Department of Chemistry, Maharshi Dayanand University, Rohtak, India.
Department of Physics, Netaji Subhas University of Technology, Delhi, India.
Luminescence. 2023 May;38(5):585-599. doi: 10.1002/bio.4486. Epub 2023 Mar 31.
Terbium(III)-doped yttrium aluminate perovskite (YAP:xTb ) (x = 0.01-0.08 mol) was synthesized using a simple gel-combustion method. Structural elucidations were performed using X-ray diffraction (XRD) and Rietveld analysis. Fourier-transform infrared spectral studies validated the efficient synthesis of designed doped samples. Transmission electron microscopic images showed the agglomerated irregular dimensions of the synthesized nanocrystalline materials. When excited at 251 nm, a strong emissive line attributed to D → F electronic transition was observed at 545 nm (green emission). The maximum luminescence was found at the optimized concentration (0.05 mol) of Tb ions; this emission was quenched by dipolar-dipolar (d-d) interactions. Chromaticity (x and y) and correlated colour temperature parameters were obtained by analysing the emission profiles. Finally, the colour coordinates of nanophosphors were closer to the National Television Standards Committee green coordinates, which replicates their potency in the design and architecture of R-G-B-based white LEDs.
掺铽的钇铝石榴石钙钛矿（YAP:xTb）（x=0.01-0.08 mol）是通过简单的凝胶燃烧法合成的。采用 X 射线衍射（XRD）和 Rietveld 分析进行结构解析。傅里叶变换红外光谱研究验证了设计掺杂样品的有效合成。透射电子显微镜图像显示合成的纳米晶材料的团聚不规则尺寸。在 251nm 激发下，在 545nm（绿光发射）处观察到归因于 D→F 电子跃迁的强发射线。在 Tb 离子的最佳浓度（0.05mol）下发现了最大发光强度；这种发射被偶极-偶极（d-d）相互作用猝灭。通过分析发射谱获得色度（x 和 y）和相关色温参数。最后，纳米磷光体的颜色坐标更接近国家电视标准委员会的绿色坐标，这复制了它们在基于 R-G-B 的白光 LED 的设计和架构中的效力。
