In4 S4

semiconductor

· In4 S4

In₄S₄ is an indium sulfide semiconductor compound belonging to the III-VI semiconductor family, characterized by a mixed-valence indium structure. This material is primarily investigated in research contexts for optoelectronic and photovoltaic applications, where its band gap and electronic properties show promise for thin-film solar cells, infrared detectors, and light-emitting devices. Relative to conventional alternatives like CdTe or CIGS solar absorbers, In₄S₄ offers potential advantages in terms of earth abundance and reduced toxicity concerns, though it remains less mature for industrial-scale production than established semiconductors.

thin-film photovoltaicsinfrared detectorsoptoelectronic researchvisible-light absorbersquantum dotssemiconductor research compounds

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	5,532.3	ksi	—
Shear Modulus(G)	3,435.5	ksi	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.9470	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-0.5840	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.

In4 S4

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control