Li2GePbS4 — Properties & Data | MatWorld

Li2GePbS4

ceramic

· Li2GePbS4

Li₂GePbS₄ is a mixed-cation sulfide ceramic compound combining lithium, germanium, and lead in a sulfide matrix, representing a class of materials explored for solid-state ionic and optoelectronic applications. This composition falls within the research domain of superionic conductors and photovoltaic semiconductors, where the combination of light alkali metal (Li) with post-transition metals in a sulfide framework offers potential for fast lithium-ion transport or tunable bandgap properties. While primarily a laboratory material rather than a mainstream commercial compound, compounds in this family are investigated as potential solid electrolytes for all-solid-state batteries or as absorber layers in thin-film solar cells, where the multi-cation structure may provide advantages in ionic mobility or defect tolerance over simpler binary systems.

solid-state battery electrolytesall-solid-state energy storagethin-film photovoltaicssemiconductor researchionic conductor developmentnext-generation energy materials

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1506	lb/in³	DFT · OptB88vdW

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

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	2.328	eV	DFT · OptB88vdW
↳	3.009	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	50.65	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	8.010	-	DFT · OptB88vdW
↳	7.271	-	DFT · TBmBJ
Electron Effective Mass(m*e)	0.5000	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.6667	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)2 entries	0.4133	C/m²	DFT · OptB88vdW
↳	1.646	C/m²	DFT · PBE
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	DFT · PBE
Thermoelectric Power Factor(PF)2 entries	0.00410	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00325	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-305.7	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	305.3	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	4.560	%	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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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.9177	eV/atom	DFT · OptB88vdW

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

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.

Li2GePbS4

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental