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.
Compliance & Regulations
| 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 | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Thermal Conductivity(k) | 11.50 | BTU/(hr·ft·°F) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.1460 | lb/in³ | — |
| 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 | — |
| 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 | — |