A double-perovskite Mn4+-doped Sr2ScNbO6 phosphor for indoor plant growth lighting

To find suitable far-red-emitting phosphors in the field of plant lighting, a series of double-perovskite Mn4+-doped Sr2ScNbO6 (abbreviated as SSNO: Mn4+) phosphors were prepared and their crystal structure, morphology, and photoluminescence were analyzed. SSNO: Mn4+ phosphor produces far-red light with a peak wavelength of 702 nm. And this phosphor has two unique efficient broad excitation bands located respectively around 313 nm and 357 nm in the near-ultraviolet (UV) regions. The optimal doping concentration of Mn4+ ions, the dependence of luminescence on temperature, and the decay pattern of the samples were investigated. In addition, the light emitting diode (LED) was prepared by the combination of a 365 nm chip and SSNO: Mn4+ phosphor, which can emit bright far-red light. Therefore, SSNO: Mn4+ phosphors are expected to be applied in field of indoor plant cultivation.