K2Ho4Cu4S9

semiconductor

· K2Ho4Cu4S9

K2Ho4Cu4S9 is an experimental ternary sulfide semiconductor compound containing potassium, holmium, and copper. This material belongs to the family of mixed-metal chalcogenides, which are of significant research interest for their tunable electronic and photonic properties. While not yet commercialized, such compounds are being investigated for potential applications in next-generation photovoltaics, thermoelectrics, and optoelectronic devices due to their layered crystal structures and ability to exhibit unusual band gap characteristics compared to conventional semiconductors.

photovoltaic researchthermoelectric materials developmentoptoelectronic devicessolid-state physics researchenergy conversion applicationsmaterials screening for semiconductors

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1930	lb/in³	—

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

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	2.430	eV	—
↳	0.9090	eV	—
Magnetic Moment(μB)	0.000	µB	—

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	—
Formation Energy(ΔHf)	-1.558	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.

K2Ho4Cu4S9

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control