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Recently, there has been a growing demand for broadband near‐infrared (NIR) phosphor. The paper proposes a novel Cr3+ doped Ca2Y3Sb3O14 phosphor through basic research of Ca2Ln3Sb3O14: Cr3+ (Ln = Sc, Lu, and Y) phosphor. Under 467 nm excitation, Ca2Y3Sb3O14: Cr3+ phosphor shows a broad NIR emission band (650–950 nm) centered at 776 nm with a full width at half‐maximum of 110 nm. The optimal Cr3+ doping...