Ag2S — Properties & Data | MatWorld

Ag2S

Name: Ag2S
Brand: MatWorld

semiconductor

· Ag2S

Silver sulfide (Ag₂S) is a narrow-bandgap semiconductor compound belonging to the chalcogenide family, formed from the combination of silver and sulfur elements. It is primarily investigated for optoelectronic and photonic applications where its narrow bandgap enables detection and emission in the infrared and visible wavelength ranges. Ag₂S is notably used in infrared detectors, photocells, and historical photographic emulsions, though it has largely been superseded by synthetic alternatives in commercial photography; however, it remains of significant research interest for emerging applications in quantum dots, thin-film solar cells, and infrared sensing devices due to its tunable optical properties and potential for low-cost manufacturing.

infrared detectorsphotovoltaic devicesquantum dot researchphotodiodes and sensorsthin-film optoelectronics2D material research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	44.91	GPa	DFT · OptB88vdW
Exfoliation Energy(Eexf)	155.4	meV/atom	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3900	-	DFT · OptB88vdW
Shear Modulus(G)	10.11	GPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	6.659	kg/m³	DFT · OptB88vdW

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

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	1.230	eV	Measured
↳	1.074	eV	DFT · OptB88vdW
↳	1.928	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)2 entries	17.65	-	DFT · OptB88vdW
↳	11.71	-	DFT · PBE
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	9.921	-	DFT · OptB88vdW
↳	6.795	-	DFT · TBmBJ
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)2 entries	0.1909	C/m²	DFT · OptB88vdW
↳	0.06179	C/m²	DFT · PBE
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	DFT · PBE
Thermoelectric Power Factor(PF)2 entries	0.00128	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00405	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-125	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	306.6	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	24.58	%	DFT · TBmBJ

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)	0.00200	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.07359	eV/atom	DFT · OptB88vdW
↳	-0.1099	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

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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.

Ag2S

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