Selective Nanocrystal Synthesis and Calculated Electronic Structure of All Four Phases of Copper–Antimony–Sulfide
| Autor: | William H. Butler, Arunava Gupta, Hunter Sims, Karthik Ramasamy |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Materials science Sulfide business.industry Band gap General Chemical Engineering Tetrahedrite Analytical chemistry chemistry.chemical_element Nanotechnology General Chemistry engineering.material Copper Semiconductor Nanocrystal chemistry Antimony Materials Chemistry engineering Electronic band structure business |
| Zdroj: | Chemistry of Materials. 26:2891-2899 |
| ISSN: | 1520-5002 0897-4756 |
| Popis: | A wide variety of copper-based semiconducting chalcogenides have been investigated in recent years to address the need for sustainable solar cell materials. An attractive class of materials consisting of nontoxic and earth abundant elements is the copper–antimony–sulfides. The copper–antimony–sulfide system consists of four major phases, namely, CuSbS2 (Chalcostibite), Cu12Sb4S13 (Tetrahedrite), Cu3SbS3 (Skinnerite), and Cu3SbS4 (Fematinite). All four phases are p-type semiconductors having energy band gaps between 0.5 and 2 eV, with reported large absorption coefficient values over 105 cm–1. We have for the first time developed facile colloidal hot-injection methods for the phase-pure synthesis of nanocrystals of all four phases. Cu12Sb4S13 and Cu3SbS3 are found to have direct band gaps (1.6 and 1.4 eV, respectively), while the other two phases display indirect band gaps (1.1 and 1.2 eV for CuSbS2 and Cu3SbS4, respectively). The synthesis methods yield nanocrystals with distinct morphology for the differ... |
| Databáze: | OpenAIRE |
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