Kolesnikov I E, Kalinichev A A, Kurochkin M A, Golyeva E V, Terentyeva A S, Kolesnikov E Yu, Lähderanta E
St. Petersburg State University, 7/9 Universitetskaya nab., 199034, St. Petersburg, Russia.
Lappeenranta University of Technology LUT, Skinnarilankatu 34, 53850, Lappeenranta, Finland.
Sci Rep. 2019 Feb 14;9(1):2043. doi: 10.1038/s41598-019-38774-6.
We report systematic study of Dy-doped YVO nanophosphors synthesized via modified Pechini technique. Effect of calcination temperature and doping concentration on structure and luminescence has been investigated. XRD and Raman spectroscopy revealed preparation of single phase nanoparticles without any impurities. Synthesized nanopowders consisted of weakly agglomerated nanoparticles with average size about 50 nm. Photoluminescence spectra of YVO:Dy nanoparticles consisted of the characteristic narrow lines attributed to the intra-configurational 4f-4f transitions dominating by the hypersensitive F-H transition. The calcination temperature variation did not affect F lifetime, whereas increase of doping concentration resulted in its gradual decline. Potential application of YVO:Dy 1 at.% and 2 at.% nanopowders as ratiometric luminescence thermometers within 298-673 K temperature range was tested. The main performances of thermometer including absolute and relative thermal sensitivities and temperature uncertainty were calculated. The maximum relative thermal sensitivity was determined to be 1.8% K@298 K, whereas the minimum temperature uncertainty was 2 K.
我们报道了通过改进的佩琴尼技术合成的Dy掺杂YVO纳米磷光体的系统研究。研究了煅烧温度和掺杂浓度对结构和发光的影响。X射线衍射和拉曼光谱表明制备出了无任何杂质的单相纳米颗粒。合成的纳米粉末由平均尺寸约为50nm的弱团聚纳米颗粒组成。YVO:Dy纳米颗粒的光致发光光谱由归因于超灵敏F-H跃迁主导的组态内4f-4f跃迁的特征窄线组成。煅烧温度变化不影响F寿命，而掺杂浓度增加导致其逐渐下降。测试了1at.%和2at.%的YVO:Dy纳米粉末在298-673K温度范围内作为比率发光温度计的潜在应用。计算了温度计的主要性能，包括绝对和相对热灵敏度以及温度不确定度。确定最大相对热灵敏度为1.8% K@298K，而最小温度不确定度为2K。
