Li4 Cu2 S4

semiconductor

· Li4 Cu2 S4

Li₄Cu₂S₄ is a mixed-metal sulfide semiconductor compound combining lithium and copper in a ternary system, belonging to the family of metal sulfides investigated for electrochemical and photonic applications. This is primarily a research material rather than a commercial commodity, studied for potential use in solid-state ionic conductors, battery electrolytes, and photovoltaic absorber layers due to the dual roles of lithium (ionic transport) and copper (electronic/optical activity). The material is notable in the context of next-generation energy storage and thin-film photovoltaics, where it competes with more established compounds like CZTS and halide perovskites.

solid-state battery electrolytesphotovoltaic absorbersionic conductorsthin-film solar cellselectrochemical energy storage research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.02410	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-0.8860	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.

Li4 Cu2 S4

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control