Bi2Te2S — Properties & Data | MatWorld

Bi2Te2S

ceramic

· JVASP-3903· Bi2Te2S

Bi₂Te₂S is a layered chalcogenide ceramic compound combining bismuth, tellurium, and sulfur—a derivative of the well-established Bi₂Te₃ thermoelectric family. This material is primarily investigated in thermoelectric and energy harvesting research, where the partial sulfur substitution for tellurium is engineered to tune electronic and phononic properties for improved performance in waste heat recovery systems. The layered crystal structure makes it a candidate for exfoliation into 2D nanosheets, positioning it at the intersection of bulk thermoelectrics and emerging van der Waals materials for advanced thermal management and solid-state cooling applications.

thermoelectric deviceswaste heat recovery2D nanomaterial researchsolid-state coolingenergy harvestingthermal management systems

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Exfoliation Energy(Eexf)	67.68	meV/atom	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	7.213	kg/m³	DFT · OptB88vdW

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

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	0.3040	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	85.97	-	DFT · OptB88vdW
Electron Effective Mass(m*e)	0.09667	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.1600	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	0.000955	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00286	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-97.97	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	194.5	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)	-0.3221	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

Regulatory Screening

Environmental

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.

Bi2Te2S

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental