Abstract
Synthesis of KGdF4: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 (1G4→3H6) 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.
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