NaBiS2 — Properties & Data | MatWorld

NaBiS2

Name: NaBiS2
Brand: MatWorld

semiconductor

· NaBiS2

NaBiS₂ is a ternary semiconductor compound combining sodium, bismuth, and sulfur in a layered crystal structure. This material remains largely in the research phase, studied primarily for optoelectronic and photovoltaic applications where its direct bandgap and layered morphology offer potential advantages for light absorption and charge transport. While not yet commercialized at scale, NaBiS₂ belongs to a family of bismuth chalcogenides attracting attention as lead-free alternatives for thin-film solar cells and photodetectors, motivated by bismuth's lower toxicity compared to conventional lead-based semiconductors.

Thin-film photovoltaics (research phase)PhotodetectorsLead-free semiconductor alternativesOptoelectronic devicesTwo-dimensional materials research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	4,853	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2000	-	DFT · OptB88vdW
Shear Modulus(G)	3,714.4	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1854	lb/in³	DFT · OptB88vdW

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

Filter by

Method

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	0.3800	eV	Measured
↳	1.667	eV	DFT · OptB88vdW
↳	2.339	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	79.21 range 16.15–142.3median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	10.12	-	DFT · OptB88vdW
↳	7.534	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	8.682	C/m²	DFT · PBE
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	DFT · PBE
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	15.82	%	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)	0.03360	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.8414	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

Export Control

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.

NaBiS2

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

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