Near-infrared emission of Yb3+ sensitized by Mn4+ in La2MgTiO6

• DOI: 10.1016/j.jlumin.2017.04.063
• Publication Date: 2017-04-30T01:15:30Z
• Authors: Wei Li; Tiejin Chen; Wenbin Xia; Xiaoliang Yang; Siguo Xiao
• Keywords: Emission intensity

Abstract Mn4+/Yb3+ co-doped La2MgTiO6 near infrared phosphor were prepared by co-precipitation technique. The La2MgTiO6: Mn4+, Yb3+ phosphors can convert the short-wavelength sunlight in 250–550 nm spectral region into near infrared emission at 990 nm, which matches well with the high photosensitive region of Si-based solar cells. The mechanisms for the Mn4+→Yb3+ have been discussed based on the Mn4+ and Yb3+ concentration dependent steady-state and transient luminescence properties. The energy transfer efficiency is 31% in the La1.91MgTi0.998O6: 0.002Mn, 0.09Yb sample with the maximal 990 nm emission intensity. It is found that phonon-assisted energy transfer plays an important role in sensitization process from Mn4+ to Yb3+ in the Mn4+/Yb3+ co-doped La2MgTiO6.