In1.99Cu0.01Se2.99

In1.99Cu0.01Se2.99 is a heavily indium-doped indium selenide compound with trace copper substitution, belonging to the III–VI semiconductor family. This material is primarily of research interest for thermoelectric and optoelectronic applications, where the copper doping is engineered to modify carrier concentration and electrical properties relative to parent indium selenide. The copper substitution at the indium site represents a tuning strategy common in semiconductor bandgap and transport property optimization, though this composition remains largely within exploratory materials science rather than established industrial production.