Abstract
Cu 2 Se is an earth-abundant ionic conductor with potential applications in solid electrolytes and thermoelectric devices.The ion transport characteristics of this solid are closely linked to the structural arrangement of the Cu + . While the peculiar structure of bulk Cu 2-x Se has been extensively studied, high-resolution electron microscopy (HRTEM) investigation of Cu 2-x Se nanocrystals (NC) reveals a Cu + superlattice with an unusually longrange periodicity that is not known in the bulk solid. Density functional theory (DFT) indicates that this unconventional cation arrangement is metastable but may become favored in the presence of a Cu-deficient composition or a nanoscale morphology.
Original language | English (US) |
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Pages (from-to) | 68-72 |
Number of pages | 5 |
Journal | Chemistry of Materials |
Volume | 31 |
Issue number | 1 |
DOIs | |
State | Published - Jan 8 2019 |
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
- Materials Chemistry