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.

中文翻译：

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红外感应的深紫外内部光中心，可实现新颖的高性价比3D打印

我们报告了一种新颖且具有成本效益的3D打印技术，该技术通过使用NaYF ₄：Yb ³⁺ / Tm ³⁺上转换微晶产生内部深紫外（UV）光中心作为近红外光在聚合物基质中作为光固化源励磁。NaYF ₄：Yb ³⁺ / Tm ³⁺微晶具有优异的上转换发射特性，该证明是通过使用微晶作为增益介质实现以291、346和364 nm为中心的上转换激光发射。这种使用低成本半导体激光器的3D打印技术具有以高打印效率打印大型结构的潜力。