Electron-Transparent Thermoelectric Coolers Demonstrated with Nanoparticle and Condensation Thermometry

Abstract

More efficient thermoelectric devices would revolutionize refrigeration and energy production, and low-dimensional thermoelectric materials are predicted to be more efficient than their bulk counterparts. But nanoscale thermoelectric devices generate thermal gradients on length scales that are too small to resolve with traditional thermometry methods. Here we fabricate, using singlecrystal bismuth telluride (Bi 2 Te 3 ) and antimony/bismuth telluride (Sb 2−x Bi x Te 3 ) flakes exfoliated from commercially available bulk materials, functional thermoelectric coolers (TECs) that are only 100 nm thick. These devices are the smallest TECs ever demonstrated by a factor of 10 4 . After depositing indium nanoparticles to serve as nanothermometers, we measure the heating and cooling produced by the devices with plasmon energy expansion thermometry (PEET), a high-spatial-resolution, transmission electron microscopy (TEM)-based thermometry technique, demonstrating a ΔT = −21 ± 4 K from room temperature. We also establish proof-of-concept for condensation thermometry, a quantitative temperature-change mapping technique with a spatial precision of ≲300 nm.

Termoelektrik Soğutma Sisteminin Alternatif Transformatör Soğutma Sistemi Olarak Performansı

“…Bununla birlikte, soğutma kapasitesini arttırmak için termeelektrik soğutuculara fan takılmalı ve fan hızı arttırılarak, daha iyi bir soğutma sağlanabilmektedir (Jiang et al, 2019). Yapılan çalışmalarda, genellikle, termoelektrik soğutucuların performansı, verimlerinin arttırılması, parametrelerinin iyileştirilmesi ve termoelektrik etkilerinden bahsedilmektedir (Ahiska et al, 2009;Hubbard et al, 2020). Yeni imal edilen bir termoelektrik cihazın özelliklerinin incelendiği çalışmada, Si elementi ile karşılaştırma yapılmış ve termoelektrik soğutucunun 5 kat daha iyi performans sağladığı belirlenmiştir (Hsin et al, 2019).…”

First-Principle Investigations on the Electronic and Transport Properties of PbBi2Te2X2 (X = S/Se/Te) Monolayers

“…Thermoelectric (TE) materials that enable direct electrothermal energy conversion can have important applications in power generation [1,2], the recovery of waste heat, and on-chip cooling [3,4] and can thus provide a new route for green, clean energy to tackle the global energy crisis. However the application of TE devices has been limited by the low efficiency of their constitutive materials [5,6].…”

Thermoelectric effects at a Germanium-electrolyte interface: measuring 100 nK temperature oscillations at room temperature

“…measurements at the 10 to 100 nm scale [5]. Thermoelectric effects at the solid -liquid interface, more specifically, are relevant in a variety of different settings, from the technology of crystal growth [6] to devices such as electrolyte gated transistors [7,8].…”