Efficiency enhancement of ideal photovoltaic solar cells by photonic excitatons in multi-intermediate band structures,” Appl. Phys. Lett. 83(4) 770(2003).
[4]Schaller, R. D. and Klimov, V. I., “High Efficiency Carrier Multiplication in PbSe Nanocrystals: Implications for Solar Energy Conversion,” Phys. Rev. Lett. 92 186601 (2004).
[5]Schaller, Richard D. and Klimov, Victor I., “Non-Poissonian Exciton Populations in Semiconductor Nanocrystals via Carrier Multiplication,” Phys. Rev. Lett. 96 097402 (2006).
[6]Smith, G.B., “ Materials and systems for efficient … delivery of daylightSolar Cell Mat., 84 395 (2004).
[7]Lakowicz, J.R, “Radiative decay engineering: biophysical…applicationsAnalytical Biochemistry 298 1 (2001).
[8]Aslan, K., LakowiczJ, R. J, R., Geddes, C.D., “Metal-enhanced fluorescence using anisotropic silver nanostructures: critical progress to date”, Anal. Bioanal. Chem. 382 926 (2005).
[9]Lin, Cuikun, Berry, Mary T., Anderson, Robert, Smith, Steve, and Stanley May, P., “Highly Luminescent NIR-to-Visible Upconversion Thin Films and Monoliths Requiring No High- Temperature Treatment,” Chem. of Materials 21 (14), 3406-3413(2009).
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
  • URL: /core/journals/mrs-online-proceedings-library-archive
Please enter your name
Please enter a valid email address
Who would you like to send this to? *



Full text views

Total number of HTML views: 0
Total number of PDF views: 7 *
Loading metrics...

Abstract views

Total abstract views: 145 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 23rd July 2018. This data will be updated every 24 hours.