Tl2S

Name: Tl2S
Brand: MatWorld

semiconductor

· Tl2S

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.

infrared detectorsphotosensitive devicesresearch semiconductorsthermal imagingspectroscopic sensorschalcogenide optoelectronics

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.2889	lb/in³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.9840	eV	DFT · OptB88vdW
↳	1.000	eV	Measured
High-Frequency Dielectric Constant (ε∞)(ε∞)	12.95	-	DFT · OptB88vdW
Electron Effective Mass(m*e)	0.4033	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	1.870	me	DFT · OptB88vdW · 27°C
Thermoelectric Power Factor(PF)2 entries	0.00248	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00132	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-219.3	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	284.8	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

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, or test environment.

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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.3935	eV/atom	DFT · OptB88vdW
↳	-0.3282	eV/atom	Measured

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, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

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.

Tl2S — Properties & Data | MatWorld

Tl2S

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

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