Abstract
We report a novel and cost-effective 3D printing technology by using NaYF4:Yb3+/Tm3+ up-conversion microcrystals to produce internal deep ultraviolet (UV) light centers as a light curing source in the polymer matrix by near infrared light excitation. Excellent up-conversion emission from NaYF4:Yb3+/Tm3+ microcrystals is demonstrated by using microcrystals as gain medium to realize up-conversion lasing emission centered at 291, 346 and 364 nm. This 3D printing technique, in which a low cost semiconductor laser is used, is potential to print large structures at high printing efficiency.
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