High-Efficiency Thermoelectrics with Functionalized Graphene
Graphene superlattices made with chemical functionalization offer the possibility of tuning both the thermal and electronic properties via nanopatterning of the graphene surface. Using classical and quantum mechanical calculations, we predict that suitable chemical functionalization of graphene can...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Chemical Society (ACS)
2016
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| Online Access: | http://hdl.handle.net/1721.1/102526 https://orcid.org/0000-0003-1281-2359 |
| _version_ | 1826192472235048960 |
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| author | Kim, Jeong Yun Grossman, Jeffrey C. |
| author2 | Massachusetts Institute of Technology. Department of Chemical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Chemical Engineering Kim, Jeong Yun Grossman, Jeffrey C. |
| author_sort | Kim, Jeong Yun |
| collection | MIT |
| description | Graphene superlattices made with chemical functionalization offer the possibility of tuning both the thermal and electronic properties via nanopatterning of the graphene surface. Using classical and quantum mechanical calculations, we predict that suitable chemical functionalization of graphene can introduce peaks in the density of states at the band edge that result in a large enhancement in the Seebeck coefficient, leading to an increase in the room-temperature power factor of a factor of 2 compared to pristine graphene, despite the degraded electrical conductivity. Furthermore, the presence of patterns on graphene reduces the thermal conductivity, which when taken together leads to an increase in the figure of merit for functionalized graphene by up to 2 orders of magnitude over that of pristine graphene, reaching its maximum ZT ∼ 3 at room temperature according to our calculations. These results suggest that appropriate chemical functionalization could lead to efficient graphene-based thermoelectric materials. |
| first_indexed | 2024-09-23T09:15:19Z |
| format | Article |
| id | mit-1721.1/102526 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:15:19Z |
| publishDate | 2016 |
| publisher | American Chemical Society (ACS) |
| record_format | dspace |
| spelling | mit-1721.1/1025262022-09-26T11:09:45Z High-Efficiency Thermoelectrics with Functionalized Graphene Kim, Jeong Yun Grossman, Jeffrey C. Massachusetts Institute of Technology. Department of Chemical Engineering Massachusetts Institute of Technology. Department of Materials Science and Engineering Kim, Jeong Yun Grossman, Jeffrey C. Graphene superlattices made with chemical functionalization offer the possibility of tuning both the thermal and electronic properties via nanopatterning of the graphene surface. Using classical and quantum mechanical calculations, we predict that suitable chemical functionalization of graphene can introduce peaks in the density of states at the band edge that result in a large enhancement in the Seebeck coefficient, leading to an increase in the room-temperature power factor of a factor of 2 compared to pristine graphene, despite the degraded electrical conductivity. Furthermore, the presence of patterns on graphene reduces the thermal conductivity, which when taken together leads to an increase in the figure of merit for functionalized graphene by up to 2 orders of magnitude over that of pristine graphene, reaching its maximum ZT ∼ 3 at room temperature according to our calculations. These results suggest that appropriate chemical functionalization could lead to efficient graphene-based thermoelectric materials. 2016-05-18T15:44:36Z 2016-05-18T15:44:36Z 2015-04 2015-03 Article http://purl.org/eprint/type/JournalArticle 1530-6984 1530-6992 http://hdl.handle.net/1721.1/102526 Kim, Jeong Yun, and Jeffrey C. Grossman. “High-Efficiency Thermoelectrics with Functionalized Graphene.” Nano Lett. 15, no. 5 (May 13, 2015): 2830–2835. https://orcid.org/0000-0003-1281-2359 en_US http://dx.doi.org/10.1021/nl504257q Nano Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Chemical Society (ACS) MIT web domain |
| spellingShingle | Kim, Jeong Yun Grossman, Jeffrey C. High-Efficiency Thermoelectrics with Functionalized Graphene |
| title | High-Efficiency Thermoelectrics with Functionalized Graphene |
| title_full | High-Efficiency Thermoelectrics with Functionalized Graphene |
| title_fullStr | High-Efficiency Thermoelectrics with Functionalized Graphene |
| title_full_unstemmed | High-Efficiency Thermoelectrics with Functionalized Graphene |
| title_short | High-Efficiency Thermoelectrics with Functionalized Graphene |
| title_sort | high efficiency thermoelectrics with functionalized graphene |
| url | http://hdl.handle.net/1721.1/102526 https://orcid.org/0000-0003-1281-2359 |
| work_keys_str_mv | AT kimjeongyun highefficiencythermoelectricswithfunctionalizedgraphene AT grossmanjeffreyc highefficiencythermoelectricswithfunctionalizedgraphene |