The influential mechanism of Ti doping on thermoelectric properties of Bi0.5Sb1.5Te3 alloy

Feng, Bo; Tang, Yong; Lei, Juan

doi:10.1007/s10854-021-07232-3

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…In the exploration results, most selected materials contained the dopants of Ti, Fe, Ga, Se, and Ag, and we were able to crosscheck the improved thermoelectric performances by Ag and Ti in experiments [41][42][43] . We plotted ZTs of Ag-and Ti-doped Bi 0.5 Sb 1.5 Te 3 for different measuring temperatures, as shown in Fig.…”

Section: Exploration Of Virtual Dopant Spaces For Discovering High-zt...mentioning

confidence: 88%

A public database of thermoelectric materials and system-identified material representation for data-driven discovery

Chang

2022

npj Comput Mater

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Thermoelectric materials have received much attention as energy harvesting devices and power generators. However, discovering novel high-performance thermoelectric materials is challenging due to the structural diversity and complexity of the thermoelectric materials containing alloys and dopants. For the efficient data-driven discovery of novel thermoelectric materials, we constructed a public dataset that contains experimentally synthesized thermoelectric materials and their experimental thermoelectric properties. For the collected dataset, we were able to construct prediction models that achieved R2-scores greater than 0.9 in the regression problems to predict the experimentally measured thermoelectric properties from the chemical compositions of the materials. Furthermore, we devised a material descriptor for the chemical compositions of the materials to improve the extrapolation capabilities of machine learning methods. Based on transfer learning with the proposed material descriptor, we significantly improved the R2-score from 0.13 to 0.71 in predicting experimental ZTs of the materials from completely unexplored material groups.

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Section: Exploration Of Virtual Dopant Spaces For Discovering High-zt...mentioning

confidence: 88%

A public database of thermoelectric materials and system-identified material representation for data-driven discovery

Chang

2022

npj Comput Mater

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“…2 shows the maximum ZT achieved for bulk thermoelectric materials over the past six years as a function of temperature. 33–234…”

Section: Strategiesmentioning

confidence: 99%

Recent advances in designing thermoelectric materials

2022

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“…A ZT of ∼1.27 at 373 K was reported in Sn-doped Bi 0.5 Sb 1.5 Te 3 due to increment in hole concentration and phonon scattering from micro-grains, twin boundaries, and mass fluctuations [37]. Ti-doped Bi 2 Te 3 has a maximum ZT of ∼1.25 at 340 K. This improved ZT is due to the creation of impurity levels and increased density of state near fermi levels [38]. A high ZT of ∼1.1 at 323 K was reported with the incorporation of Potassium and Tellurium in Bi 2 Te 3 [39].…”

Section: Introductionmentioning

confidence: 97%

Enhancement in thermoelectric performance of hydrothermally synthesized Ca and Sb co-doped Bi₂Te₃ nanostructures

Rani,

Gupta,

Dalal

et al. 2024

Phys. Scr.

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Ca & Sb co-doped Bi2Te3 compounds have been prepared by hydrothermal method at 210 ℃ for 24 hr and investigated their thermoelectric properties. Phase purity and crystallinity were analyzed by XRD. All the prepared samples have rhombohedral crystal structure with space group R-3m. The hexagonal nanoplate-like morphology was examined by FESEM. Elemental analysis was done with EDX. Band gap energy of prepared samples has values in the range of ~0.40-0.65 eV, obtained by Tauc plot. The Raman shift was obtained at a lower frequency with doping. Carrier concentration increased with doping from 3.18×1020 cm-1 to 9.34×1020 cm-1. The high value of power factor (PF) of ~10.8 ×10-4 Wm-1K-2 was obtained due to high carrier concentration. An ultralow lattice thermal conductivity of ~0.28 and ~0.63 W/mK at 420 K, was obtained for Ca0.06Bi1.88Sb0.06Te3 and pure Bi2Te3, respectively. A maximum ZT of ~0.78 at 386 K was obtained for Ca0.03Bi1.94Sb0.03Te3. The value of ZT thus obtained is about ~ 51% higher than the ZT of pure Bi2Te3 (~0.39 at 386 K).

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The influential mechanism of Ti doping on thermoelectric properties of Bi0.5Sb1.5Te3 alloy

Cited by 5 publications

References 27 publications

A public database of thermoelectric materials and system-identified material representation for data-driven discovery

A public database of thermoelectric materials and system-identified material representation for data-driven discovery

Recent advances in designing thermoelectric materials

Enhancement in thermoelectric performance of hydrothermally synthesized Ca and Sb co-doped Bi₂Te₃ nanostructures

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The influential mechanism of Ti doping on thermoelectric properties of Bi0.5Sb1.5Te3 alloy

Cited by 5 publications

References 27 publications

A public database of thermoelectric materials and system-identified material representation for data-driven discovery

A public database of thermoelectric materials and system-identified material representation for data-driven discovery

Recent advances in designing thermoelectric materials

Enhancement in thermoelectric performance of hydrothermally synthesized Ca and Sb co-doped Bi2Te3 nanostructures

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Product

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Enhancement in thermoelectric performance of hydrothermally synthesized Ca and Sb co-doped Bi₂Te₃ nanostructures