Temperature-Dependent Thermal Transport of Polycrystalline van der Waals Semimetallic PtSe2 Films

被引：4

作者：

Park, No-Won ^{[1
]}

Lee, Hyejeong ^{[2
]}

Choi, Jae-Won ^{[1
]}

Shin, Hosun ^{[2
]}

Kang, Min-Sung ^{[1
]}

Kim, Si-Hoo ^{[1
]}

Cho, Jung-Min ^{[1
]}

Kim, Min-Jeong ^{[1
]}

Kim, Gil-Sung ^{[1
]}

Lee, Sang-Kwon ^{[1
]}

机构：

[1] Chung Ang Univ, Dept Phys, Seoul 06974, South Korea

[2] Korea Res Inst Stand & Sci, Ctr Convergence Property Measurement, Div Ind Metrol, Daejeon 34113, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2023年 / 127卷 / 28期

基金：

新加坡国家研究基金会;

关键词：

THERMOELECTRIC PERFORMANCE; CONDUCTIVITY; FIGURE; MERIT;

D O I：

10.1021/acs.jpcc.3c03089

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report both phononic and electronic transports ofpolycrystallinelarge-area platinum diselenide (PtSe2) thin films by measuringin-plane thermal conductivity and the Seebeck coefficient using asuspended bridge-type method and a strain gauge-controlled suspendplatform, respectively. We observe the greatly suppressed in-planethermal conductivity of & SIM;2.6 W/m & BULL;K, which is approximately670% suppressed value, for 11 nm thick polycrystalline PtSe2 films as compared to that of an exfoliated similarly thick in-planesingle-crystalline PtSe2 layer at 300 K. This reductionis attributed to the enhanced phonon scattering in polycrystallinePtSe(2) thin films. The measured in-plane Seebeck coefficientand electrical conductivity of the samples are as high as & SIM;79 & mu;V/K and & SIM;416 S/cm at 300 K, respectively. Our findingscan pave the way toward an effective strategy for promising large-areaTE energy harvesting devices with a high figure-of-merit in 2D semimetallictransition-metal dichalcogenide materials.

引用

页码：13556 / 13561

页数：6

共 39 条

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