Oxygen concentration as a combinatorial parameter: The effect of continuous oxygen vacancy variation on SnO2 layer conductivity
| Autor: | Arie Zaban, Maayan Priel, Elana Borvick, Kevin J. Rietwyk, David A. Keller, Assaf Y. Anderson, Hannah-Noa Barad, Simcha Meir, Adam Ginsburg |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
02 engineering and technology Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Metal Wavelength Electrical resistivity and conductivity Chemical physics visual_art visual_art.visual_art_medium General Materials Science Limiting oxygen concentration 0210 nano-technology Chemical composition Stoichiometry Transparent conducting film |
| Zdroj: | Materials Chemistry and Physics. 208:289-293 |
| ISSN: | 0254-0584 |
| Popis: | Combinatorial materials science is a powerful approach to discover new materials, especially by using the continuous compositional spread (CCS) method, which forms spatially varying stoichiometry across a sample. Though the chemical composition of the candidate materials is typically the primary parameter studied, in the case of metal oxides CCS the oxygen concentration is usually either neglected or studied in a discrete and non-combinatorial manner. The present work reports the use of oxygen concentration as a combinatorial parameter that varies continuously across a sample, using a pulsed laser deposited (PLD) SnO2 film as a model system. As the oxygen concentration decreases, the SnO2 crystal lattice expands, the number of defects is increased, and the electrical conductivity rises exponentially. A relatively low electrical resistivity of 8.16∙10−4 Ω cm is achieved. The sample also showed superior infrared transparency, 67% at 2000 nm, compared to commercial F:SnO2 (FTO) which is only 12% transparent at this wavelength. The improved transparency and conductivity were achieved within a single experiment, without any additional optimization steps, and with further improvement may allow reconsideration of SnO2 as a transparent conductive oxide. Our findings serve as a demonstration for the importance of oxygen concentration as a combinatorial parameter. |
| Databáze: | OpenAIRE |
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