Gs. Qin et al., Up-converting Yb3+-Er3+ co-doped amorphous fluoride thin films prepared bypulsed-laser deposition for visible light source, SOL ST COMM, 120(5-6), 2001, pp. 211-214
Yb3+-Er3+ co-doped amorphous Zn0.3Al0.25Pb0.3Li0.1-xYbyErxF2.05+2x+3y films
have been prepared by pulsed-laser deposition (PLD). Violet, green, red an
d ultraviolet (UV) up-conversion emissions were observed under the infrared
excitation at 950 nm. In comparison with the up-conversion of the target,
the violet and UV emissions are enhanced greatly. The enhancement is attrib
uted to the enrichment of Yb concentration in the sample during PLD. (C) 20
01 Published by Elsevier Science Ltd.