Direct Band Gap Semiconductors with Two- and Three-Dimensional Triel-Phosphide Frameworks (Triel=Al, Ga, In).

Recently, several ternary phosphidotrielates and -tetrelates have been investigated with respect to their very good ionic conductivity, while less focus was pointed towards their electronic structures. Here, we report on a novel series of compounds, in which several members possess direct band gaps. We investigated the known compounds LiAlP, LiGaP, LiInP, and NaInP and describe the synthesis and the crystal structure of novel NaInP.

Surface-Anisotropic Janus Silicon Quantum Dots via Masking on 2D Silicon Nanosheets.

Surface-anisotropic nanoparticles represent a new class of materials that shows potential in a variety of applications, including self-assembly, microelectronics, and biology. Here, the first synthesis of surface-anisotropic silicon quantum dots (SiQDs), obtained through masking on 2D silicon nanosheets, is presented. SiQDs are deposited on the 2D substrate, thereby exposing only one side of the QDs, which is functionalized through well-established hydrosilylation procedures.

Supertetrahedral polyanionic network in the first lithium phosphidoindate LiInP - structural similarity to LiSiP and LiGeP and dissimilarity to LiAlP and LiGaP.

Phosphide-based materials have been investigated as promising candidates for solid electrolytes, among which the recently reported LiAlP displays an ionic conductivity of 3 mS cm. While the phases Li-Al-P and Li-Ga-P have already been investigated, no ternary indium-based phosphide has been reported up to now. Here, we describe the synthesis and characterization of the first lithium phosphidoindate LiInP, which is easily accessible ball milling of the elements and subsequent annealing.

NaTaP: A Ternary Sodium Phosphidotantalate Containing [TaP] Tetrahedra.

While lithium phosphides have been investigated intensively, very little is known about the corresponding sodium-based phosphides. Here, we report on the first ternary Na-Ta-P compound NaTaP, which is easily accessible via ball milling of the elements and subsequent annealing. The single crystal X-ray structure determination [monoclinic symmetry; space group 2/; and lattice parameters = 11.