Structural, optical, and hole transport properties of earth-abundant chalcopyrite (CuFeS2) nanocrystals
| Autor: | Khagendra P. Bhandari, Ebin Bastola, Nikolas J. Podraza, Randy J. Ellingson, Indra Subedi |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Chalcopyrite Analytical chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Copper Cadmium telluride photovoltaics 0104 chemical sciences chemistry.chemical_compound Tetragonal crystal system Nanocrystal chemistry Bromide visual_art visual_art.visual_art_medium General Materials Science Thin film 0210 nano-technology Ternary operation |
| Zdroj: | MRS Communications. 8:970-978 |
| ISSN: | 2159-6867 2159-6859 |
| DOI: | 10.1557/mrc.2018.117 |
| Popis: | Here, we report thiol-free thermal-injection synthesis of chalcopyrite (CuFeS2) nanocrystals (NCs) using iron (II) bromide (FeBr2), copper (II) acetaylacetonate (Cu(acac)2), and elemental sulfur (S). Controlled reaction temperature and growth time yield stable and phase-pure ternary CuFeS2 NCs exhibiting tetragonal crystal structure. With increasing growth time from 1 to 30 min, absorption peak slightly red shifts from 465 to 490 nm. Based on spectroscopic ellipsometry analysis, three electronic transitions at 0.652, 1.54, and 2.29 eV were found for CuFeS2 NC film. Also, CuFeS2 NC thin films are incorporated as hole transport layers in cadmium telluride solar cells reaching an efficiency of ~12%. |
| Databáze: | OpenAIRE |
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