Bi4 S4 I4

semiconductor

· Bi4 S4 I4

Bi₄S₄I₄ is a layered bismuth chalcohalide semiconductor composed of bismuth, sulfur, and iodine elements. This is a research-phase compound that belongs to the family of mixed-halide and chalcogenide semiconductors, which are actively investigated for optoelectronic and photovoltaic applications due to their tunable bandgaps and potential lower toxicity compared to lead-based perovskites. The material's layered crystal structure and composition make it a candidate for next-generation thin-film solar cells, photodetectors, and light-emitting devices, though it remains largely in experimental development stages rather than established industrial production.

experimental photovoltaic devicesthin-film solar cellsphotodetectorsoptoelectronic researchhalide perovskite alternativesmaterials chemistry research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	21.83	GPa	—
Shear Modulus(G)	11.34	GPa	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	1.767	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-0.4650	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.

Bi4 S4 I4

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control