Measurement System to Determine the Seebeck Coefficient and Electrical Conductivity of Thin Films

Autor(es)

Dalkiranis, Gustavo G. ; Bocchi, Joao H. C. ; Torres, Bruno Bassi Millan ; Lopeandia, Aitor F. ; Oliveira Jr, Osvaldo N. ; Faria, Gregorio C.

• Tipo de documento: Artigo Científico
• Fonte: IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT; v. 74, p. 6-pg., 2025-01-01.

Resumo

Thermoelectric (TE) materials are promising for energy-generating devices, and their design depends on a fast, precise determination of their Seebeck coefficient and electrical conductivity. Herein, a low-cost setup was developed to determine the Seebeck coefficient and electrical conductivity of thin films, allowing the calculation of the power factor (PF) (PF=S-2 sigma) . The system was validated by measuring the Seebeck coefficient and electrical conductivity of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), a widely used material in organic electronics and TE generators. The results demonstrate the high resolution of our system, with obtained values of 0.1 mu V/K for Seebeck coefficient, 0.1 S/cm for electrical conductivity, and 0.1 mu W/K-2 for PF. A detailed description of the fabrication of the measurement setup is provided, with the aim of making thermoelectricity accessible to any research laboratory, even in places with limited budgets. (AU)

• Processo FAPESP: 18/22214-6 - Rumo à convergência de tecnologias: de sensores e biossensores à visualização de informação e aprendizado de máquina para análise de dados em diagnóstico clínico
• Beneficiário: Osvaldo Novais de Oliveira Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 19/26375-7 - Estudo das propriedades termoeléctricas do polímero NDI-2Tz e sua aplicação em um microgerador termoelétrico
• Beneficiário: Gustavo Gonçalves Dalkiranis Pereira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado