Soluble Telluride-Based Molecular Precursor for Solution-Processed High-Performance Thermoelectrics

Abstract

The recent interest in wearable electronics suggests flexible thermoelectrics as candidates for the power supply. Herein, we report a solution process to fabricate flexible Sb2Te3 thermoelectric thin films using molecular Sb2Te3 precursors, synthesized by the reduction of Sb2Te3 powder in ethylenediamine and ethanedithiol with superhydride. The fabricated flexible Sb2Te3 thin films exhibit a power factor of ∼8.5 μW cm–1 K−2 at 423 K, maintaining the properties during 1000 bending cycles. FePt nanoparticles are homogeneously embedded in the Sb2Te3 thin film, reducing the thermal conductivity. The current study offers considerable potential for manufacturing high-performance flexible thin film devices.

Solution‐Processed Stretchable Ag2S Semiconductor Thin Films for Wearable Self‐Powered Nonvolatile Memory

“…However, the composition of the purified complex changed its Ag:S ratio from 2:1 to 2:3, suggesting the exclusion of the byproduct of Ag‐rich complexes during the purification process. [ 56,57 ] These Ag‐rich complexes in the as‐synthesized solution deteriorated the microstructures in the spin‐coated thin film, as shown in the scanning electron microscopy (SEM) image (Figure S1a, Supporting Information), which might be attributed to different decomposition behaviors of mixed complexes. In contrast, the purified solution formed a highly uniform thin film with perfect surface coverage on a substrate using the spin coating process (Figure S1b, Supporting Information).…”

Cation-Exchange Synthesis of Lead Bismuth Sulfide Quantum Dots and Nanorods for Thermoelectric Applications

“…Many researchers have focused on the development of TE materials with high ZT values either by discovering new classes of materials or by applying various strategies to TE materials, such as defect engineering, band structure engineering, and nanostructuring. In particular, nanostructuring introduces numerous interfaces and grain boundaries inside materials, which can effectively scatter phonons and hence decrease thermal conductivity. − Ternary or quaternary metal sulfide compounds have been regarded as low-cost and high-efficiency TE materials. The homologous series of Pb 1– x Bi x S y compounds has recently been suggested as a new class of n-type high-temperature TE material because of their inherent extremely low thermal conductivity and good power factor .…”

Cu2Se-based thermoelectric cellular architectures for efficient and durable power generation

“…Thermoelectric (TE) power generation has been regarded as a reliable and durable way to recover dissipated waste heat, as it enables the direct conversion of heat to electricity without any environmental pollution. [1][2][3][4][5] Thus far, to achieve an e cient TE energy conversion, considerable efforts have been devoted toward the development of e cient TE materials, including traditional Bi 2 Te 3 -, [6][7][8][9] PbTe-, 10 and SiGe-based 11 alloys and emerging materials of liquid-like materials, [12][13][14][15] skutterudites, 16 half-Heuslers, 17 SnSe, 18,19 MgSb-based materials, 20 etc. [21][22][23] Among them, liquid-like TE materials within the "phononglass electron-crystal" concept have attracted tremendous attention due to their high e ciencies arising from ultralow thermal conductivities at high temperatures.…”