BeSe — Properties & Data | MatWorld

BeSe

ceramic

· BeSe

Beryllium selenide (BeSe) is a wide-bandgap semiconductor ceramic compound formed from beryllium and selenium, belonging to the II-VI semiconductor family. It is primarily of research and development interest for optoelectronic and high-temperature applications, where its wide bandgap and thermal properties are leveraged; industrial adoption remains limited compared to more mature semiconductors like GaAs or InP, but the material shows promise in UV detectors, high-energy radiation sensing, and specialized photonic devices where its bandgap characteristics offer advantages over conventional alternatives.

UV photodetectorsRadiation-hard semiconductorsHigh-temperature electronicsResearch optoelectronicsX-ray/gamma-ray sensingWide-bandgap device research

Compliance & Regulations

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

Units:

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	11,371	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2200	-	DFT · OptB88vdW
Shear Modulus(G)	8,284.6	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Thermal Conductivity(k)	62.40	BTU/(hr·ft·°F)	Measured

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1530	lb/in³	DFT · OptB88vdW

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

Filter by

Method

Property	Value	Unit	Conditions	Source
Band Gap(Eg)3 entries	4.000	eV	Measured
↳	3.374	eV	DFT · OptB88vdW
↳	4.012	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)3 entries	7.750	-	DFT · OptB88vdW
↳	7.720	-	DFT · PBE
↳	6.925 range 6.117–7.734median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	6.330	-	DFT · OptB88vdW
↳	5.468	-	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	0.5933	C/m²	DFT · OptB88vdW
↳	0.1201	C/m²	DFT · PBE
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	DFT · PBE
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	0.01000	%	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)	0.03930	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.8910	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.