Synthesis of n-type CuInS2 Particles Using N-methylimidazole, Characterization and Growth Mechanism
| Autor: | Fabrice M. Courtel, Benoît Marsan, Mario Morin, Gregory Hersant, Amer Hammami, Régis Imbeault, Royston W. Paynter |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Annealing (metallurgy) Chalcopyrite General Chemical Engineering Inorganic chemistry Analytical chemistry chemistry.chemical_element General Chemistry Electrochemistry Redox Solvent symbols.namesake X-ray photoelectron spectroscopy chemistry visual_art Materials Chemistry symbols visual_art.visual_art_medium Raman spectroscopy Indium |
| Zdroj: | Chemistry of Materials. 22:3752-3761 |
| ISSN: | 1520-5002 0897-4756 |
| DOI: | 10.1021/cm100750z |
| Popis: | We report on the growth of CuInS2 n-type semiconductive particles, prepared using N-methylimidazole, as a solvent and/or a complexing agent, as well as their chemical and electrochemical properties. XPS, EDX and ICP-AES have shown that an excess of indium was obtained, which was greater at the surface (CuIn1.19S1.7 at 500 °C) than in the bulk (CuIn1.07S1.9 at 500 °C). Solid state Raman spectroscopy revealed two crystalline phases: chalcopyrite and the so-called copper−gold phase, and by increasing the annealing temperature of the particles, the formation of the chalcopyrite phase is favored. UV−visible measurements showed that the n-type CuInS2 possesses a direct bandgap energy of 1.55 eV. To perform the capacitance measurements on a CuInS2 film by EIS, we used two organic redox couples in nonaqueous media: 5-mercapto-1-methyltetrazolate (T−)/di-5-(1-methyltetrazole) disulfide (T2), and 5-trifluoromethyl-2-mercapto-1,3,4-thiadiazolate (G−)/5,5′-bis(2-trifluoromethyl-1,3,4-thiadiazole) disulfide (G2). Usin... |
| Databáze: | OpenAIRE |
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