Upconversion luminescence properties of NaBi(MoO4)2:Ln3+, Yb3+ (Ln = Er, Ho) nanomaterials synthesized at room temperature

KYb2F7:Er3+ based nanothermometers: controlled synthesis, enhanced red emission, and improved sensitivities via crystal-site engineering

“…Under 980 nm laser excitation, the UC luminescence spectra exhibit several emission peaks at 405, 520, 543, and 655 nm, which are attributed to the 2 H 9/2 → 4 I 15/2 , 2 H 11/2 → 4 I 15/2 , 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions of Er 3+ ions, respectively. 2,77 The UC emission intensity is increased with increasing of KF dose (cubic (KYb 3 F 10 ) < orthorhombic (KYb 2 F 7 ) < hexagonal (KYbF 4 )), and more importantly, the intensity ratio amongst the green/red emissions has also been affected. The UC emission intensity of the orthorhombic KYb 2 F 7 is far better (∼6 times higher) than the cubic KYb 3 F 10 .…”

“…(b) presents the UC emission spectra of the prepared nanocrystals in the range of 350-850 nm with varying the KF dose. Under 980 nm laser excitation, the UC luminescence spectra exhibit several emission peaks at 405, 520, 543, and 655 nm, which are attributed to the 2 H 9/2 -4 I 15/2 , 2 H 11/2 -4 I 15/2 , 4 S 3/2 -4 I 15/2 and 4 F 9/2 -4 I 15/2 transitions of Er 3+ ions, respectively 2,77. The UC emission intensity is increased with increasing of KF dose (cubic (KYb 3 F 10 ) o orthorhombic (KYb 2 F 7 ) o hexagonal (KYbF 4…”

A review on the structural dependent optical properties and energy transfer of Mn4+ and multiple ion-codoped complex oxide phosphors

“…Therefore, Mn 4+ and rare earth ions codoped in a single host lattice can be applied in a luminescent thermometer. [135][136][137][138] The structural coordinate diagram in Fig. 23e proposes a possible mechanism for elucidating the high temperature sensitivity of Mn 4+ and rare earth ion (such as Eu 3+ /Tb 3+ and Dy 3+ ) codoped samples.…”

Europium doped-double sodium bismuth molybdate nanoparticles as contrast agents for luminescence bioimaging and X-ray computed tomography

“…See DOI: https://doi.org/ 10.1039/d2qi02664c a Instituto de Ciencia de Materiales de Sevilla (CSIC-Universidad de Sevilla), c/ Américo Vespucio, 49, 41092 Sevilla, Spain. E-mail: mjurado@icmse.csic.es b Centro Andaluz de Biología del Desarrollo (CABD), Universidad Pablo de Olavide (UPO), Molecular Biology and Biochemical Engineering Department, CSIC/UPO/JA, Carretera de Utrera Km1, 41013-Sevilla, Spain (MoO 4 ) 2 -based phosphors involve solid-state reactions, 12,13 coprecipitation, [14][15][16] or sol-combustion methods, 17 yielding particles with a heterogeneous size and shape and in most cases, a high aggregation degree.…”