NaBiS2
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
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 33.46 | GPa | — | ||
Poisson's Ratio(ν) | 0.2000 | - | — | ||
Shear Modulus(G) | 25.61 | GPa | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 5.133 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 0.3800 | eV | — | ||
| ↳ | 1.168 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr) | 79.21 range 16.15–142.3median of 2 measurements | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 8.682 | C/m² | — | ||
Piezoelectric Stress Tensor(eij) | Matrix (redacted) | C/m² | — |
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.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.03360 | eV/atom | — | ||
Formation Energy(ΔHf) | -0.8414 | eV/atom | — |
Verified Unverified Low confidence (<80%) Link to source
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.