Na2Se — Properties & Data | MatWorld

Na2Se

Name: Na2Se
Brand: MatWorld

semiconductor

· Na2Se

Na₂Se is an inorganic semiconductor compound composed of sodium and selenium, belonging to the antifluorite structure family of materials. While not widely deployed in commercial applications, it is studied in materials research for its potential in photovoltaic devices, solid-state electrolytes, and thermoelectric applications due to selenium's favorable electronic properties. Na₂Se represents an emerging class of sodium chalcogenides being investigated as alternatives to conventional semiconductors, particularly for energy conversion systems where sodium-based compounds offer potential cost and sustainability advantages over rare-earth or heavy-metal alternatives.

experimental photovoltaicssolid-state battery electrolytesthermoelectric devicesoptical materials researchsodium-ion electronicsmaterials screening for renewable energy

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	25.67	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2500	-	DFT · OptB88vdW
Shear Modulus(G)	15.76	GPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	2.649	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	2.000	eV	Measured
↳	2.173	eV	DFT · OptB88vdW
↳	3.933	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)2 entries	7.015	-	DFT · OptB88vdW
↳	7.520	-	DFT · PBE
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	4.197	-	DFT · OptB88vdW
↳	3.018	-	DFT · TBmBJ
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Electron Effective Mass(m*e)	0.2600	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	2.900	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000489	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00217	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-73.53	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	465.3	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	0.06000	%	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)	-1.156	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

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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.

Na2Se

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Physical Properties

Electrical Properties

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