López-Esquivel R I, Garduño-Wilches I A, Guzmán-Olguín J C, Rivera Montalvo T, Guzmán-Mendoza J
Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Instituto Politécnico Nacional, Calzada Legaria 694, Col. Irrigación, Alc. Miguel Hidalgo, 11500, Ciudad de México, Mexico.
Cátedras Conacyt/Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Instituto Politécnico Nacional, Calzada Legaria 694, Col. Irrigación, Alc. Miguel Hidalgo, 11500, Ciudad de México, Mexico.
Appl Radiat Isot. 2022 Aug;186:110266. doi: 10.1016/j.apradiso.2022.110266. Epub 2022 Apr 30.
The present work reports the study of the thermally coupled energy levels of the trivalent europium ion in the barium hafnate matrix, in the temperature range of 289.7-323.8 K, through the application of ultraviolet radiation. Barium hafnate doped with 1, 3, and 5 atomic % trivalent europium ion was synthesized by the hydrothermal route, using chlorides as precursor elements. X-ray diffraction analysis indicates that the material crystallized in the perovskite cubic phase of barium hafnate, according to diffraction card file number #24-0102. Using high-resolution transmission electron microscopy, it was observed that the obtained crystals have an average size of 10 nm. From the photoluminescent analysis at room temperature, it was found that the sample doped with 3.0% atomic of trivalent europium displayed with the highest luminescent emission, while the photoluminescent analysis as a function of temperature showed that the bands associated with the D → F (J = 1,2,3,4) transitions have a strong dependence on temperature in the physical range.
本研究报告了通过施加紫外线辐射，在289.7 - 323.8 K温度范围内，对铪酸钡基质中三价铕离子热耦合能级的研究。采用水热法，以氯化物作为前驱体元素，合成了掺杂1%、3%和5%原子分数三价铕离子的铪酸钡。X射线衍射分析表明，根据衍射卡片编号#24 - 0102，该材料结晶为铪酸钡的钙钛矿立方相。使用高分辨率透射电子显微镜观察到，所获得的晶体平均尺寸为10 nm。从室温下的光致发光分析发现，掺杂3.0%原子分数三价铕的样品具有最高的发光发射，而作为温度函数的光致发光分析表明，与D→F（J = 1,2,3,4）跃迁相关的能带在该物理范围内对温度有强烈依赖性。
