High-Quality Single-Source White-Light Emission in Double Perovskite Cs2NaGdCl6 Sb3+Tb3+Mn2+ for Ratiometric Optical Thermometry and Anti-Counterfeiting Applications 来源：ACS PublicationsIn lead-free halide double perovskites, doping and alloying are key strategies for optical performance enhancement. However, achieving stable full-spectrum white emission in single-component phosphors remains challenging. Herein, high-quality single-phase white emission is realized in Cs2NaGdCl6 via Sb3+/Tb3+/Mn2+ codoping. Pristine Cs2NaGdCl6 shows a weak sky-blue emission, while Sb3+ doping significantly ...
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2025
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来源：ACS PublicationsA novel orthorhombic polymorph of (NH4,Li)Eu(MoO4)2 enabled by partial substitution of NH4 with Li was synthesized via a one-pot low-temperature hydrothermal route using a Li/NH4 precursor solution. Synchrotron X-ray powder diffraction and Rietveld refinement confirmed that this phase crystallizes in an orthorhombic lattice, representing a new structure type distinct from the known triclinic and tetragonal phases (P1 and I41/a space groups). Under UV excitation, the orthorhombic ((NH4)1–xLix)Eu(MoO4)2 (x = 0.074–0.172) with Pbcn space group exhibits intense red photoluminesc...
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2025
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A Mixed-Anion Design Approach for High-Efficiency X-ray Scintillators A Study of KLn(SO4)F2 (Ln = Eu, Gd, Tb, Dy, Ho, and Tm) 来源：ACS PublicationsHigh-quality single crystals of mixed anion rare earth sulfate fluorides KLn(SO4)F2 (Ln = Eu, Gd, Tb, Dy, Ho, and Tm), monoclinic space group P21/m, were obtained using an HF-free mild hydrothermal synthesis. Thermal, magnetic, and optical properties of these materials were investigated after determining their crystal structures and their chemical compositions using a combination of single-crystal and powder X-ray diffraction. Notably, the photol...
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2025
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Vacuum-Induced Reversible Phase Transformation of Rare-Earth Difluoroacetates Insights into Structural Evolution, Kinetics, and Luminescence Response 来源：ACS PublicationsRare-earth difluoroacetate Eu1–xTbx(dfa)3(H2O)2·H2O (dfa = CF2HCOO) exhibits a pressure-dependent crystalline-to-semicrystalline phase transformation similar to that reported for the trifluoroacetate series. This transformation occurs when pressure is decreased below 100 mTorr and is driven by removal of crystallization water and aquo ligands; both types of water molecules participate in hydrogen-bond networks sustain...
Release time:
2025
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