KAgSe — Properties & Data | MatWorld

KAgSe

metal

· KAgSe

KAgSe is an intermetallic compound composed of potassium, silver, and selenium that belongs to the class of layered metal chalcogenides. This is primarily a research material studied for its potential in electronic and photonic applications, particularly in contexts where two-dimensional or quasi-2D behavior is desirable; it is not currently produced at commercial scale for industrial applications. The material's layered crystal structure and relatively low exfoliation energy suggest promise for applications in thermoelectric devices, optoelectronic components, or as a precursor phase in advanced semiconductor research, though practical engineering adoption remains limited to specialized academic and exploratory industrial R&D settings.

experimental thermoelectric materialslayered semiconductor researchphotonic device developmentexfoliable materials for 2D applicationsmetal chalcogenide systems

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	4,631.1	ksi	DFT · OptB88vdW
Exfoliation Energy(Eexf)	101.5	meV/atom	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3100	-	DFT · OptB88vdW
Shear Modulus(G)	2,094.3	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1742	lb/in³	DFT · OptB88vdW

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

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	0.5640	eV	DFT · OptB88vdW
↳	2.038	eV	DFT · TBmBJ
↳	1.440	eV	DFT · HSE06
Dielectric Constant (Relative Permittivity)(εr)3 entries	20.16	-	DFT · OptB88vdW
↳	18.25	-	DFT · PBE
↳	10.15 range 6.614–13.69median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	7.693	-	DFT · OptB88vdW
↳	4.654	-	DFT · TBmBJ
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000400	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00229	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-63.99	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	304.7	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	22.16	%	DFT · TBmBJ

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)	-0.7246	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

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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.

KAgSe

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