Using multi-site substitution to design blue-exciting phosphor Mg2Y2Al2Si2O12:Mn2+ for full-spectrum plant growth LEDs

Abstract

Full-spectrum plant growth light emitting diode (LED) prepared using a variety of phosphors has some problems, such as energy loss and spectral distortion. It is the solution that designing a kind of phosphor, which is the single activated ion doped phosphor with the multiple emission. To achieve this goal, the host Mg2Y2Al2Si2O12 (Abbreviated as: MYASO) was selected from a large number of garnet materials which has the multi-sites, and the Mn2+ was selected as the activated ion which can produce the different emission in the different crystal field. The results show that Mn2+ can produce the green light (536 nm), red light (635 nm) and deep red light (735 nm), which correspond to the Mn2+ substituting for the tetra-coordinated Al3+, the octa-coordinated Mg2+ and the hexa-coordinated Mg2+, respectively, importantly, this phosphor can be efficiently excited by the 456 nm blue light, which matches well with the blue LED chip. Therefore, it may be a great potential application value in the production of plant growth LEDs.