Cu1.8S1

semiconductor

· Cu1.8S1

Cu1.8S1 is a copper sulfide semiconductor compound with a copper-rich stoichiometry, belonging to the family of metal chalcogenide semiconductors. This material is primarily of research interest for photovoltaic applications, particularly as an absorber or buffer layer in thin-film solar cells, where its adjustable bandgap and relatively high absorption coefficient make it attractive compared to conventional CdS alternatives. Cu1.8S1 is also investigated for thermoelectric and optoelectronic device applications, though commercial deployment remains limited and the material is considered a development-stage compound rather than an established industrial standard.

thin-film photovoltaicssolar cell absorbersthermoelectric devicesoptoelectronic researchCdS buffer layer replacementsemiconductor research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	2.300	eV	—

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

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.

Cu1.8S1

Electrical Properties

Regulatory Screening

Environmental

Export Control