Thallium sulfide (Tl₂S) is a binary semiconductor compound belonging to the chalcogenide material family, characterized by ionic bonding between thallium and sulfur. While primarily a research material rather than a mainstream industrial semiconductor, Tl₂S has been investigated for infrared detection and photosensitive applications due to its narrow bandgap and strong light absorption in the infrared region. Engineers consider Tl₂S and related thallium compounds where conventional semiconductors (Si, GaAs) are insufficient for long-wavelength infrared sensing, though toxicity concerns and limited commercial maturity restrict adoption compared to alternatives like HgCdTe or lead chalcogenides.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 7.998 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 1.000 | eV | — | ||
| ↳ | 0.9840 | eV | — | ||
Seebeck Coefficient(S) | -219.3 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -0.3282 | eV/atom | — | ||
| ↳ | -0.3935 | eV/atom | — |