Two‐Step Sol–Gel Synthetic Strategy for Highly Dispersed Eu2+ Luminescence Centers for Tuning Emission

The improvement of photoluminescence (PL) properties for phosphors that significantly impact the performance of white light emitting diodes (WLEDs), especially color rendition and luminous efficiency, is an extremely important challenge. Herein, an effective two‐step sol–gel synthetic strategy is developed to realize the regulation of PL spectra of Eu2+ in Ca9MnNa(PO4)7 (CMNP) crystal lattice to yield the white light emission in a single‐phase phosphor. The thermal stability of this CMNP‐based phosphor is improved as compared with the phosphor using a solid‐state method. The origin of the enhanced Eu2+ emission is investigated, and a thorough evaluation of the WLED fabricated using the white emitting phosphor demonstrated the two‐step sol–gel synthetic strategy is an effective way to adjust luminescence performance and provide another strategy to regulate PL spectra of luminescence materials in addition to the crystal field strategy based on ion substitution.