Ca/Si Modification of the (Gd,Lu)AG Garnet for Enhanced Broadband Cr Luminescence of High Thermal Stability.

Near-infrared (NIR)-emitting phosphors with high quantum efficiency and thermal stability are crucial to NIR pc-LEDs. Garnet-structured (GdLuCa)(AlSiCr)O ( = 0.01-0.

Strategy to optimize the broadband near-infrared emission based on Eu-doped sulfureted garnet phosphors toward emerging spectroscopy applications.

Eu-doped near-infrared (NIR) emitting phosphors, known for their high efficiency, broadband emission and spectral tunability, have gained much attention. However, achieving efficient NIR emission based on Eu remains a challenge due to the co-existence of Eu, especially in materials (i.e.

Rational Design of Nitride Phosphor-In-Glass with Robust Stability and Photoluminescence Performance.

Phosphor-in-glass represents a promising avenue for merging the luminous efficiency of high-quality phosphor and the thermal stability of a glass matrix. Undoubtedly, the glass matrix system and its preparation are pivotal factors in achieving high stability and preserving the original performance of embedded phosphor particles. In contrast to the well-established commercial YAlO:Ce oxide phosphor, red nitride phosphor, which plays a critical role in high-quality lighting, exhibits greater structural instability during the high-temperature synthesis of inorganic glasses.

Defect-induced deep red luminescence of CaGdAlO-type layered perovskites: multi-cationic sites partial/full substitution and application in pc-LED and plant lighting.

A series of CaGdAlO-type layered perovskite phosphors showing deep red luminescence ( = 711 nm, = 338 nm) were synthesized a solid-state reaction. A comprehensive analysis performed photoluminescence, X-ray photoelectron spectroscopy, thermoluminescence, and fluorescence decay revealed that the deep red luminescence is related to oxygen defects and particularly oxygen interstitials. The defect-related luminescence was effectively regulated through partial substitution of multi-cationic sites (the Ca site with Mg, Sr, and Ba; the Gd site with La, Y, and Lu) and full substitution of Gd with Y.

Modulation of Bi luminescence from broadband green to broadband deep red in LuWO by Gd doping and its applications in high color rendering index white LED and near-infrared LED.

Phosphors that exhibit tunable broadband emissions are highly desired in multi-functional LEDs, including pc-WLEDs and pc-NIR LEDs. In this work, broadband emissions were obtained and modulated in the unexpectedly wide spectral range of 517-609 nm for (LuGdBi)WO phosphors by tuning the Gd content ( = 0-0.99).

Systematic Crystallization of NHLn(MoO) as a Family of Layered Compounds (Ln = La-Lu and Y), Derivation of LnMoO, Crystal Structure, and Photoluminescence.

NHLn(MoO) (Ln = La-Lu lanthanide, Y) was crystallized via hydrothermal reaction as a new family of layered materials, from which phase-pure LnMoO was successfully derived via subsequent annealing at 700 °C for the series of Ln elements excluding Ce and Lu. Detailed structure analysis revealed that the ionic size of Ln decisively determined the crystal structure and Mo/Ln coordination for the two families of compounds. NHLn(MoO) was analyzed to be orthorhombic ( space group, no.

Remarkable structure and luminescence regulation of a GdLuAlO:Ce garnet phosphor with a Ca/Si pair for high-quality w-WLED lighting.

Doping GdLuAlO:Ce with a Ca/Si pair produced a series of GdLuCaAlSiO:0.03Ce ( = 0.0-1.

Doping Pb in LaAlO to generate dual emission centers and an optical storage container for visible and near infrared persistent luminescence.

Defects play an important role in luminescence, not only as non-radiative transition centers to decrease the luminescence intensity, but also as useful centers for improving luminescence. Phosphors with unique characteristics can be designed by using effective defects combined with the luminescence center. Here, a novel phosphor of LaAlO:Pb was synthesized by a solid state reaction.

Site-selective and cooperative doping of GdAlO:Ce garnets for structural stabilization and warm WLED lighting of low CCT and high CRI.

Synergistic doping of the metastable GdAlO:Ce garnet with a Ca/Hf pair and Sc to form GdCaHfScAlO:0.03Ce ( = 0.5-2.

KLn(MoO) micro/nanocrystals (Ln = La-Lu, Y): systematic hydrothermal crystallization, structure, and the performance of doped Eu for optical thermometry.

