O4 S2

semiconductor

· O4 S2

O4S2 is a sulfide-based semiconductor compound belonging to the family of metal sulfides and oxysulfides used in research and emerging optoelectronic applications. This material is of primary interest in photocatalysis, photovoltaics, and sensing applications where its band gap and electron transport properties can be engineered for light absorption and charge carrier dynamics. While not yet widely commercialized at scale, O4S2 represents an experimental material platform that could provide alternatives to conventional semiconductors in cost-sensitive or earth-abundant element applications.

photocatalytic water splittingthin-film photovoltaicsoptical sensorsresearch-stage optoelectronicsenvironmental remediation catalystsexperimental semiconductor devices

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	11.59	GPa	—
Shear Modulus(G)	7.213	GPa	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	2.646	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-1.087	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.

O4 S2

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control