Alkali metal quaternary nanomaterials
AssigneeUniversity of the Witwatersrand, Johannesburg
InventorsNosipho Moloto, Kalenga Mubiayi, Grace Ngubeni
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Abstract
This disclosure relates to the manufacture an alkali metal quaternary crystalline nanomaterial. an alkali metal quaternary crystalline nanomaterial having general Formula A (I2-II-IV-VI4); and wherein I is sodium (Na) or lithium (Li), II and IV are Zn or Sn, and VI is a chalcogens selected from the group comprising: sulphur (S), selenium (Se) or tellurium (Te). The crystal phase of the alkali metal quaternary crystalline nanomaterial may be a primitive mixed Cu—Au like structure (PMCA) and may have a space group: P42m. The nanomaterials may be adapted to provide a solar cell. Methods of manufacture are also provided.
Claims11
An alkali metal quaternary crystalline nanomaterial having general Formula A, wherein Formula A is I2-II-IV-VI4, wherein the nanomaterial is selected from the group consisting of Li2ZnSnSe4 (LZTSe), Na2ZnSnSe4 (NZTSe), Li2ZnSnS4 (LZTS), and Na2ZnSnS4 (NZTS);
- wherein a crystal phase of the crystalline nanomaterial is not kesterite and/or stannite;
- and
- wherein the crystal phase of the nanomaterial is a primitive mixed Cu—Au like structure (PMCA) and the nanomaterial has a space group:
- P42m.
Dependencies are inferred from the claim text.