Abnormal Seebeck Effect in Vertically Stacked 2D/2D PtSe2/PtSe2 Homostructure
Abstract When a thermoelectric (TE) material is deposited with a secondary TE material, the total Seebeck coefficient of the stacked layer is generally represented by a parallel conductor model. Accordingly, when TE material layers of the same thickness are stacked vertically, the total Seebeck coef...
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| Format: | Article |
| Language: | English |
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Wiley
2022-12-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202203455 |
| _version_ | 1828084624602955776 |
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| author | Won‐Yong Lee Min‐Sung Kang Jae Won Choi Si‐Hoo Kim No‐Won Park Gil‐Sung Kim Yun‐Ho Kim Eiji Saitoh Young‐Gui Yoon Sang‐Kwon Lee |
| author_facet | Won‐Yong Lee Min‐Sung Kang Jae Won Choi Si‐Hoo Kim No‐Won Park Gil‐Sung Kim Yun‐Ho Kim Eiji Saitoh Young‐Gui Yoon Sang‐Kwon Lee |
| author_sort | Won‐Yong Lee |
| collection | DOAJ |
| description | Abstract When a thermoelectric (TE) material is deposited with a secondary TE material, the total Seebeck coefficient of the stacked layer is generally represented by a parallel conductor model. Accordingly, when TE material layers of the same thickness are stacked vertically, the total Seebeck coefficient in the transverse direction may change in a single layer. Here, an abnormal Seebeck effect in a stacked two‐dimensional (2D) PtSe2/PtSe2 homostructure film, i.e., an extra in‐plane Seebeck voltage is produced by wet‐transfer stacking at the interface between the PtSe2 layers under a transverse temperature gradient is reported. This abnormal Seebeck effect is referred to as the interfacial Seebeck effect in stacked PtSe2/PtSe2 homostructures. This effect is attributed to the carrier‐interface interaction, and has independent characteristics in relation to carrier concentration. It is confirmed that the in‐plane Seebeck coefficient increases as the number of stacked PtSe2 layers increase and observed a high Seebeck coefficient exceeding ≈188 µV K−1 at 300 K in a four‐layer‐stacked PtSe2/PtSe2 homostructure. |
| first_indexed | 2024-04-11T04:28:48Z |
| format | Article |
| id | doaj.art-f74eb2bffbde4b1998e3b5a6b9416ecc |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-04-11T04:28:48Z |
| publishDate | 2022-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-f74eb2bffbde4b1998e3b5a6b9416ecc2022-12-29T14:19:16ZengWileyAdvanced Science2198-38442022-12-01936n/an/a10.1002/advs.202203455Abnormal Seebeck Effect in Vertically Stacked 2D/2D PtSe2/PtSe2 HomostructureWon‐Yong Lee0Min‐Sung Kang1Jae Won Choi2Si‐Hoo Kim3No‐Won Park4Gil‐Sung Kim5Yun‐Ho Kim6Eiji Saitoh7Young‐Gui Yoon8Sang‐Kwon Lee9Department of Physics Center for Berry Curvature based New Phenomena Chung‐Ang University Seoul 06974 Republic of KoreaDepartment of Physics Center for Berry Curvature based New Phenomena Chung‐Ang University Seoul 06974 Republic of KoreaDepartment of Physics Center for Berry Curvature based New Phenomena Chung‐Ang University Seoul 06974 Republic of KoreaDepartment of Physics Center for Berry Curvature based New Phenomena Chung‐Ang University Seoul 06974 Republic of KoreaDepartment of Physics Center for Berry Curvature based New Phenomena Chung‐Ang University Seoul 06974 Republic of KoreaDepartment of Physics Center for Berry Curvature based New Phenomena Chung‐Ang University Seoul 06974 Republic of KoreaDepartment of Physics Center for Berry Curvature based New Phenomena Chung‐Ang University Seoul 06974 Republic of KoreaDepartment of Applied Physics The University of Tokyo Tokyo 113–8656 JapanDepartment of Physics Center for Berry Curvature based New Phenomena Chung‐Ang University Seoul 06974 Republic of KoreaDepartment of Physics Center for Berry Curvature based New Phenomena Chung‐Ang University Seoul 06974 Republic of KoreaAbstract When a thermoelectric (TE) material is deposited with a secondary TE material, the total Seebeck coefficient of the stacked layer is generally represented by a parallel conductor model. Accordingly, when TE material layers of the same thickness are stacked vertically, the total Seebeck coefficient in the transverse direction may change in a single layer. Here, an abnormal Seebeck effect in a stacked two‐dimensional (2D) PtSe2/PtSe2 homostructure film, i.e., an extra in‐plane Seebeck voltage is produced by wet‐transfer stacking at the interface between the PtSe2 layers under a transverse temperature gradient is reported. This abnormal Seebeck effect is referred to as the interfacial Seebeck effect in stacked PtSe2/PtSe2 homostructures. This effect is attributed to the carrier‐interface interaction, and has independent characteristics in relation to carrier concentration. It is confirmed that the in‐plane Seebeck coefficient increases as the number of stacked PtSe2 layers increase and observed a high Seebeck coefficient exceeding ≈188 µV K−1 at 300 K in a four‐layer‐stacked PtSe2/PtSe2 homostructure.https://doi.org/10.1002/advs.202203455homostructurehot‐carrier injectionin‐plane Seebeck effectinterfacial Seebeck effectMott relationplatinum diselenide |
| spellingShingle | Won‐Yong Lee Min‐Sung Kang Jae Won Choi Si‐Hoo Kim No‐Won Park Gil‐Sung Kim Yun‐Ho Kim Eiji Saitoh Young‐Gui Yoon Sang‐Kwon Lee Abnormal Seebeck Effect in Vertically Stacked 2D/2D PtSe2/PtSe2 Homostructure Advanced Science homostructure hot‐carrier injection in‐plane Seebeck effect interfacial Seebeck effect Mott relation platinum diselenide |
| title | Abnormal Seebeck Effect in Vertically Stacked 2D/2D PtSe2/PtSe2 Homostructure |
| title_full | Abnormal Seebeck Effect in Vertically Stacked 2D/2D PtSe2/PtSe2 Homostructure |
| title_fullStr | Abnormal Seebeck Effect in Vertically Stacked 2D/2D PtSe2/PtSe2 Homostructure |
| title_full_unstemmed | Abnormal Seebeck Effect in Vertically Stacked 2D/2D PtSe2/PtSe2 Homostructure |
| title_short | Abnormal Seebeck Effect in Vertically Stacked 2D/2D PtSe2/PtSe2 Homostructure |
| title_sort | abnormal seebeck effect in vertically stacked 2d 2d ptse2 ptse2 homostructure |
| topic | homostructure hot‐carrier injection in‐plane Seebeck effect interfacial Seebeck effect Mott relation platinum diselenide |
| url | https://doi.org/10.1002/advs.202203455 |
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