Systematic crystallization of KLn(MoO) double molybdate micro/nanocrystals was achieved in this work for the family of lanthanide elements (excluding Pm) and Y hydrothermal reaction under the optimized conditions of pH = 7, Mo/Ln molar ratio = 5 and 200 °C, with which the intrinsic influence of lanthanide contraction on phase preference, crystallite morphology (size/shape) and crystal structure was clearly revealed. Extended synthesis also produced KLaEu(MoO) (KLM:Eu) and KYEu(MoO) (KYM:Eu) red phosphors, and detailed spectral analysis found that the layered structure of orthorhombic KYM allows Eu to have a high quenching content of ∼70 at% ( = 0.7) and higher quantum efficiency and thermal stability of luminescence.

Malate-aided selective crystallization and luminescence comparison of tetragonal and monoclinic LaVO:Eu nanocrystals.

With malate (Mal2-) as a new type of chelate, tetragonal (t-) and monoclinic (m-) structured LaVO4:Eu crystals (∼10-60 nm) were selectively crystallized as nanosquares and nanorods via a hydrothermal reaction at 200 °C for 24 h. The effects of the Mal2-:(La,Eu)3+ molar ratio, solution pH and Eu3+ content on the phase structure and crystal morphology were systematically investigated and elucidated. The competition between OH- and Mal2- toward rare earth ions was discussed to play a critical role in phase selection, and the t-phase can only be fabricated at pH ∼ 6-8 with the assistance of Mal2-.

New Mg/Ge-Stabilized GdMgGeAlO:Ce Garnet Phosphor with Orange-Yellow Emission for Warm-White LEDs ( = 2.0-2.5).

By stabilization of the GdAlO garnet by replacing 80% or more of Al with Mg/Ge pairs, a series of new orange-yellow-emitting GdMgGeAlO:Ce ( = 2.0-2.5) phosphors were successfully developed for potential application in warm-white-light-emitting diodes (WLEDs).

On the role of Zr substitution in structure modification and photoluminescence of LiLa(TaZr)O:Eu garnet phosphors.

Solid-state reaction at 1000 °C produces a series of Li-stuffed Li5+2x(La1-yEuy)3(Ta1-xZrx)2O12 garnet phosphors (x = 0-1, y = 0.05-0.6) that exhibit favorable efficiency and thermal stability for red luminescence under either blue or n-UV light excitation, where the optimal composition was identified to be x = 0.

A groundbreaking strategy for fabricating YAG:Ce transparent ceramic films sintering of LRH nanosheets on a sapphire substrate.

Here, we proposed a groundbreaking strategy for fabricating YAG:Ce3+ transparent ceramic films via a novel interface reaction of LRH nanosheets with a sapphire substrate without a tedious process. The incorporation of Gd3+ greatly enhanced the emission intensity of the ceramic film by ∼11.3 times.

Upconversion luminescence and favorable temperature sensing performance of eulytite-type SrY(PO):Yb/Ln phosphors (Ln=Ho, Er, Tm).

Phase-pure eulytite-type SrY(PO):0.10Yb,0.02Ln upconversion (UC) phosphors (Ln = Ho, Er, Tm) were synthesized gel-combustion and subsequent calcination at 1250°C.

Morphology Tailoring of ZnWO Crystallites/Architectures and Photoluminescence of the Doped RE Ions (RE = Sm, Eu, Tb, and Dy).

Tartrate (Tar) was originally employed in this work as a chelating/structure-directing agent for hydrothermal crystallization of ZnWO, where the decisive roles of Tar/Zn/WO molar ratio, solution pH (7-10), and the use of ethylene glycol (EG) cosolvent in phase/morphology evolution were deciphered in detail. It was unambiguously manifested that Tar may remarkably retard the intrinsically preferred [001] growth of ZnWO, transform 1D nanorods to 0D nanoparticles and then to 2D platelets, and meanwhile induce face-to-face alignment of the platelets to form spheroidal, ellipsoidal and snowflakelike 3D architectures, where the 2D crystallites were revealed to develop via oriented attachment (colattice) of non-(00) facets. A lower solution pH and excessive WO were clearly shown to enhance and offset the effect of Tar, which led to ellipsoidal assemblies of substantially larger 2D crystallites and suppressed 2D growth/3D assembly of ZnWO crystallites, respectively.

Grafting of terbium(iii) complexes onto layered rare-earth hydroxide nanosheets to fabricate novel optical fiber temperature sensors.

Optical sensors of temperature possess the unique advantages of contactless measurement and large-scale imaging. Developments have been rapidly made in optical fiber sensors due to their high sensitivity, short response time, and electromagnetic immunity, and being easy to handle and light weight. Therefore, novel optical sensors of temperature based on optical fibers were fabricated to explore their application in special environments, such as poisonous, sparkless, currentless, and gelid ones.

