Thermoelectric properties of nanoporous Ge
We computed thermoelectric properties of nanoporous Ge (np-Ge) with aligned pores along the [001] direction through a combined classical molecular dynamics and first-principles electronic structure approach. A significant reduction in the lattice thermal conductivity of np-Ge leads to a 30-fold incr...
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| Format: | Article |
| Language: | en_US |
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American Institute of Physics (AIP)
2013
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| Online Access: | http://hdl.handle.net/1721.1/79650 https://orcid.org/0000-0003-1281-2359 |
| _version_ | 1826212546805235712 |
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| author | Lee, Joo-Hyoung Grossman, Jeffrey C. |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Lee, Joo-Hyoung Grossman, Jeffrey C. |
| author_sort | Lee, Joo-Hyoung |
| collection | MIT |
| description | We computed thermoelectric properties of nanoporous Ge (np-Ge) with aligned pores along the [001] direction through a combined classical molecular dynamics and first-principles electronic structure approach. A significant reduction in the lattice thermal conductivity of np-Ge leads to a 30-fold increase in the thermoelectric figure-of-merit (ZT) compared to that of bulk. Detailed comparisons with the recently proposed np-Si show that although the maximum ZT (ZT[subscript max]) of Ge is nine times larger than that of Si in the bulk phase, ZT[subscript max] of np-Ge is twice as large as that of np-Si due to the similarity in lattice thermal conductivity of the two np systems. Moreover, ZT[subscript max] is found to occur at a carrier concentration two orders of magnitude lower than that for with np-Si due to the dissimilarities in their electronic structure. |
| first_indexed | 2024-09-23T15:24:49Z |
| format | Article |
| id | mit-1721.1/79650 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:24:49Z |
| publishDate | 2013 |
| publisher | American Institute of Physics (AIP) |
| record_format | dspace |
| spelling | mit-1721.1/796502022-09-29T14:36:57Z Thermoelectric properties of nanoporous Ge Lee, Joo-Hyoung Grossman, Jeffrey C. Massachusetts Institute of Technology. Department of Materials Science and Engineering Grossman, Jeffrey C. We computed thermoelectric properties of nanoporous Ge (np-Ge) with aligned pores along the [001] direction through a combined classical molecular dynamics and first-principles electronic structure approach. A significant reduction in the lattice thermal conductivity of np-Ge leads to a 30-fold increase in the thermoelectric figure-of-merit (ZT) compared to that of bulk. Detailed comparisons with the recently proposed np-Si show that although the maximum ZT (ZT[subscript max]) of Ge is nine times larger than that of Si in the bulk phase, ZT[subscript max] of np-Ge is twice as large as that of np-Si due to the similarity in lattice thermal conductivity of the two np systems. Moreover, ZT[subscript max] is found to occur at a carrier concentration two orders of magnitude lower than that for with np-Si due to the dissimilarities in their electronic structure. National Science Foundation (U.S.) (University of California, Berkeley Grant 0425914) National Science Foundation (U.S.) (Network for Computational Nanotechnology Grant EEC-0634750) 2013-07-22T17:06:29Z 2013-07-22T17:06:29Z 2009-07 2009-04 Article http://purl.org/eprint/type/JournalArticle 00036951 1077-3118 http://hdl.handle.net/1721.1/79650 Lee, Joo-Hyoung, and Jeffrey C. Grossman. “Thermoelectric properties of nanoporous Ge.” Applied Physics Letters 95, no. 1 (2009): 013106. © 2009 American Institute of Physics https://orcid.org/0000-0003-1281-2359 en_US http://dx.doi.org/10.1063/1.3159813 Applied Physics 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 Institute of Physics (AIP) MIT web domain |
| spellingShingle | Lee, Joo-Hyoung Grossman, Jeffrey C. Thermoelectric properties of nanoporous Ge |
| title | Thermoelectric properties of nanoporous Ge |
| title_full | Thermoelectric properties of nanoporous Ge |
| title_fullStr | Thermoelectric properties of nanoporous Ge |
| title_full_unstemmed | Thermoelectric properties of nanoporous Ge |
| title_short | Thermoelectric properties of nanoporous Ge |
| title_sort | thermoelectric properties of nanoporous ge |
| url | http://hdl.handle.net/1721.1/79650 https://orcid.org/0000-0003-1281-2359 |
| work_keys_str_mv | AT leejoohyoung thermoelectricpropertiesofnanoporousge AT grossmanjeffreyc thermoelectricpropertiesofnanoporousge |