KYGeS4

ceramic

· JVASP-40428· KYGeS4

KYGeS₄ is a layered metal germanium sulfide ceramic compound belonging to the family of two-dimensional materials and chalcogenides. This is a research-stage material investigated for its semiconducting and photonic properties rather than a conventional engineering ceramic. While not yet in mainstream industrial production, KYGeS₄ and related germanium sulfides are explored for optoelectronic devices, nonlinear optical applications, and solid-state physics research where their layered crystal structure and tunable band gap offer potential advantages over conventional semiconductors.

photonic researchnonlinear optical devices2D material researchsemiconductor opticsmaterials characterizationsolid-state physics

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1121	lb/in³	DFT · OptB88vdW

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

Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	2.322	eV	DFT · OptB88vdW
↳	3.204	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	12.01	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	5.839	-	DFT · OptB88vdW
↳	4.876	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.1505	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00140	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00120	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-304.5	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	308.4	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	2.800	%	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.

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-1.377	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.

KYGeS4 — Properties & Data | MatWorld

KYGeS4

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental