Systematical, experimental investigations on LiMgZ (Z= P, As, Sb) wide band gap semiconductors

This work reports on the experimental investigation of the wide band gap compounds LiMgZ (Z = P, As, Sb), which are promising candidates for opto-electronics and anode materials for Lithium batteries. The compounds crystallize in the cubic (C1_b) MgAgAs structure (space group F-43m). The polycrystal...

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Bibliographic Details
Published in:arXiv.org 2011-08
Main Authors: Beleanu, Andreea, Mondeshki, Mihail, Quin, Juan, Casper, Frederick, Porcher, Florence, Felser, Claudia
Format: Article
Language:English
Subjects:
Anodes
Band gap
Batteries
Chemical synthesis
Direct current
Electrode materials
Ionic mobility
Lithium batteries
Lithium isotopes
Neutron diffraction
NMR
Nuclear magnetic resonance
Reflectance
Wide bandgap semiconductors
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Summary:This work reports on the experimental investigation of the wide band gap compounds LiMgZ (Z = P, As, Sb), which are promising candidates for opto-electronics and anode materials for Lithium batteries. The compounds crystallize in the cubic (C1_b) MgAgAs structure (space group F-43m). The polycrystalline samples were synthesized by solid state reaction methods. X-ray and neutron diffraction measurements show a homogeneous, single-phased samples. The electronic properties were studied using the direct current (DC) method. Additionally UV-VIS diffuse reflectance spectra were recorded in order to investigate the band gap nature. The measurements show that all compounds exhibit semiconducting behavior with direct band gaps of 1.0 eV to 2.3 eV depending on the Z element. A decrease of the peak widths in the static 7Li nuclear magnetic resonance (NMR) spectra with increasing temperature was observed, which can directly be related to an increase of Li ion mobility.
ISSN:2331-8422
DOI:10.48550/arxiv.1108.0584