S4 Cu2 Ga2

semiconductor

· S4 Cu2 Ga2

S4 Cu2 Ga2 is a quaternary semiconductor compound combining copper, gallium, and sulfur in a stoichiometric ratio, belonging to the I-III-VI family of semiconductor materials. This is primarily a research-phase material investigated for photovoltaic and optoelectronic applications due to its tunable bandgap and potential for thin-film device fabrication. Compared to binary semiconductors like CdTe or CIGS absorbers, quaternary Cu-Ga-S compounds offer compositional flexibility to engineer electronic properties, though they remain less commercially established and require further development for cost-effective manufacturability and long-term stability.

thin-film photovoltaic absorbersoptoelectronic device researchbandgap engineeringlaboratory-scale solar cellsmaterials research and development

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.7614	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-0.6430	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.

S4 Cu2 Ga2

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control