Cu2 S1

semiconductor

· Cu2 S1

Cu2S (copper(I) sulfide) is an inorganic semiconductor compound belonging to the chalcogenide family, characterized by copper and sulfur bonding in a 2:1 stoichiometric ratio. Historically used in photovoltaic devices and photodetectors, Cu2S is primarily of interest in research contexts for thin-film solar cells and optoelectronic applications due to its narrow bandgap and tunable electrical properties. While largely superseded by more stable alternatives in commercial applications, Cu2S remains relevant in emerging photovoltaic research and as a model system for understanding phase stability and semiconductor interfaces in copper-based systems.

thin-film photovoltaicsphotodetectorsoptoelectronic researchsemiconductor device researchsolar cell developmentchalcogenide compound research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	13,817.3	ksi	—
Shear Modulus(G)	2,686.1	ksi	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.04500	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-0.08300	eV/atom	—

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.

Cu2 S1

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control