Cs4Cu3Bi9S17

semiconductor

· Cs4Cu3Bi9S17

Cs4Cu3Bi9S17 is a quaternary chalcogenide semiconductor compound containing cesium, copper, bismuth, and sulfur, belonging to the family of complex sulfide semiconductors. This material is primarily of research and development interest for thermoelectric and photovoltaic applications, where its layered structure and mixed-valence composition may enable efficient phonon scattering and tunable bandgap characteristics. While not yet widely deployed in production, compounds in this materials class are being investigated as alternatives to conventional semiconductors for energy conversion in niche environments where thermal or light-driven power generation is critical.

Thermoelectric power generationPhotovoltaic researchWaste heat recoveryAdvanced semiconductorsLaboratory/experimental compounds

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.9000	eV	—

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.

Cs4Cu3Bi9S17

Electrical Properties

Regulatory Screening

Environmental

Export Control