ZnGaGeO:Cr Uniform Microspheres: Template-Free Synthesis, Tunable Bandgap/Trap Depth, and Rechargeable Near-Infrared-Persistent Luminescence.

Near-infrared (NIR) emitting persistent phosphors of Cr-doped zinc gallogermanate have emerged for bioimaging with the advantage of no need for excitation. However, it is challenging to synthesize well-dispersed and uniform spherical particles with high brightness, high resolution, and distinguished NIR long afterglow. In this work, ZnGaGeO:Cr (ZGGC) monospheres were directly synthesized by a facile hydrothermal method with the assistance of citric anions (Cit), which emit an NIR emission at ∼696 nm and exhibit excellent NIR-persistent luminescence with rechargeability.

Multi-Color Luminescent m-LaPO:Ce/Tb Monospheres of High Efficiency via Topotactic Phase Transition and Elucidation of Energy Interaction.

Monoclinic (m-) structured (LaCeTb )PO phosphor monospheres ( x = 0-0.12) of excellent dispersion and morphology uniformity were calcined (≥600 °C) from their precipitated precursor spheres (∼2.0 μm) of a hexagonal (h-) structure for efficient and multicolor luminescence.

NaLaWO(OH)(HO): Crystal Structure and RE Luminescence in the Pristine and Annealed Double Tungstates (RE = Eu, Tb, Sm, and Dy).

Hydrothermal reaction of La(NO) and NaWO·2HO at 100 °C and pH 8 resulted in the formation of new compound NaLaWO(OH)(HO), as confirmed by the X-ray diffraction results, chemical composition, Fourier transform infrared, thermogravimetric/differential thermal analysis, and transmission electron microscopy analyses. The crystal structure was determined in the triclinic system (space group P1̅), with lattice constants a = 5.8671(2) Å, b = 8.

Luminescent Thermometry by a Y/Eu Binary Layered Rare-Earth Hydroxide (LRH) via In Situ Intercalation with Neutral Terbium(III) Complexes.

Temperature-sensitive luminescent materials have aroused great interest for practical applications in optical sensors. Layered rare-earth hydroxides (LRHs) possess rich interlayer chemistry and adjustable composition; thus, they are the promising candidates for designing functional materials, usually through an ion exchange process. Herein, the intercalation of neutral Tb complex rather than ion exchange was successfully performed in situ into the gallery of Y/Eu binary LRHs by using a hydrothermal process.

Crystal Structure of NaLuWO·2HO and Down/Upconversion Luminescence of the Derived NaLu(WO):Yb/Ln Phosphors (Ln = Ho, Er, Tm).

Hydrothermally reacting Lu(NO) and NaWO·2HO at 200 °C and pH = 8 produced the new compound NaLuWO·2HO, which was analyzed via the Rietveld technique to crystallize in the orthorhombic system (space group: Cmmm) with cell parameters a = 21.655(1), b = 5.1352(3), and c = 3.

Downregulation of RASSF6 promotes breast cancer growth and chemoresistance through regulation of Hippo signaling.

This study aims to investigate the clinical significance and biological function of RASSF6 in human breast cancers. RASSF6 protein was found to be downregulated in 42 of 95 human breast cancer tissues by immunohistochemistry, which was associated with advanced TNM stage and nodal metastasis. The rate of RASSF6 downregulation was higher in Triple-negative breast cancer (TNBC).

Selective Crystallization of Four Tungstates (LaWO, LaWO, LaWO, and LaWO) via Hydrothermal Reaction and Comparative Study of Eu Luminescence.

Hydrothermal reaction at 200 °C was systematically undertaken in wide ranges of solution pH (4-13) and W/La molar ratio ( R = 0.5-2), without using any organic additive, to investigate the effect of hydrothermal parameter on product property and the underlying mechanism. Combined analysis by X-ray diffraction (XRD), inductively coupled plasma (ICP) spectroscopy, elemental mapping, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed that either a decreasing pH or increasing R value yielded a product richer in W and, conversely, richer in La.

TRIM32 promotes proliferation and confers chemoresistance to breast cancer cells through activation of the NF-κB pathway.

Dysregulation of TRIM32 has been implicated in several human cancers, however, its clinical significance and biological function in breast cancer have not been investigated. Using immunohistochemistry, we found that TRIM32 expression is upregulated in breast cancer tissues and that it correlates with advanced stage and poor prognosis. TRIM32 is also overexpressed in 4/7 breast cancer cell lines.