Cu4 Se2

semiconductor

· Cu4 Se2

Cu₄Se₂ is a copper selenide compound semiconductor with a layered crystal structure, belonging to the family of metal chalcogenides studied for photovoltaic and thermoelectric applications. This material remains primarily in the research and development phase, investigated for its potential in thin-film solar cells, photodetectors, and solid-state thermoelectric devices due to its tunable bandgap and earth-abundant constituent elements. Engineers consider Cu₄Se₂ as a lower-cost, less-toxic alternative to cadmium telluride (CdTe) and lead halide perovskites in emerging photovoltaic technologies, though commercial-grade material and production processes are not yet established.

thin-film photovoltaicsphotodetectorsthermoelectric devicessemiconductor researchoptoelectronic applicationsnext-generation solar cells

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.00460	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	0.00100	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.

Cu4 Se2

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control