Up-conversion luminescence of RE3+ -doped polymer composites KGd (WO4)2&PMMA

Abstract Poly(methyl methacrylate) (PMMA)-based luminescent materials are of prime interest for many new optoelectronic devices. This work presents the spectroscopic properties of PMMA-based composites containing KGd(WO 4 ) 2 :Yb 3+ /Er 3+ /Tm 3+ , KGd(WO 4 ) 2 :Yb 3+ /Tm 3+ and KGd(WO 4 ) 2 :Yb 3+ /Er 3+ powders. These systems exhibit effective multicolor up-conversion luminescence in VIS and NIR spectral range under 980 nm excitation. The vibrational properties of the composites were investigated for the first time using the μ-Raman spectroscopy. The obtained results suggest that the KGd(WO 4 ) 2 :Yb 3+ /Er 3+ /Tm 3+ &PMMA integrated system can be successfully used as a new phosphor for the up-conversion based optoelectronic devices.