Size-dependent surface energy loss in nanocrystalline YBO3:Eu3+
Document Type
Oral Presentation
Campus where you would like to present
SURC Ballroom A
Start Date
17-5-2012
End Date
17-5-2012
Abstract
(Y,Gd)BO3:Eu3+ is a commonly used plasma-display television phosphor, with high host to activator energy-transfer efficiency. My project is working to quantify the effects of energy loss to the surface on this efficiency. Host-to activator transfer efficiency calculations for nanocrystalline (~50-500 nm) YBO3:Eu3+ show measurable surface loss for particles as large as 300 nm. Spectroscopic data describing absorbed and emitted energies were evaluated with published kinetic models and show size-dependent surface loss, increasing as particle size decreases, with approximately 40% of energy lost to the surface for particles smaller than 100 nm. Further research focuses on testing the kinetic models with different host lattices (specifically YPO4), with current work involving gaussian curve fitting to accurately quantify peak height for absorbance and excitation intensity.
Recommended Citation
Lawler, Andrew and Olson, Kristopher, "Size-dependent surface energy loss in nanocrystalline YBO3:Eu3+" (2012). Symposium Of University Research and Creative Expression (SOURCE). 77.
https://digitalcommons.cwu.edu/source/2012/posters/77
Poster Number
26
Additional Mentoring Department
Chemistry
Size-dependent surface energy loss in nanocrystalline YBO3:Eu3+
SURC Ballroom A
(Y,Gd)BO3:Eu3+ is a commonly used plasma-display television phosphor, with high host to activator energy-transfer efficiency. My project is working to quantify the effects of energy loss to the surface on this efficiency. Host-to activator transfer efficiency calculations for nanocrystalline (~50-500 nm) YBO3:Eu3+ show measurable surface loss for particles as large as 300 nm. Spectroscopic data describing absorbed and emitted energies were evaluated with published kinetic models and show size-dependent surface loss, increasing as particle size decreases, with approximately 40% of energy lost to the surface for particles smaller than 100 nm. Further research focuses on testing the kinetic models with different host lattices (specifically YPO4), with current work involving gaussian curve fitting to accurately quantify peak height for absorbance and excitation intensity.
Faculty Mentor(s)
Anthony Diaz