Fe4 As4 S4

semiconductor

· Fe4 As4 S4

Fe₄As₄S₄ is a quaternary semiconductor compound combining iron, arsenic, and sulfur in a layered crystalline structure, belonging to the family of metal chalcogenide semiconductors. This material remains primarily in the research and development phase, studied for its electronic and optical properties as a potential candidate for photovoltaic applications, thermoelectric devices, and optoelectronic components where earth-abundant alternatives to conventional semiconductors are sought. Its mixed-metal composition offers tunable band gap and crystal structure characteristics compared to binary or ternary semiconductors, making it of interest in materials science for exploring new semiconductor chemistries.

experimental photovoltaic materialsthermoelectric researchoptoelectronic deviceslayered semiconductor structuresearth-abundant semiconductor alternativesmaterials research and development

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.00400	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-0.5150	eV/atom	—

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

Regulatory Screening

Environmental

Export Control

Quality & Standards

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.

Fe4 As4 S4

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control

Quality & Standards