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Article Dans Une Revue Advanced Functional Materials Année : 2022

Directional Thermal Diffusion Realizing Inorganic Sb2Te3/Te Hybrid Thin Films with High Thermoelectric Performance and Flexibility

Meng Wei
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Zhuang-Hao Zheng
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Fu Li
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Yang-Su Xie
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Hong-Li Ma
Guang-Xing Liang
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Xianghua Zhang
Ping Fan
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  • PersonId : 1022499

Résumé

Inorganic films possess much higher thermoelectric performance than their organic counterparts, but their poor flexibilities limit their practical applications. Here, Sb2Te3/Te-x hybrid thin films with high thermoelectric performance and flexibility, fabricated via a novel directional thermal diffusion reaction growth method are reported. The directional thermal diffusion enables rationally tuning the Te content in Sb2Te3, which optimizes the carrier density and leads to a significantly enhanced power factor of >20 mu W cm(-1) K-2, confirmed by both first-principles calculations and experiments; while dense boundaries between Te and Sb2Te3 nanophases, contribute to the low thermal conductivity of approximate to 0.86 W m(-1) K-1, both induce a high ZT of approximate to 1 in (Sb2Te3)(Te)(1.5) at 453 K, ranking as the top value among the reported flexible films. Besides, thin films also exhibit extraordinary flexibility. A rationally designed flexible device composed of (Sb2Te3)(Te)(1.5) thin films as p-type legs and Bi2Te3 thin films as n-type legs shows a high power density of >280 mu W cm(-2) at a temperature difference of 20 K, indicating a great potential for sustainably charging low-power electronics.

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Chimie
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Dates et versions

hal-03797271 , version 1 (01-06-2023)

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Paternité - Pas d'utilisation commerciale - Pas de modification

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Meng Wei, Xiao‐lei Shi, Zhuang-Hao Zheng, Fu Li, Wei-Di Liu, et al.. Directional Thermal Diffusion Realizing Inorganic Sb2Te3/Te Hybrid Thin Films with High Thermoelectric Performance and Flexibility. Advanced Functional Materials, 2022, 32 (45), pp.2207903. ⟨10.1002/adfm.202207903⟩. ⟨hal-03797271⟩
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