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Facile One‐step Synthesis of Zn 1– x Mn x SiN 2 Nitride Semiconductor Solid Solutions via Solid‐state Metathesis Reaction
Author(s) -
Zeman Otto E. O.,
von Rohr Fabian O.,
Neudert Lukas,
Schnick Wolfgang
Publication year - 2020
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201900315
Subject(s) - materials science , metathesis , salt metathesis reaction , solid solution , orthorhombic crystal system , analytical chemistry (journal) , nitride , band gap , semiconductor , stoichiometry , inorganic chemistry , chemistry , crystallography , crystal structure , nanotechnology , polymerization , organic chemistry , layer (electronics) , metallurgy , composite material , polymer , optoelectronics
We report on the synthesis of the II‐IV‐N 2 semiconductors ZnSiN 2 , MnSiN 2 , and the Zn 1– x Mn x SiN 2 solid solutions by a one‐step solid‐state metathesis reaction. The successful syntheses were carried out by reacting the corresponding metal halides with stoichiometric amounts of silicon nitride and lithium azide in sealed tantalum ampoules. After washing out the reaction byproduct LiCl, powder X‐ray diffraction patterns were indexed with orthorhombic space group Pna 2 1 . Single phase products were obtained without applying external pressure and at a moderate reaction temperature of 700 °C. The resulting ZnSiN 2 was found to consist of nano‐sized grains and needle‐shaped nano‐crystals. With increasing manganese content in the Zn 1– x Mn x SiN 2 solid solution, we found the reaction product to be increasingly crystalline. Both the cell parameters and the bandgap values across the different compositions of the solid solutions change linearly. The sample Zn 0.95 Mn 0.05 SiN 2 synthesized by means of solid‐state metathesis reaction is an intense red emitter with a broad emission maximum at λ max ≈ 619 nm when excited with ultraviolet light after annealing the sample at a pressure of 6 GPa and a temperature of 1200 °C.