KCu4AsS4 — Properties & Data | MatWorld

KCu4AsS4

Name: KCu4AsS4
Brand: MatWorld

semiconductor

· KCu4AsS4

KCu4AsS4 is a quaternary semiconductor compound combining copper, arsenic, and sulfur in a mixed-valence framework. This material belongs to the family of complex chalcogenide semiconductors and is primarily of research interest rather than established in mainstream production. The compound's potential applications center on solid-state electronics and photovoltaic research, where layered or complex crystal structures can enable novel electronic properties distinct from binary semiconductors; engineers considering this material should treat it as an experimental candidate requiring specialized characterization for their specific device requirements.

experimental semiconductorsphotovoltaic researchsolid-state electronic deviceschalcogenide materialsthermoelectric applicationsmaterials research prototypes

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	6,512.2	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3200	-	DFT · OptB88vdW
Shear Modulus(G)	2,778.9	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1508	lb/in³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	1.336	eV	DFT · OptB88vdW
↳	1.563	eV	DFT · TBmBJ
↳	1.900	eV	Measured
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	8.923	-	DFT · OptB88vdW
↳	7.447	-	DFT · TBmBJ
Thermoelectric Power Factor(PF)2 entries	0.00131	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000914	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-302.3	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	337.4	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	31.46	%	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)	0.00130	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.4410	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

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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.

KCu4AsS4

Mechanical Properties

Physical Properties

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