K4 Cu2 Se8 Ta2

semiconductor

· K4 Cu2 Se8 Ta2

K4Cu2Se8Ta2 is a complex quaternary selenide compound combining copper, tantalum, and potassium in a layered crystal structure. This is a research-phase semiconductor material being investigated for its potential in photovoltaic and thermoelectric applications, leveraging the tunable band gap and layered topology of mixed metal selenides. While not yet commercialized, compounds in this family are of interest for next-generation energy conversion devices where alternatives like conventional CdTe or CIGS solar cells face efficiency or toxicity constraints.

photovoltaic researchthermoelectric devicessemiconductor thin filmslayered material researchenergy conversionmaterials exploration

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	2.025	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-0.9910	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.

K4 Cu2 Se8 Ta2

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control