Bi2Te2.1Se0.9

semiconductor

· Bi2Te2.1Se0.9

Bi₂Te₂.₁Se₀.₉ is a bismuth telluride-selenide solid solution, a p-type thermoelectric compound engineered by partial substitution of tellurium with selenium to optimize the electronic and thermal transport properties of the Bi₂Te₃ parent material. This quaternary composition sits within the family of bismuth chalcogenides that dominate room-temperature thermoelectric applications, chosen specifically for its tailored band structure and phonon scattering characteristics. The selenium doping improves the thermoelectric figure of merit (ZT) relative to unmodified Bi₂Te₃, making it relevant for near-room-temperature energy conversion where maximizing efficiency in compact devices is critical.

thermoelectric power generationwaste heat recoverycooling modules and refrigerationtemperature sensing and controlportable power systemsaerospace thermal management

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.2900	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.

Bi2Te2.1Se0.9

Electrical Properties

Regulatory Screening

Environmental

Export Control