Adjusting the elemental composition of a host is regarded to be an effective strategy to tune its luminescent properties such as peak energy, emission efficiency and bandwidth. In this work, the cation‐substitution of (Ba2+→Sr2+) in self‐activated Sr6V2O11 was conducted to investigate the luminescence modification. All the phosphors of Sr6‐6xBa6xV2O11 (x=0, 0.1, 0.2, 0.3, 0.4, 0.5) were synthesized by the traditional chemical sol‐gel method. The morphological properties were measured through SEM and EDS measurements. The cation substitution brings out the disorder in the structure, which exerts modifications on the luminescence properties of Sr6V2O11. The luminescence intensity and corresponding decay lifetime were enhanced with the cation disorder in the self‐activated phosphor. Cation‐disorder in a phosphor lattice could be one of the effective approaches to improve the luminescence efficiency.
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