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Enhanced far-red emission via charge compensation for plant-growth lighting
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DOI：10.1016/j.ceramint.2026.08.157.png)
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Abstract
En 中文
The spread of indoor farming and greenhouse cultivation has created an urgent need for phosphors that efficiently emit far-red light to support plant growth. Mn4+-activated phosphors are ideally suited to this requirement, yet they generally suffer from inadequate emission intensity. Here we successfully synthesize a Mn4+-doped red phosphor, LaAl0.5Sb1.5O6: Mn4+ (LASO: Mn4+). The 2Eg → 4A2g transition enables LASO: Mn4+ to produce far-red luminescence with a maximum at 690 nm, along with two excitation bands at 330 and 470 nm, allowing efficient excitation by near-ultraviolet and blue light. Doping with Li+ ions markedly enhances the luminescence intensity. At a Li+ doping level of 2 mol%, LASO: Mn4+ shows approximately doubled the excitation and emission intensities. Meanwhile, its internal quantum efficiency increases from 25.43% to 46.39%. The results indicate that the LASO: Mn4+, Li+ phosphor exhibits great promise for indoor plant cultivation.
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