Journal article 1109 views
Charge transfer doping of graphene without degrading carrier mobility
Haichang Lu,
Yuzheng Guo 
,
John Robertson
,
John Robertson
Journal of Applied Physics, Volume: 121, Issue: 22, Start page: 224304
Swansea University Author:
Yuzheng Guo
Full text not available from this repository: check for access using links below.
DOI (Published version): 10.1063/1.4985121
Abstract
Density functional calculations are used to analyze the charge transfer doping mechanism by molecules absorbed onto graphene. Typical dopants studied are AuCl3, FeCl3, SbF5, HNO3, MoO3, Cs2O, O2, and OH. The Fermi level shifts are correlated with the electron affinity or ionization potential of the...
| Published in: | Journal of Applied Physics |
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| ISSN: | 0021-8979 1089-7550 |
| Published: |
2017
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa34541 |
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| Abstract: |
Density functional calculations are used to analyze the charge transfer doping mechanism by molecules absorbed onto graphene. Typical dopants studied are AuCl3, FeCl3, SbF5, HNO3, MoO3, Cs2O, O2, and OH. The Fermi level shifts are correlated with the electron affinity or ionization potential of the dopants. We pay particular attention to whether the dopants form direct chemisorptive bonds which cause the underlying carbon atoms to pucker to form sp3 sites as these interrupt the π bonding of the basal plane, and cause carrier scattering and thus degrade the carrier mobility. Most species even those with high or low electronegativity do not cause puckering. In contrast, reactive radicals like -OH cause puckering of the basal plane, creating sp3 sites which degrade mobility. |
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| Keywords: |
Graphene, Doping, Band structure, Carrier mobility, Chemical bonds |
| College: |
Faculty of Science and Engineering |
| Issue: |
22 |
| Start Page: |
224304 |