K2 Bi2 P4 S12

semiconductor

· K2 Bi2 P4 S12

K₂Bi₂P₄S₁₂ is a mixed-metal thiophosphate semiconductor compound combining potassium, bismuth, phosphorus, and sulfur in a layered crystal structure. This is a research-phase material studied for its potential in photovoltaic and optoelectronic applications, where the sulfur-rich framework and bismuth-containing chemistry offer tunable bandgap properties and possible advantages in visible-light absorption compared to conventional semiconductors. Interest in this material family stems from the search for lead-free, earth-abundant alternatives to chalcogenide semiconductors in solid-state devices and thin-film solar technologies.

photovoltaic researchoptoelectronic devicesthin-film semiconductorslead-free alternativesvisible-light absorbersmaterials chemistry research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	24.09	GPa	—
Shear Modulus(G)	12.87	GPa	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	2.172	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-0.5860	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.

K2 Bi2 P4 S12

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control