来源：ACS PublicationsMetal cation doping in hybrid perovskite semiconductors is one of the most effective approaches for tailoring their optoelectronic properties. However, their location-dependent functional mechanisms within the photoactive layer of perovskite solar cells (PSCs) remain poorly understood. Herein, we report that redox-stable samarium cations (Sm3+) enhance the performance of the PSC via partial substitution of lead ions (Pb2+). The optimized concentration of Sm3+ (5%) modulates the crystal quality, defect density, and charge carrier behavior of the perovskite layer. As a result,...
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2025
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Crystalline Order Yet Glass-Like Heat Transport Driven by Hidden Local Distortions as the Structural Origin of Ultralow Thermal Conductivity in AgErTe2来源：ACS PublicationsGiven their rich chemical diversity and the interplay among the p-, d-, and f-orbitals of chalcogens, transition metals, and lanthanides, respectively, rare-earth transition-metal chalcogenides exhibit a wide variety of structural, magnetic, and transport phenomena. As a result, they form a particularly appealing platform for investigating structure–property relationships, emergent electronic and magnetic behaviors, and therma...
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2025
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来源：ACS PublicationsRare-earth delafossites, ARCh2; A = alkali metal, R = rare-earth, Ch = chalcogen which consist of intercalated rare-earth metal dichalcogenides, host frustrated triangular lattices that are fertile ground for exotic phenomena. In most cases, the triangular rare-earth sublattice arises from R-3m (No. 166) structures with three layers of rare-earth metal dichalcogenide octahedra or P63/mmc (No. 194) structures with two such layers, analogous to those found in transition metal dichalcogenides. Substituting the alkali metal with Cu+ yields a distinct trigonal crystal symmetry─P-...
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2025
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A Trifunctional, Rare-Earth Theranostic Chelator Platform to Enable Diagnostic Nuclear Imaging, Surgical Resection, and Radiotherapy 来源：ACS PublicationsHere, we establish a single-molecule, trifunctional platform compatible with diagnostic positron emission tomography (PET), optical imaging-assisted intrasurgical resection, and chelation of radiotherapeutic rare-earth nuclides. Building on previous pyridylalkynylaryl (PEPA) antenna scaffolds, mono- and bisantenna analogs incorporating either PEPA or methoxy-substituted MEPA chromophores were prepared to assess the role of pyridylalkynylaryl nu...
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2025
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