“…As such, Er 3þ has potential applications in optoelectronic devices as layer transformers of IR radiation to visible radiation (upconversion). [3][4][5] Er 3þ has an intense emission band near 1.54 lm, wherein the optical absorption of silica fibers is the lowest, thus making it a prospective material for applications in the telecommunications industry as a light emission component. 6 Moreover, numerous studies on Er 2 O 3 coatings have revealed the potential applications of these materials as tritium diffusion barriers, 7,8 corrosion-resistant electrical insulation layers, 9 and radiation-resistant layers 10 in nuclear fusion.…”