K2 Dy4 Cu4 Se9

semiconductor
· K2 Dy4 Cu4 Se9

K2Dy4Cu4Se9 is a mixed-metal chalcogenide semiconductor compound containing potassium, dysprosium, copper, and selenium—a quaternary phase that belongs to the broader family of layered and framework selenide materials. This is a research-stage compound, not currently established in high-volume industrial production; it is of interest in solid-state chemistry and materials discovery for its potential combination of mixed-valence metal centers and semiconductor properties. The dysprosium and copper redox activity, combined with the selenium framework, positions this material in the exploratory space for thermoelectric devices, photovoltaic materials, or ionic conductors where rare-earth–transition-metal chalcogenides are being investigated as alternatives to conventional semiconductors.

experimental thermoelectric materialsresearch semiconductorsrare-earth chalcogenidesphotovoltaic absorbers (exploratory)solid-state chemistrynext-generation energy conversion

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
PropertyValueUnitConditionsSource
Band Gap(Eg)
—
eV——
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Formation Energy(ΔHf)
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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.