K2S
semiconductor· K2S
K2S (potassium sulfide) is an inorganic semiconductor compound belonging to the chalcogenide family, characterized by ionic bonding between potassium cations and sulfide anions. While primarily of research interest rather than established in high-volume production, K2S and related metal sulfides are investigated for optoelectronic and photovoltaic applications due to their semiconductor bandgap properties and potential for thin-film device fabrication. Interest in this material class stems from their lower toxicity profile compared to some cadmium- or lead-based alternatives, though processing challenges and moisture sensitivity have limited commercial deployment.
experimental photovoltaicsthin-film semiconductorsresearch optoelectronicschalcogenide materials developmentniche specialty semiconductors
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 20.73 | GPa | — | ||
Poisson's Ratio(ν) | 0.3000 | - | — | ||
Shear Modulus(G) | 9.860 | GPa | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 1.826 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 2.100 | eV | — | ||
| ↳ | 2.384 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 6.360 | - | — | ||
| ↳ | 5.830 | - | — | ||
| ↳ | 4.662 range 3.162–6.162median of 2 measurements | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -102.5 | µV/K | — |
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) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -1.301 | eV/atom | — | ||
| ↳ | -1.222 | eV/atom | — |
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
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.