Idioma:

Investigation and field effect tuning of thermoelectric properties of SnSe2 flakes

Pallecchi, Ilaria ; Caglieris, Federico ; Ceccardi, Michele ; Manca, Nicola ; Marré, Daniele ; Repetto, Luca ; Schott, Marine ; Bilc, Daniel ; Chaitoglou, Stefanos ; Dimoulas, Athanasios ; Verstraete, Matthieu

American Physical Society 2023-05

Texto completo disponível

Citações Citado por

Enviar para

Título:
Investigation and field effect tuning of thermoelectric properties of SnSe2 flakes
Autor: Pallecchi, Ilaria ; Caglieris, Federico ; Ceccardi, Michele ; Manca, Nicola ; Marré, Daniele ; Repetto, Luca ; Schott, Marine ; Bilc, Daniel ; Chaitoglou, Stefanos ; Dimoulas, Athanasios ; Verstraete, Matthieu
Assuntos: Dichalcogenides ; Field-effect ; Higher integration ; Materials Science (all) ; Physical, chemical, mathematical & earth Sciences ; Physics ; Physics - Materials Science ; Physics - Mesoscopic Systems and Quantum Hall Effect ; Physics and Astronomy (miscellaneous) ; Physique ; Physique, chimie, mathématiques & sciences de la terre ; Property ; Thermo-Electric materials ; Thermoelectric material ; Thermoelectric power factors ; Thermoelectric properties ; Two-dimensional materials ; Van der Waal
Notas: scopus-id:2-s2.0-85159761295
Descrição: The family of van der Waals dichalcogenides (vdWDs) includes a large number of compositions and phases, exhibiting varied properties and functionalities. They have opened up a novel electronics of two-dimensional materials, characterized by higher integration and interfaces which are atomically sharper and cleaner than conventional electronics. Among these functionalities, some vdWDs possess remarkable thermoelectric properties. SnSe2 has been identified as a promising thermoelectric material on the basis of its estimated electronic and transport properties. In this work we carry out experimental measurements of the electric and thermoelectric properties of SnSe2 flakes. For a 30-μm-thick SnSe2 flake at room temperature, we measure electron mobility of 40 cm2V-1s-1, a carrier density of 4×1018cm-3, a Seebeck coefficient S≈-400μV/K, and thermoelectric power factor S2σ≈0.35mWm-1K-2. The comparison of experimental results with theoretical calculations shows fair agreement and indicates that the dominant carrier scattering mechanisms are polar optical phonons at room temperature and ionized impurities below 50 K. In order to explore possible improvement of the thermoelectric properties, we carry out reversible electrostatic doping on a thinner flake, in a field effect setup. On this 75-nm-thick SnSe2 flake, we measure a field effect variation of the Seebeck coefficient of up to 290% at low temperature, and a corresponding variation of the thermoelectric power factor of up to 1050%. We find that the power factor increases with the depletion of n-type charge carriers. Field effect control of thermoelectric transport opens perspectives for boosting energy harvesting and novel switching technologies based on two-dimensional materials.
Editor: American Physical Society
Data de criação/publicação: 2023-05
Idioma: Inglês

Voltar para lista de resultados

Anterior Resultado 9 Avançar Ir para próxima página

Realização: Logos de Redes Sociais:

Investigation and field effect tuning of thermoelectric properties of SnSe2 flakes

Pallecchi, Ilaria ; Caglieris, Federico ; Ceccardi, Michele ; Manca, Nicola ; Marré, Daniele ; Repetto, Luca ; Schott, Marine ; Bilc, Daniel ; Chaitoglou, Stefanos ; Dimoulas, Athanasios ; Verstraete, Matthieu

American Physical Society 2023-05

Buscando em bases de dados remotas. Favor aguardar.