CoAsS — Properties & Data | MatWorld

CoAsS

Name: CoAsS
Brand: MatWorld

semiconductor

· CoAsS

CoAsS is a ternary semiconductor compound composed of cobalt, arsenic, and sulfur, belonging to the family of metal chalcogenide semiconductors. This material is primarily of research and developmental interest for next-generation optoelectronic and photovoltaic applications, where its tunable bandgap and potential for efficient charge carrier transport make it an alternative to conventional binary semiconductors. CoAsS systems are being investigated for thin-film solar cells, photodetectors, and light-emitting devices, offering potential advantages in cost, abundance, or performance over established III-V or II-VI semiconductors, though industrial deployment remains limited.

thin-film photovoltaicsphotodetectorsoptoelectronic deviceslight-emitting applicationssemiconductor researchnext-generation solar cells

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

Units:

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)2 entries	139.0	GPa	DFT
↳	130.7	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2500	-	DFT · OptB88vdW
Shear Modulus(G)2 entries	104.4	GPa	DFT
↳	80.76	GPa	DFT · OptB88vdW

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
Density(ρ)	6.098	kg/m³	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	0.6000	eV	Measured
↳	0.8180	eV	DFT · OptB88vdW
↳	0.7930	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)2 entries	29.84	-	DFT · OptB88vdW
↳	27.30 range 23.57–31.02median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	24.55	-	DFT · OptB88vdW
↳	33.79	-	DFT · TBmBJ
Electron Effective Mass(m*e)	2.710	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.9400	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)2 entries	0.02578	C/m²	DFT · OptB88vdW
↳	0.07114	C/m²	DFT · PBE
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	DFT · PBE
Thermoelectric Power Factor(PF)2 entries	0.00272	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00233	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-443.2	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	374.2	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	26.22	%	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)	0.000400	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.4919	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.

CoAsS

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