Bi2Te3 — Properties & Data | MatWorld

Bi2Te3

semiconductor

· Bi2Te3

Bismuth telluride (Bi₂Te₃) is a narrow-bandgap semiconductor and the most widely used thermoelectric material at room temperature, prized for direct conversion between thermal and electrical energy. It is the material of choice for thermoelectric cooling modules, power generation from waste heat, and temperature sensing applications across industrial, automotive, and consumer electronics sectors. Engineers select Bi₂Te₃ over alternatives because of its superior figure of merit near ambient conditions, established manufacturing processes, and proven reliability in applications requiring precise thermal management without moving parts.

thermoelectric cooling moduleswaste heat power generationtemperature control systemsportable refrigerationthermal sensors and detectorsautomotive climate systems

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

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Method

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)3 entries	15.01	GPa	DFT
↳	31.42	GPa	DFT · OptB88vdW
↳	15.29	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	3.729	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Exfoliation Energy(Eexf)	250.8	meV/atom	DFT · OptB88vdW
Poisson's Ratio(ν)2 entries	0.2500	-	DFT · OptB88vdW
↳	0.2049	-	DFT · PBE
Shear Modulus(G)3 entries	10.85	GPa	DFT
↳	20.97	GPa	DFT · OptB88vdW
↳	11.23	GPa	DFT · PBE

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

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Property	Value	Unit	Conditions	Source
Thermal Conductivity(k)2 entries	4.017	W/(m·K)	Measured · 27°C
↳	4.017	W/(m·K)	Measured

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

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Property	Value	Unit	Conditions	Source
Density(ρ)	7.813	kg/m³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions	Source
Band Gap(Eg)2 entries	0.2500	eV	Measured
↳	0.3510	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	115.6	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	35.24	-	DFT · OptB88vdW
Electron Effective Mass(m*e)	0.1500	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.2133	me	DFT · OptB88vdW · 27°C
Electrical Conductivity(σ)	2,222.2	S/cm	Measured · 27°C
Electrical Resistivity(ρe)	0.00000450	Ω·m	Measured · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)3 entries	0.00673	W/(m·K²)	Measured · 27°C
↳	0.00317	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00295	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)3 entries	-174	μV/K	Measured · 27°C
↳	-180.8	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	199.5	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Thermoelectric Figure of Merit(zT)	0.5025	-	Measured · 27°C

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

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Method

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.2469	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	0.00814	eV/atom	DFT · OptB88vdW
↳	-0.1631	eV/atom	Measured

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

Regulatory Screening

Environmental

Export Control

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.