Synthesis, crystal growth and phase formation in the K–(Yb,Tm,Ho)–Mo–O system

Abstract

In the present work, the synthesis conditions and crystal growth as well as the phase transitions, morphology, and luminescence spectra of K(Yb_1−x−yTm_xHo_y)(MoO₄)₂ solid solutions have been studied. The intense white emission of Tm³⁺ and Ho³⁺ ions was obtained in polycrystalline and single crystal samples in the range x + y = 0.01–0.02. The phase formation in the K–(Yb,Tm,Ho)–Mo–O system was studied and single crystals of K(Yb,Tm,Ho)(MoO₄)₂ and (Yb,Tm,Ho)₂Mo₃O₁₂ were grown from the melts at different temperatures. The crystals exhibit white-light luminescence excited with a 980 nm source.