Excitation dependent visible and NIR photoluminescence properties of Er³⁺, Yb³⁺ co-doped NaBi(MoO₄)₂ nanomaterials

Abstract

Er3+, Yb3+ co-doped NaBi(MoO4)2 nanomaterials show excitation dependent photoluminescence properties in the visible and NIR regions upon excitation with UV, visible and NIR light.

Tunable Broadband NIR PL Emissions with (Nd3+/Er3+) Codoped TiO2 via Synergetic Energy Transfer

“…Similarly, we studied the excitation-dependent PL emission bands for Er-doped TiO 2 over the excitation wavelength range of (340 to 840 nm). Under the blue light excitation, Er-doped TiO 2 showed a broad PL emission over a wavelength range of 1220 nm to 1600 nm, which is identical to the NIR emission of TiO 2 with a slight enhancement. When excited with the green light (524 nm), Er 3+ exhibited two PL emission bands at 1532 and 980 nm, corresponding to Er 3+ 4f–4f transition.…”

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

“…The probability of this process increases with temperature according to the Miyakawa-Dexter theory. 31,141,142 On the other hand, Kuck et al explained the increase in the Mn 3+ emission at elevated temperatures in terms of the thermal population from the 3 T 1 state. 143 The thermal evolution of LIR 1 for the series of 20 nm nanocrystals with different manganese concentrations is presented in Fig.…”

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.…”

“…This might be due to the lack of synthesis methods suitable to produce particles with the characteristics required for in vivo bioapplications, which include a uniform shape, narrow size distribution within the nanometer range, dispersibility in physiological media, and biocompatibility. In fact, most reported procedures for the preparation of NaBi(MoO 4 ) 2 -based phosphors involve solid-state reactions, 12,13 coprecipitation, 14–16 or sol-combustion methods, 17 yielding particles with a heterogeneous size and shape and in most cases, a high aggregation degree.…”