SiSe2 — Properties & Data | MatWorld

SiSe2

Name: SiSe2
Brand: MatWorld

semiconductor

· SiSe2

SiSe₂ is a layered semiconductor compound composed of silicon and selenium, belonging to the class of chalcogenide semiconductors. It is primarily of research and developmental interest rather than an established commercial material, with potential applications in optoelectronic devices, photodetectors, and energy conversion systems where its tunable bandgap and layer-dependent properties could be leveraged. Engineers considering SiSe₂ should recognize it as an emerging material suitable for exploratory projects in next-generation photovoltaics, 2D device engineering, and specialty sensing applications, though manufacturing scalability and long-term reliability data remain limited compared to silicon or established III-V semiconductors.

photodetectors and optoelectronicsexperimental photovoltaics2D semiconductor researchinfrared sensingthermal imaging devicesnanoelectronics prototyping

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	2,597.6	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3300	-	DFT · OptB88vdW
Shear Modulus(G)	1,535.9	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1312	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)4 entries	1.720	eV	Measured
↳	1.740	eV	Measured
↳	1.742	eV	DFT · OptB88vdW
↳	2.606	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)2 entries	7.524	-	DFT · OptB88vdW
↳	4.820	-	DFT · PBE
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	6.193	-	DFT · OptB88vdW
↳	5.002	-	DFT · TBmBJ
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Electron Effective Mass(m*e)	0.5900	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	1.873	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	0.000848	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00139	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-137.1	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	291.2	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	10.58	%	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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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000100	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.3709	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.

SiSe2

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