K5Eu1-xHox(MoO4)4: Structures and luminescence properties

The palmierite-type matrix with lanthanides is capable of producing customizable multicolored emission, and has characteristics such as long service life and high energy efficiency. This research explored the impact of synthesis method and composition on structural and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type structure. Two modifications with space group (SG) R 3m (alpha-phase) and C2/m (beta-phase) were observed and characterized. This study underscores the critical role of co-doping of Eu3+ and Ho3+ cations in manipulating charge transfer and luminescence efficiency in visible and IR region. The existence of 5D0 -> 7F0 transition in the PL spectra indicates stable local environment of Eu3+ cations regardless of synthesis conditions.