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Article Abstract
Improving luminescence efficiency is of vital importance for applications of rare-earth-doped upconversion materials. Herein, we present highly efficient upconversion nanocrystal, which is brighter than the state-of-the-art Er/Yb co-doped core-shell material, through Er heavily doping and 1530 nm excitation. Moreover, upconversion characteristics and mechanisms of Er heavily doped core nanocrystals and their core-shell counterparts are investigated carefully.
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| http://dx.doi.org/10.1364/OL.44.000711 | DOI Listing |
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