Co-substitution strategy to achieve a novel efficient deep-red-emitting SrKYTeO6:Mn4+ phosphor for plant cultivation lighting

•A novel deep-red-emitting SrKYTeO6:Mn4+ phosphor was prepared for the first time.•The SrKYTeO6:Mn4+ phosphor was formed through the co-substitution of [K+−Y3+] for [Sr2+−Ca2+] in non-luminous Sr2CaTeO6:Mn4+.•A replicable strategy for further exploring novel Mn4+-doped perovskite phosphors.•The phos...

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