Bi2Te2Se — Properties & Data | MatWorld

Bi2Te2Se

Name: Bi2Te2Se
Brand: MatWorld

semiconductor

· Bi2Te2Se

Bi₂Te₂Se is a layered chalcogenide semiconductor belonging to the bismuth telluride family, engineered with partial selenium substitution to tune electronic and thermal properties. This material is investigated primarily for thermoelectric energy conversion applications where it can convert temperature gradients directly into electrical voltage, and for potential topological properties in nanostructured or thin-film forms. Compared to unsubstituted Bi₂Te₃, the selenium incorporation modifies the bandgap and carrier concentration, making it relevant for mid-temperature thermoelectric devices and emerging quantum materials research where band topology may be exploited.

Thermoelectric cooling/power generationWaste heat recovery systemsTopological material researchTemperature-dependent electronic devicesNanostructured semiconductor applicationsSolid-state energy conversion

Compliance & Regulations

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

Units:

si imperial

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)	1,999.8	ksi	DFT
Exfoliation Energy(Eexf)	70.53	meV/atom	DFT · OptB88vdW
Shear Modulus(G)	1,413.2	ksi	DFT

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.2682	lb/in³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.3000	eV	Measured
↳	0.2300	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	90.06	-	DFT · OptB88vdW
Electron Effective Mass(m*e)	0.06000	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.07000	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00112	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00323	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-105.7	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	202.8	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°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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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.3113	eV/atom	DFT · OptB88vdW

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

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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.

Bi2Te2Se

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