July 10, 2003

Blue, Green, and Red Upconversion Emission from Lanthanide‐Doped LuPO4 and YbPO4 Nanocrystals in a Transparent Colloidal Solution

SHStephan HeerUniversity of Bern OLO. LehmannUniversität Hamburg MHMarkus HaaseUniversity of Bern

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Abstract

Light converter: The emission of visible light (Vis) upon excitation in the near-infrared (NIR) has been observed for the first time in a transparent solution. Excitation at 975 nm (marked red in the picture) of optically clear colloidal solutions of LuPO4:Yb3+, Tm3+, and YbPO4:Er3+ nanocrystals in chloroform leads to visible upconversion luminescence in the blue, green, or red spectral regions.

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Heer et al. (Thu,) studied this question.

synapsesocial.com/papers/6a204e8312b97f18eeb83421 https://doi.org/https://doi.org/10.1002/anie.200351091

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