On the Efficiency of Yb3+‐Er3+ Activated Up‐Conversion Phosphors
- 1 May 1975
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 122 (5) , 660-663
- https://doi.org/10.1149/1.2134287
Abstract
Efficiencies of Yb3+‐Er3+ activated up‐conversion phosphors are determined by the efficiency of the excitation process and by that of the final emission process in the Er3+ ion. The former process is dependent on the infrared excitation density. We measured the efficiency of the emission process by excitation to selected Er3+ levels for various host lattices and as a function of Yb3+ and Er3+ concentrations. For one of the best up‐conversion phosphors known at present, , the efficiency of the green emission, is about 6%.Keywords
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