Cu2O — Properties & Data | MatWorld

Cu2O

Name: Cu2O
Brand: MatWorld

semiconductor

· Cu2O

Cuprous oxide (Cu₂O) is a p-type semiconductor compound combining copper and oxygen in a direct bandgap structure. It has been historically used in rectifier applications and early photoelectric devices, and is now of significant research interest for photovoltaic energy conversion, particularly in thin-film solar cells and photoelectrochemical water splitting. Engineers consider Cu₂O for optoelectronic applications where its low toxicity, earth-abundant constituent elements, and optical properties offer advantages over cadmium telluride or lead halide alternatives, though device stability and efficiency remain active development areas.

thin-film photovoltaicsphotoelectrochemical cellsoptoelectronic sensorsrectifier diodes (legacy)photocatalysisresearch-stage energy conversion

Compliance & Regulations

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

Units:

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)3 entries	111.6	GPa	DFT
↳	115.2	GPa	DFT · OptB88vdW
↳	111.9	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.07600	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)2 entries	0.4600	-	DFT · OptB88vdW
↳	0.4650	-	DFT · PBE
Shear Modulus(G)3 entries	8.353	GPa	DFT
↳	8.500	GPa	DFT · OptB88vdW
↳	7.999	GPa	DFT · PBE

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
Density(ρ)	5.988	kg/m³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	2.580	eV	Measured
↳	2.590	eV	Measured
↳	0.6440	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	9.194	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	8.520	-	DFT · OptB88vdW
Electron Effective Mass(m*e)	1.010	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	1.760	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	0.00108	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00193	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-189.9	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	359.1	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	14.64	%	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)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.5240	eV/atom	DFT · OptB88vdW
↳	-0.5898	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.

Cu2O

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