In the pursuit of high-quality W-LED lighting, the precise control of emission color of phosphor materials is indispensable. Herein we report a series of single-composition Bi-doped LiCaMgVO garnet-structure phosphors, whose emission colors under n-UV excitation could be tuned from bluish green (480 nm) to yellow (562 nm) on the basis of local lattice distortion and VO → Bi energy transfer. Furthermore, full-color luminescence tuning from bluish green to orangish red across the warm white light region was successfully achieved by designing VO → Bi → Eu energy transfers. More interestingly, the thermal stabilities of as-prepared samples were gradually enhanced through designing VO/Bi → Eu energy transfers. This work provides a new perspective for color tuning originating from simultaneous local lattice distortion and multiple energy transfers.
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| http://dx.doi.org/10.1021/acs.inorgchem.8b01271 | DOI Listing |
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