1. Up-conversion luminescence and EPR properties of KGdF4:Yb3+/Tm3+ nanophosphors.
- Author
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Prasad, Aman, Rao, A.S., and Prakash, G.Vijaya
- Subjects
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ENERGY transfer , *EXCITED states , *BLUE light , *LUMINESCENCE - Abstract
• Sub 10 nm KGdF 4 :Yb3+/Tm3+ UCNPs were prepared via wet chemical route. • HR-TEM, EDAX and EPR studies were performed. • UCNPs exhibit visible emission under NIR excitation. • The UCNPs have high lifetimes ranging from 0.38-0.41 ms. • These UCNPs can be used for bio-photonic applications. Synthesis of KGdF 4 :Yb3+/Tm3+ up-conversion nanoparticles (UCNPs) via wet chemical route has been reported. HR-TEM, EDAX and EPR studies were performed on the samples. The samples emit intense blue light centred at 472 nm (1G 4 →3H 6) under 980 nm CW laser excitation. Energy transfer (ET), ground/excited state absorption (ESA/GSA) and cooperative energy transfer (CET) were established as the possible energy transfer mechanisms in the up-conversion (UC) process. Since these UCNPs, synthesized by a much cost effective route, have sizes comparable at cellular level and exhibit the ability of up-conversion, we propose to utilize these UCNPs for prospective bio-photonic applications. [ABSTRACT FROM AUTHOR] more...
- Published
- 2020
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