Full text loading...
(a) Typical TEM image for Er-doped heat-treated at 800° C for 24 h. (b) Confocal image of green and red up-conversion florescence from individual Er-doped nanocrystals.
Up-conversion emission spectrum of -doped produced with excitation.
Energy level diagram of and the possible excitation and de-excitation pathways leading to the observed up-conversion bands.
Quadratic dependence of the emission intensity on concentration for nanocrystals.
Article metrics loading...