Jung Jae-Yong
Research and Business Development Foundation, Engineering Building, Silla University, Busan 45985, Korea.
Materials (Basel). 2022 Mar 11;15(6):2078. doi: 10.3390/ma15062078.
Crystalline CaMoO and rare-earth-doped CaMoO:RE (RE = Tb, Eu) phosphors were synthesized at room temperature using a co-precipitation method. The crystal structure of the synthesized powder was a tetragonal structure with a main diffraction peak (112) phase. When CaMoO was excited at 295 nm, it showed a central peak of 498 nm and light emission in a wide range of 420 to 700 nm. Rare-earth-ion-doped CaMoO:Tb was excited at 288 nm and a green light emission was observed at 544 nm, and CaMoO:Eu was excited at 292 nm and a red light emission was observed at 613 nm. To take advantage of the light-emitting characteristics, a flexible composite was manufactured and a color filter that could be used for UV-LEDs was manufactured. In addition, it was suggested that an ink that could be checked only by UV light could be produced and applied to banknotes so as to prevent counterfeiting.
采用共沉淀法在室温下合成了晶体CaMoO和稀土掺杂的CaMoO:RE（RE = Tb，Eu）荧光粉。合成粉末的晶体结构为四方结构，主衍射峰为（112）相。当CaMoO在295 nm处被激发时，它在498 nm处显示出一个中心峰，并在420至700 nm的宽范围内发光。稀土离子掺杂的CaMoO:Tb在288 nm处被激发，在544 nm处观察到绿色发光，而CaMoO:Eu在292 nm处被激发，在613 nm处观察到红色发光。为了利用发光特性，制造了一种柔性复合材料，并制造了一种可用于紫外发光二极管的滤色器。此外，还提出可以生产一种只能通过紫外光检测的墨水，并应用于纸币以防止伪造。
