S4 Cu2 In2

semiconductor

· S4 Cu2 In2

S4Cu2In2 is a quaternary semiconductor compound combining sulfur, copper, and indium elements, likely a sulfide-based material in the ternary or quaternary chalcogenide family. This is a research-phase compound rather than a commercial semiconductor; materials in this compositional space are explored for photovoltaic absorber layers, solid-state battery electrolytes, and thermoelectric applications where the combination of earth-abundant copper and indium with sulfur offers potential cost advantages and tunable electronic properties compared to conventional silicon or CdTe systems.

thin-film photovoltaicssolar cellssolid-state batteriesthermoelectric energy conversionoptoelectronic devicesmaterials research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	9,690.1	ksi	—
Shear Modulus(G)	3,809.7	ksi	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.7214	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-0.5420	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 In2

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control