p-Type aliovalent Li(I) or Fe(III)-doped CuO hollow spheres self-organized by cationic complex ink printing: Structural and gas sensing characteristics

[Display omitted] •Li(I) or Fe(III)-doped CuO hollow sphere films are prepared via cationic complex ink.•Substitutional doping of aliovalent cations modifies the electronic structure of CuO.•The gas response of CuO toward ethanol was enhanced with aliovalent Fe(III) doping. The p-type CuO hollow sph...

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