Temperature dependence of broadband near-infrared luminescence from Ni2+-doped Ba0.5Sr0.5TiO3

Abstract

Simultaneous observation of up/down conversion photoluminescence and colossal permittivity properties in (Er+Nb) co-doped TiO 2 materials

Ferroelectric thin films: performance modulation and application

“…45 Through inserting luminescent centers into ferroelectric thin films, high-performance optical materials were constructed, such as Er/Yb co-doped BaTiO 3 thin films 46 and Ni-doped Ba 0.5 Sr 0.5 TiO 3 thin films. 47…”

“…45 Through inserting luminescent centers into ferroelectric thin films, high-performance optical materials were constructed, such as Er/Yb co-doped BaTiO 3 thin films 46 and Ni-doped Ba 0.5 Sr 0.5 TiO 3 thin films. 47 Compositional modulation can change the chemical and defect structure of materials, and plays an important role in the regulation of ferroelectric material properties, such as remanent polarization, leakage current, fatigue, and piezoelectric properties, etc. The chemical method is a universal application to modify kinds of ferroelectric thin films grown on various substrates.…”

Colossal Permittivity Materials as Superior Dielectrics for Diverse Applications

“…[274] The other type is determined by activators, which could be lanthanide ions (Ln 3+ ) or transition-metal (TM) ions doped into the host dielectric material, as shown in Figure 1Sa. [270,[275][276][277][278][279][280] The luminescence can be generated from a partly filled f or shell in Ln 3+ and TM ions. For example, narrow and sharp emission lines of 4f-4f transitions and broad lines of 5 -4f transitions can be observed since the 4f orbitals of Ln 3+ ions are shielded by the filled 5s 2 and 5p 6 orbitals.…”

Transition Metal Ion-Based Nanocrystalline Luminescent Thermometry in SrTiO3:Ni2+,Er3+ Nanocrystals Operating in the Second Optical Window of Biological Tissues

“…11,15 To date, Ni 2+ -doped glasses and ceramics have been used as an active media in tunable lasers, broadband amplifiers, solar cells, novel display technologies, and high-density optical storage and infrared sensors due to their excellent optical properties. 37,38 However, its ability of noncontact temperature sensing has never been investigated, on the contrary to Er 3+ ions, in which green emission has already been exploited for the aim of luminescence thermometry. 39−41 Introducing Ni 2+ ions to the nanocrystalline matrix enables us to exploit the spectral range of the II OW, much more favorable in terms of medicine due to reduced autofluorescence and scattering effects in tissues, which is a significant advancement compared to the previously used TM ions.…”

“…Its spectroscopic properties are the result of incompletely filled d shells, providing numerous energy levels in between which d–d optical transitions may occur. Owing to the fact that 3d electrons participate in bond creation, all TM ions are highly susceptible to local symmetry changes. , To date, Ni 2+ -doped glasses and ceramics have been used as an active media in tunable lasers, broadband amplifiers, solar cells, novel display technologies, and high-density optical storage and infrared sensors due to their excellent optical properties. , However, its ability of noncontact temperature sensing has never been investigated, on the contrary to Er 3+ ions, in which green emission has already been exploited for the aim of luminescence thermometry. − Introducing Ni 2+ ions to the nanocrystalline matrix enables us to exploit the spectral range of the II OW, much more favorable in terms of medicine due to reduced autofluorescence and scattering effects in tissues, which is a significant advancement compared to the previously used TM ions. Therefore, in this paper, spectroscopic properties of SrTiO 3 :Ni 2+ ,Er 3+ nanocrystals of different grain sizes and dopant concentrations were comprehensively investigated in a wide temperature range with special emphasis on the verification of their applicative potential in luminescence thermometry.…”