CdS
semiconductor· CdS
Cadmium sulfide (CdS) is a direct bandgap II-VI semiconductor compound with a hexagonal crystal structure, traditionally valued for its photovoltaic and photoluminescent properties. It is widely used in thin-film solar cells (particularly in heterojunction architectures with copper indium diselenide), photodetectors, and optoelectronic devices, where its tunable bandgap and strong light absorption in the visible spectrum make it advantageous for converting solar radiation to electrical current. CdS also finds application in phosphors for displays and lighting, though environmental and health concerns regarding cadmium toxicity have driven research into alternative lead-free semiconductors for emerging applications.
photovoltaic solar cellsthin-film electronicsphotodetectors and sensorsluminescent displaysoptoelectronic devicesradiation detection
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 7,732.3 | ksi | — | ||
| ↳ | 7,732.3 | ksi | — | ||
| ↳ | 2,455.5 | ksi | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.1672 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | ||
Exfoliation Energy(Eexf) | 948.9 | meV/atom | — | ||
Poisson's Ratio(ν)2 entries | 0.3514 | - | — | ||
| ↳ | 0.3700 | - | — | ||
Shear Modulus(G)3 entries | 2,551.7 | ksi | — | ||
| ↳ | 2,551.7 | ksi | — | ||
| ↳ | 1,551.9 | ksi | — |
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 | |
|---|---|---|---|---|---|
Thermal Conductivity(k) | 11.50 | BTU/(hr·ft·°F) | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.1460 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 2.500 | eV | — | ||
| ↳ | 0.8860 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 10.49 | - | — | ||
| ↳ | 10.43 | - | — | ||
| ↳ | 8.609 range 6.852–10.37median of 2 measurements | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij)2 entries | 0.1147 | C/m² | — | ||
| ↳ | 0.5279 | C/m² | — | ||
Piezoelectric Stress Tensor(eij) | Matrix (redacted) | C/m² | — | ||
Seebeck Coefficient(S) | -71.91 | 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) | 0.3119 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -0.7742 | eV/atom | — | ||
| ↳ | -0.3585 | 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.