Right here, we current the luminescent anti-counterfeiting varnish modified with NaErF4:Tm3+@NaYF4 UCNPs to shield paper or other surfaces. This perform demonstrates the impact of co-doping the NaErF4 Main with Tm3+ ions in the core@shell NaErF4:Tm3+@NaYF4 UCNPs and the improvement of UC depth. The Vitality trapping facilities development, which reduce the https://geniusbookmarks.com/story13648512/helping-the-others-realize-the-advantages-of-anti-counterfeit-solution