biostudies-literatureLee WYKorean governmentSamsung Science and Technology FoundationSamsung Electronics Inc. via Samsung Science & Technology FoundationNational Research Foundation of Koreae2203455https://www.ebi.ac.uk/biostudies/studies/S-EPMC9799017biostudies-literatureUnknown9(36)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.Advanced science (Weinheim, Baden-Wurttemberg, Germany)Abnormal Seebeck Effect in Vertically Stacked 2D/2D PtSe₂ /PtSe₂ Homostructure.PMC9799017SRFC-MA-2002-052020R1A5A10165182020R1A2C1004979Kang MSLee SKKim SHKim YHSaitoh ELee WYKim GSYoon YGChoi JWPark NWfalseAbnormal Seebeck Effect in Vertically Stacked 2D/2D PtSe₂ /PtSe₂ Homostructure.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.2022-01-01T00:00:00Z2022 Dec2025-04-22T04:31:34.162Z2025-04-05T21:01:28.704ZS-EPMC97990173635419110.1002/advs.202203455