Cu0.99In1.01Se2.01

semiconductor

· Cu0.99In1.01Se2.01

Cu₀.₉₉In₁.₀₁Se₂.₀₁ is a near-stoichiometric chalcopyrite semiconductor compound, essentially CuInSe₂ with minor compositional variations that represent a research-grade material rather than a commercial alloy. This compound belongs to the I-III-VI₂ ternary semiconductor family and is primarily investigated for thin-film photovoltaic applications, particularly as an absorber layer in CIGS (copper indium gallium selenide) solar cells and related heterojunction devices. The slight deviation from perfect stoichiometry (indicated by the subscripts) reflects defect engineering or processing control typical of laboratory synthesis, which can influence electronic properties and device efficiency compared to exactly stoichiometric CuInSe₂.

thin-film photovoltaic absorbersCIGS solar cellssemiconductor researchheterojunction device developmentdefect engineering studies

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	1.080	eV	—

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Regulatory Screening

Environmental

Export Control

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.

Cu0.99In1.01Se2.01

Electrical Properties

Regulatory Screening

Environmental

Export Control